oryza sativa morphological characters

34, 43, 55, 56, 58, 59, 60, 61, 62, 63, 64 and L-, L-7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 22, 26, 28, 2, 46, 47, 48, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63, 64 and L-. 197) > 1000-grain weight (0.165 and 0.136). L-5, 17, 42, 54, 55, 56, 61, 62, 63 and 64. The principal component analysis revealed that five among the thirteen principal components were significant (eigenvalue >1) and contributed to 29.96%, 20.26%, 13.56%, 11.68%, and 9.22% of the total variance, respectively. Although most of them were of medium grain type, their 1000 kernel weight varied between 12.62 g and 25.65 g. From the observed chemical properties, Pahelo Anadi (9:73 ± 0:55mm) showed the highest gel consistency and lowest apparent amylose content (7:23 ± 0:36%). L-4, 5, 6, 8, 11, 25, 27, 29, 41, 42, 44, 45, 46, 47, 48, 61, 62, 63 and 64. and 39 . After the Green Revolution, the increase in the choice of modern varieties at the expense of landraces has become a major cause of varietal loss. Summary. Grain yield was significantly correlated with its component characters like the number of productive tillers per square metre (r = 0.241** and r = 0.274**), biological yield (r = 0.803** and r = 0.312**), harvest index (r = 0.250** and r = 0.677**), and the number of filled grains per panicle (r = 0.495** and r = 0.633**) in both years. The first three principal components explained about 79.05% of the total variation The first and second principal components were mostly related with the physical and chemical characteristics while the third and fourth principal components were concerned with cooking characters. This study examines the effects of climate change (e.g., maximum temperature, minimum temperature, rainfall, relative humidity, and the sunshine) on the major crops of Pakistan (e.g., wheat, rice, maize, and sugarcane). Path coefficient analysis revealed highest direct effect on grain yield for number of grains per panicles and 1000 grains weight. An experiment was conducted at the National Bureau of Plant Genetic Resources station at Ranchi and a rice research farm, also at Ranchi, during 1989-94 using 6 rice cultivars (NIC 40484, NIC 10514, CR 3001, AC 1225, Blackgora and Browngora) to evaluate the inheritance and linkage relationship of some morphological traits. Annually approximate 120.6 million tons of rice is being produced and on the basis of production it occupies second position in the world (Food and Agriculture Statistics, 2010). It also focuses on the physiological aspect of maize crop. The upland rice accessions are natural reservoir of genetic variability for various biotic and abiotic stresses. Based on this study highly distinguish and high yielding traditional rice genotypes (Sanna mundaga, Kasse bai and champakali) would be suitable for registration as farmers variety and such genotypes can also be utilized in crop improvement programme in terms both quality traits and high yield even as source or breeding material for pest and disease resistance. of genitors for rice plant breeding programs. Character association studies revealed significant and positive association of grain yield per plant with tillers per plant, panicle per plant, no. The rice landraces have been grown and consumed since time immemorial and have an important role in livelihood and food security [5]. Distribution of 544 varieties along the first axis of a principal component analysis of the variation for 9 morphological characters. characteristics of landraces of rice variety. In this study 480 farmers were selected randomly from 12 districts representing entire five development regions and surveyed using semi-structured questionnaire. height, grain width, decorticated grain width, 50% flowering and maturity time were the principal discriminatory The benefit-cost ratio of rice production was the highest in Central Development Region indicating the most efficient production practice in the country. L-2, 3, 7, 12, 18, 22, 24, 28, 35, 43 and L-, L-1, 2, 3, 4, 5, 6, 11, 12, 13, 14, 15, 16, 17, 18, 21. The objective of the study was to characterize thirty landraces of rice (Oryza sativa L.) of Lamjung and Tanahun district based on 30 qualitative and 8 quantitative characters, recorded as per descriptor established by IRRI, Bioversity International and WARDA. Correlation is significant at the 0.01 Level (2-tailed); *. L-1, 2, 3, 4, 5, 6, 8, 7, 9, 10, 11,12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24. Thus, the present study can be utilized for further rice improvement programs and can also be used for assessing genetic diversity among morphologically distinguishable rice landraces. Objectives: The maximum intercluster distance was obtained between clusters V and VI (D2 = 40.18) followed by clusters III and VI (D2 = 36.17) and clusters IV and VI (D2 = 35.74). 