scholarly journals GENETIC DIVERSITY ANALYSIS IN RICE (Oryza sativa L.)

2012 ◽  
Vol 25 (1) ◽  
pp. 31-39
Author(s):  
S. P. Chakma ◽  
H. Huq ◽  
F. Mahmud ◽  
A. Husna
Keyword(s):  
Genetic Diversity ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Grain Weight ◽  
Canonical Variate ◽  
Potential Donor ◽  
Mean Values ◽  
Cluster Distance ◽  
Rice Genotypes ◽  
1000 Grain Weight

The experiment was conducted under the agro-ecological zone of Modhupur Tract (AEZ-28) to determine the genetic diversity among 39 rice genotypes, collected from Bangladesh Rice Research Institute, Lal Teer Seed Ltd. and Chittagong Hill Tracts. The genotypes were grouped into six clusters based on Mahalanobis’s D2 statistics and Canonical Variate Analysis. Cluster I consisted with the highest number of (11) genotypes from different origin, whereas cluster IV consisted with the lowest number of (3) genotypes. Cluster III consisted of BRRI dhan 28, BRRI dhan 45, Gold, Tia, Dowel and Moyna showed maximum mean yield. Maximum inter cluster distance was recorded between cluster II and cluster III. The highest inter genotypic distance was observed between Tharak dhan and BRRI dhan 45