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 63 and 64, Morphological Characterization of Traditional Rice Gen. L-1, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 23, 24, 25, 26. Indonesian Journal of Agricultural Science. Therefore, these characters could be used as criteria for selection of genotypes with high seed yield. This indicated that these characters were mostly governed by nonadditive gene action (dominance and epistasis). 30 qualitative and 8, quantitative characters were recorded as per, CV%), Pearson’s correlation and cluster analysis, Qualitative characters are the most important, characters to identify a plant variety and are, economic scenario and natural selection (Swargi, leaf sheath color. O. sativa has persistent spikelets, O. rufipogon has deciduous spikelets and O. longistaminata is perennial with creeping and branched rhizomes (Bor, 1960; Takeoka, 1963). 1000 grains weight exhibited strong positive direct effect on seed yield, however, it contributed negatively seed yield through number of grains per panicle. L-40, 43, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59 and 60. The quantum of production has increased from 0.3 million ton in 1966 to nearly 1.1million ton at present. Shannon and Simpson’s indices were calculated for 18 qualitative traits. Agro-morphological characterization of crop is the basic criteria to provide fundamental information for plant breeding programs. O. sativa, as they often lack clear distinguishing morphological characteristics (Vaughan & Morishima 2003). L-5, 10, 11, 12, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 62. Inter-cluster distances were higher than the intra-cluster distances reflecting wider genetic diversity among the genotypes of different groups. Keeping the severity of situation an attempt is being made to collect, document and conserve indigenous varieties of rice which are fast. Pollen morphological studies of 19 species of Oryza (Poaceae) were carried out using LM and SEM. The main objective of the present work was to characterize 34 landraces of rice of Bankura District of West Bengal, based on 12 quantitative agro-morphological characters. Assessment of character contribution to the divergence for some rice varieties. Pearson correlation coefficient, The un-weighted variable pair group method of the average linkage cluster analysis (UPGMA), principal component analysis (PCA), were used to analyze the data obtained. This is mainly due to easy availability and judicious use of production inputs. e low intracluster distance indicated that the landraces in the clusters were closely related. The areas to the east and northeast are low lying alluvial plains, similar to predominating rice lands of Bengal. The accessions PKSLGR-16, PKSLGR-23, PKSLGR-43 and PKSLGR-45 are found to be most promising for yield and two to four of its component traits. twenty-nine morphological and eight agronomical traits. Environmental influence was meagre on expression of characters as evidenced by narrow gap between GCV and PCV for most of the characters. Analysis of variance revealed that existence of significant variation among accessions for all the quantitative traits. 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 4, L-1, 3, 8, 10, 11, 12, 13, 21, 23, 24, 27, 28 and 31. While selecting a landrace as a parent in a breeding program, other numerous factors need to be considered. 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63 and 64. distinguishable rice landraces. Oryza sativa contains two major subspecies: the sticky, short-grained japonica or sinica variety, and the nonsticky, long-grained indica rice [] variety. Morphological Characterization of Traditional Rice (Oryza sativa L.) Genotypes of Southern Transitional Zone, Karnataka, According to DUS Test Guidelines March 2016 of grains per plant, spikelet fertility (SF), harvest index, 1000 grain weight and grain yield per plant. 27, 28, 29, 30, 31, 32, 33, 34, 35, 37 and 38. among the 13 characters. variable pair group method of the average linkage cluster analysis (UPGMA-Person) were used to It is considered as the Bankura district of West Bengal is also a great producer of rice. Very small difference between GCV and PCV was observed for the characters like days to 50% flowering and flag leaf breadth. L-1, 2, 3, 7, 8, 9, 10, 14, 15, 20, 22, 23, 28, 31, 32, 33, 34, 35. Agro-morphic characterization of these twenty landraces was done during 2011-12 & 2012-13 kharif session at the Village of Ranbahal, PO-Amarkanan of this District. These characters could be hypothesized as derived from mixing of germplasm either of cultivated or wild rice varieties indicating the possibilities of cross-pollination among wild, cultivated and weedy rice eco-types. 2011; MOAD 2016/17). All the yield attributing traits were high heritability and it could be suggested that the characters were governed predominantly by additive gene actions and grain yield was positively correlated with flag leaf area and high density seed indicating the importance of these traits as selection criterion in yield enhancement programmes. In the principal component analysis, the first four principal components retained 73.8% of the variance. Shobha R N, Shobha Rao L V, Viraktamath B C and Mishra B. Julino B O. Shannon and Simpson’s indices were calculated for 18 qualitative traits. But most of the modern high yielding varieties are medium and fine grained. Distance between cluster centroids of 30 rice landraces from Lamjung and Tanahun district. Agro-morphological, Oryza sativa f. spontanea , salient trends, Weedy rice. Morphological characterisation of Italian weedy rice (Oryza sativa) populations. land and present productivity is about 120.6 million tons per year. Importance of land races is larger than life in agriculture system, because improvement in existing variety depends upon desirable genes which are possibly present in land races and wild varieties only. L-1, 3, 4, 5, 6, 7, 8, 11, 13, 17, 18, 20, 21, 26, 34, 35, 36, 37, 43, 46, 47, 48, 50, 51, 52, 53, 54, 61, 62, 63, 64 and L-, L-1, 4, 8, 18, 19, 20, 21, 24, 25, 32, 54, 55, 56 and 64. The rice landraces have varied agromorphological characters, and some of the landraces are promising in terms of yield. L-2, 9, 10, 12, 14, 15, 16, 19, 22, 23, 24, 25, 27, 30, 31, 32, 39, 40, 41, 42, 44, 55, 56, 57, 58, 59, 60 and L-. Biswajit Mondal. Thus, as MV replace local landraces the threat of genetic erosion and eventual extinction is increased. Eleven exine surface patterns are distinguished at x 20,000 magnification under SEM. analyzed quantitative data. Green revolution is considerably held to improve production of food grains in our country and its role in achieving status of self sufficiency in food grain is beyond any doubt. 25,26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 38, 39 and 57. Plant height (0.1977*) and test weight The maximum intercluster distance was obtained between clusters V and VI (D2 = 40.18) followed by clusters III and VI (D2 = 36.17) and clusters IV and VI (D2 = 35.74). improvement programme for enhancement both qualitative and quantitative traits. It is the staple food for half of the world’s population. Also, 13% of landraces possessed strong aroma while noble cooking properties were showed by Thakali Lahare Marsi with the highest elongation ratio (2:41 ± 0:05) and by Chiniya with the lowest gruel solid loss (0:033 ± 0:03%) and minimum optimum cooking time (23:45 ± 0:03 min). Flag leaf length showed positive significant correlation with penultimate leaf length (r=0.674**), total tillers (r=0.437**), effective tillers (r=0.356**) and Grain Length: Breadth ratio (r=0.430**). The results show that varietal loss is pervasive and will accelerate if no proper initiative is taken to protect them. L-12, 19, 27, 58, 59, 60, 61, 62, 63 and 64. India is centre of origin and as per rice is concerned all together this country proudly possess 88,681 different variety of rice, out of that 55,615 are landraces, 1,171 are wild races and 32,895 are other varieties. 1. The filled-grain per panicle exhibited a high estimate of PCV and GCV, followed by the effective tiller and filled grain percentage. L-3, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 13 and 44. The overall net profit was Rs 16,147 per ha. Agro-morphological, Oryza sativa f. spontanea , salient trends, Weedy rice. Large numbers of rice landraces are grown by only a few farmers in small plots. awned characters were apomorphic in WR eco-type populations in Sri Lanka. Genotypes such as Sanna mundaga, Agriculture in West Bengal is the means of livelihood of about 65% of the population of the state living in villages with over 95% as small and marginal farmers. L-1, 3, 8, 10, 11, 12, 13, 21, 23, 24, 27, 28, 31, and L-, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64 and L-, L-7, 20, 25, 34, 35, 37, 38, 41, 50, 51, 52, 53, and L-. Fifty five traditional rice varieties of West Bengal, mostly from the lateritic region, were investigated for grain morphological characters. A set of 542 Nagina 22 mutants were morphologically characterized under DUS test guidelines and compared UPGMA clustering of the genotypes was done where members of cluster IV were found to be more superior. Cluster analysis showed maximum and minimum intracluster distance in cluster VI (D2 = 35.77) and cluster I (D2 = 18.59), respectively. 46, 47, 48, 49, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63 and 64. X and XIV (2056.50) inferring, crosses between these two clusters could exploit maximum heterosis. related mostly to the yield, yield attributing, and grain characteristics. Cheng, K.S. 36, 40, 43, 44, 45, 46, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63 and 64. Grain characters viz., hulled and non-hulled, grain length and width exhibited distinctness among the genotypes. 2. In the present investigation, high heritability associated with high genetic advance was found in the characters grain yield per hill and sterility percentage. Visual observations were recorded on five plant basis as per standard descriptors on sixteen qualitative characters viz., basal leaf sheath color, leaf auricle, leaf ligule, ligule shape, leaf collar, flag leaf: attitude of blade, leaf sheath anthocyanin colouration, leaf blade: anthocyanin, panicle secondary branch, leaf senescence, spikelet: color of tip of lemma, panicle: exsertion, panicle: awns and lemma: anthocyanin coloration of area below apex. great impact to the diversity of landraces. It is nec- essary to develop site-specific strategies to conserve local rice diversity and en- hance its use to improve the livelihoods of rural farming communities. The experiments were laid out in a Randomized Complete Block Design (RCBD) with three replications. Rainfall effect towards the yield of a selected crop is negative, except for wheat. Multivariate analysis involves observation and analysis of more than one statistical variable at a time. Plants derived from unpollinated ovary culture of ten rice genotypes showed significant variability in agro-morphological characteristics. distinct across the genotypes. Characterization has confirmed the existence of Distinctness, uniqueness and stability for the traits studied as given in the guidelines. High level of inter-cluster distance was found between cluster II and V and between cluster I and III. panicle. References. For this purpose, 80 breeding lines derived from 11 different cross populations in the F6 generation and their 10 parents were tested in a randomised complete block experiment design with two replications at the Thrace Agricultural Research Institute in 1995. 2003. Fig. According to the results from the first year, 49 breeding lines were selected, and they and their 10 parents were tested in a randomised complete block experiment design with three replications in the same institute in 1996. The principal component analysis revealed that five among the thirteen principal components were significant (eigenvalue >1) and contributed to 29.96%, 20.26%, 13.56%, 11.68%, and 9.22% of the total variance, respectively. To produce a new variety that is superior in terms of production and benefits, one of the information needed is agronomic and morphological character knowledge, which is very necessary to determine the kinship between varieties used as a basis for determining the parent in plant breeding. L-2, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 21, 22, 23, 24, 25, 26. L-1, 2, 3, 18, 34, 42, 50, 51, 52 and 53. Regression and Correlation Analysis of Some Morphological and Agronomic Characters in F2 Generation of Rice (Oryza sativa L.) Afifuddin Latif Adiredjo, Damanhuri … Agro-morphological, Oryza sativa Join ResearchGate to find the people and research you need to help your work. Kaase bai and Champakali which are genetically variable and high yielders over local check varieties could be utilized in crop indica Kato) were collected from different ecological niches. (0.2559*) showed positive and significant correlation with grain yield at phenotypic level. 49, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63 and 64. The phenotypic correlations among the traits and their path coefficient were estimated in both years. The mean square values of morphological traits correlated significantly in percent sterility 328.576, percent fertility 319.121, and 100 grams of seed weight 1.11788. Based on twelve characters, the genotypes were grouped into five clusters. distinctiveness, uniformity and stability. hybridization program. The improvement in grain yield will be efficient, if the selection is based on the biological yield, the harvest index, the number of productive tillers per square metre and the number of filled grains per panicle under temperate conditions. High genotypic and phenotypic coefficient of variation, heritability and genetic advance as per cent of mean was recorded for total number of grains per panicle, fertile spikelet per panicle, number of effective tillers per plant, leaf width and grain yield per plant. © 2008-2020 ResearchGate GmbH. 47, 48, 49 50, 51, 52, 53, 54, 55, 59, 60, 61, 62, 63 and 64. Days to maturity contributed maximum (36.41%) towards divergence, followed by straw yield per plant (19.54%). Landraces from clusters V and VI or clusters III and VI or clusters IV and VI can be used in the hybridization program to develop the superior hybrids by exploiting heterosis in segregating generation. 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63 and 64. Based on this research highly distinguish rice genotypes would be opt for There are so many rice landraces were cultivated in this district in near past. The k-means color clustering method has been used to segment the target regions in the paddy plant images. In Nepal rapid loss of local crop varieties has ac- companied ad hoc promotion of modern varieties (MV) and changes in land use. This indicates a strong inherent association among grain yield per plant and other morpho-physiological characters. The frequency distribution of qualitative characters were studied where panicle shattering, lemma & palea color, culm lodging resistance and Leaf senescence showed high variability. Campus, during June–November 2018 to determine relation among individuals, estimate the relative contribution of various traits of rice using principal component analysis, and identify the potential parents for hybridization using Mahalanobis distance (D2). Data were recorded on days to 50% flowering, plant height, tillers per plant, panicle per plant, panicle length, leaf length, leaf width, leaf area index, canopy temperature, biological yield, spikelet per plant, no. The set of six combined agro-morphological characteristics recorded during maturity growth stage has given the highest average paddy plant variety recognition accuracies of 91.20% and 86.33% using the BPNN and SVM classifiers respectively. derived by UPGMA from 8 qualitative traits. The variability existing in the rice landraces is the source of variation and offers a substantial opportunity for the development of new varieties. These characters were predominantly governed by additive gene action. The adoption of MV is based on higher yield potential, better market demand, better pricing and reduced lodging compared with local landraces. They, spacing between row to row and 20 cm between, applied in two splits, one at time of tillering and, The standard agronomic practices were adopted, for normal crop growth. Path coefficient analysis revealed that biological yield (0.748 and 0.481) and harvest index (0.413 and 0.704) had the highest positive direct effects on grain yield in both years. of effective tillers plant -1 , days for 1 st flowering as well as for 50% flowering, flag leaf, panicle length and moderate yield. The grain yield of Bangaarugandu, Bagyajyothi, Ratnachudi, Balaji and Kempudoddi landraces was more than check (Jyothi). L-2, 3, 37, 40, 42, 56, 57, 58, 59 and 63. Morphological Characterization of mutant lines of Nagina22 in rice (Oryza sativa L.) N. P. Sakthi Avinash, K.Manonmani, R.Muthuvijayaragavan, S.Rajeswari, S.Manonmani Tamil Nadu Agricultural University Physically hard working people prefer bold grained rice with good taste and qualities. Cluster III showed the highest mean value for grain width, flag leaf breadth, yield, and minimum mean value for plant height while mean values of total grain per panicle, filled grain percentage, and thousand-grain weight were maximum in cluster IV. Professors Amit Khanal, Mahesh Jaishi, Kapil, us with valuable landraces as research materia, urce/statistical-information-nepalese-agricul-, Characterization and assessment of variabil, ... e intracluster distance is due to the heterogeneous nature of the landrace within a cluster. Collection, preservation and characterization of such cultivars may provide great opportunity to utilize them in crop Grain characters showed polymorphism with respect to, hulled and non hulled grain length, width and color. with Nagina 22 as a check variety. The coefficient of variation ranged from 5.4% (Grain Length: Breadth ratio) to 20% (Total Tillers) indicating that selection based on the characters showing higher variation is expected to be effective. Wide difference between GCV and PCV was observed for the characters like plant height, flag leaf length, effective branch tillers per hill, panicle length, sterility percentage and yield per plant. Analysis of variance showed significant difference among the genotypes to all the characters under both control and low-moisture stress condition. Zafar N, Aziz S, and Masood SH. width (64.06%), medium days to heading (62.50%), Table 2 Morphological characterization of traditional rice, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63 and 64, L-1, 3, 6, 22, 25, 33, 34, 35, 41, 43, 46, 49, 50 and 51. L-36, 42, 50, 51, 52, 53, 54, 55, 56, 61, 62, 63 and 64. Sumer Pal Singh. Significant variations (p < 0:05) were found in all the properties that were evaluated. Promising landraces were identified from different yield attributing characters like total tillers, total grains per panicle, 1000 grain weight, panicle length and filled grain percentage. All rights reserved. Characterization has confirmed the existence of Distinctness, Uniqueness and Stability The first and second principal components were mostly related with the physical and chemical characteristics while the third and fourth principal components were concerned with cooking characters. L-5, 7, 8, 10, 11, 13, 15, 16, 18, 19, 20, 21, 23, 24, 27, 28, 30, 31, 33, 34, 35. Hence, selection based on these traits could help to bring simultaneous improvement of yield and its components, significant association with days to 50 per cent flowering and days to maturity under control condition, while test weight, number of tiller per plant, number of productive tiller per plant, number of spikelet per panicle and per cent spikelet fertility both under control and low-moisture stress conditions at phenotypic level as well as genotypic level. But high yielding varieties, which are the back bone of green revolution have indirectly stimulated erosion of landraces and wild varieties of rice. METHODS: In this study, the dry seeds of O. sativa were irradiated at 0, 20, 40, 60, 80, 100, and 120 Gy, followed by in-vitro germination under controlled conditions. have been cultivated by farmers as well as local promoters. Morphological and grain characterısatıon of Macedonian weedy rice (Oryza satıva L.) Vol. PCA showed the contribution of each characters to the classification of the rice landraces into different cluster groups. 52, 53, 55, 56, 57, 59, 60, 61, 62, 63 and 64. L-1, 3, 6, 11, 17, 20, 36, 37, 41, 45, 47, 50, 51, 54 and 58. A significant amount of variation was displayed for most of the agronomical traits examined. 30 rice landraces on their physicochemical and cooking characteristics which aim to promote the revival of old landraces. Landraces from Anadi group, Jetho Budo, Jarneli, and Rato Masino performed well in PC1 while landraces such as Mansara, Pakhe Sali, and Aanga performed well in PC2. DUS Characterization of Rice (Oryza Sativa L.) Using Morphological Descriptors and Quality Parameters Show all authors. In this study, we assessed and evaluated milled rice of 30 rice landraces on their physicochemical and cooking characteristics which aim to promote the revival of old landraces. Pearson correlation matrix, Principal Component Analysis (Pearson –n type), the unweighted Pusa Sugandha one of the most promising one showed maximum plant height at maturity, no. Wide variation among the grain morphological. Keywords. 1 identi ed as Oryza sativa At various times, more than 100 names have been proposed for the Oryza species, including 19 for O. sativa alone (Oka 1988; Lu 2004). Morphological characterization of traditional rice genotypes according to DUS test guidelines, All figure content in this area was uploaded by B. M. DUSHYANTHA Kumar, All content in this area was uploaded by B. M. DUSHYANTHA Kumar on Aug 16, 2016, Research Journal of Agricultural Sciences, Morphological Characterization of Traditional R, T C Sridhar, B M Dushyantha Kumar, B R Mani* and G K Nishanth. Bankura district of West Bengal has been described as the " connecting link between the plains of Bengal on the east and Chota Nagpur plateau on the west. " These cultivars were refined through selection depend on 48,49, 50,51, 52, 53, 54, 55,60,61, 62, 63 and 64. The first three principal components explained about 86.9% of the total variation among the 12 characters. Phenotypic variances for the traits under study were higher than genotypic variances in the seasons suggesting that the traits were more responsive to environmental influence. The characters were days to 50% flowering, plant height, flag leaf length, flag leaf breadth, effective branch tillers per hill, panicle length, sterility percentage and grain yield per hill. L-3, 7, 13, 19, 21, 35, 36, 53, 54, 55, 56, 63 and 64. pp 6-13. All rights reserved. distinctiveness, uniformity and stability. 20, issue 1 - 2 (2018) 9 to the taxon No. Obviously land races are disappeared fast. For Cluster analysis of qualitative traits the cultivars were grouped into five clusters based on similarity tonnes all over the world. The result showed that the highest milling recovery was found in Indrabeli (75.55%) whereas the lowest was found in Kalo Masino (66.98%) and bulk density ranged from 0.81 g/cm3 to 0.88 g/cm3 showing not much variability. Direct selection of characters of these traits based on phenotypic expression by a simple selection method would be more reliable for yield improvement. Superior characters possessed by rice landraces can be further assessed for the breeding programs so that the cultivation of these cherished rice landraces can be enhanced. A wide variation of grain characters, like gain size and shape, anthocyanin colouration of lemma-palea and kernel, presence or absence of aroma, awning characteristics, ware found among the studied varieties. quantitative morphological characters with 82 agro-morphic descriptors was carried out. 1,20,2,19,13,22,29,26,15,27,4,5,6,18,7,16,25, cluster III and IV was 75.8108 & cluster II and IV, 1,2,3,4,5,6,9,10,11,12,14,18,19,22,23,25,26,27,28. improvement as well as breeding programs. contributing traits of 30 landraces of rice. Presently more than 70% of rice cultivation is being done using high yielding variety only. Six parameters of physical properties, four parameters of chemical properties, and five parameters of cooking properties were evaluated based on the standard protocols. al.4 on six qualitative characters viz., basal leaf sheath colour, flag leaf attitude (late obseravtion), lemma anthocyanin colouration of apex, stigma colour, stem anthocyanin L-4, 20, 28, 40, 43, 34, 32, 47, 50, 51, 53, 55, 59, 61 and 63. for improvement of agronomic, nutritional, Table 3 Mean values of yield and its component characters, would be suitable for registration as farmers variet. Characterization has confirmed the existence of Distinctness, uniqueness and stability for the traits studied as given in the guidelines. Heritability estimate varied from 9.15% for panicle length to 99% grain yield. evaluation for crop improvement program and can be used for assessing genetic diversity among morphologically Main component analysis of morphological traits in thirty-nine accessions of rice (Oryza sativa L.) grown in a rainfed lowland ecology of Nigeria Adeyemi Anthony Kojibola Department of Crop Production, Faculty of Agricultural Science, University of Benin, Edo, Nigeria. grain yield, grain length, cooking quality, aroma and refitting to various abiotic stresses. ... Long-type landraces are still preferred by local people like Jetho Budo, Rato Masino, Chiniya, and Jarneli and even rice with medium-grain shape like Pahelo Anadi and Rato Anadi are preferred. Rice is the most important staple food crop grown in Nepal. Variation for 9 morphological characters and constitution of axis 1 of its principal component analysis. This study attempts to assess the loss of farmer-named local rice (Oryza sativa L.) varieties from Bara, a community in the central Terai of Nepal. The principle morphological characteristics of the genus include rudimentary sterile lemmas, bisexual spikelets, and narrow, linear, herbaceous leaves with scabrous margins. Keywords. These problems need to be addressed to improve the production situation and efficiency of rice production in the country. Focus Group Discussions and field plot observations were employed to verify the informa- tion and draw conclusions. The present work is so much important in respect to the present scenario of agro-biodiversity of this region as well as identification, conservation and documentation of landraces variety for future crop improvement. of grains per plant, spikelet fertility, harvest index, and yield per hectare exhibited medium heritability. The genotypic correlation coefficient was found to be higher than the corresponding phenotypic correlation coefficient. This analysis helps to enabled pattern of variation of the germplasm of landraces of rice and identification of the major traits contributing to the diversity of landraces. Codes of cultivars are showed in Table 1. ermplasm lines using PVC pipes under saline and normal soil condition. PC1 included the traits that were The climatic condition adversely affects maturation and reproductive cycle of plants. In 2008, seeds of 149 weedy rice populations were collected from the major Italian rice cultivation area. divergence of sixteen qualitative characters and sixteen quantitative characters. L-4, 5, 6, 8, 12, 13, 15, 20, 22, 24, 25, 27, 29, 34, 35, 39, 43, 46, 49 and 50. The preference, choice, and the economy of rice (Oryza sativa L.) largely depend on its physicochemical and cooking properties, which are found to be superior for landraces than modern varieties. Numbers of spikelets per panicle were ranged from very low (L-54, L-51 & L-52) to very high (L-56, L-53, L-42 & L-38). The rice accessions were characterized using 28 morphological descriptors, which included 15 qualitative and 13 … There is an urgent need of developing HYVs to increase rice productivity in India as well as North Eastern Hill Region. The associations among yield components, and their direct and indirect influence on the grain yield of rice were investigated. L-12, 15, 34, 40, 46, 44, 31, 35, 42, 47, 8, 41, 19, 9, 54, 55, 56 and 57.  Confirmation of salinity tolerance using molecular markers. The maximum value, minimum value, coefficient of variation and Pearson correlation were analyzed to study quantitative characters. High heritability, along with a high genetic advance was found in 10 traits, including 1000 grain weight, grain length, and filled grain per panicle indicated the presence of additive gene action. coefficient of Jaccard. Sterility percentage, effective branch tiller per hill and panicle length had high coheritability with grain yield suggesting that selection for these characters would improve grain yield. Germplasm having these characters in the genetically distant cluster could, therefore, offer a significant scope for the development of high yielder through judicious selection. Characterization for 20 qualitative and 13 Based on this study highly distinguish and high yielding traditional rice genotypes (Sanna mundaga, Kasse bai and champakali) would be suitable for registration as farmers variety and such genotypes can also be utilized in crop improvement programme in terms both quality traits and high yield even as source or breeding material for pest and disease resistance. Rice is an important staple food crop that feeds over half of the global population and has become the cereal that provides a major source of calories for the urban and rural poor in Africa. This study tries to analyze the production situation and production efficiency of rice in different development regions of Nepal.

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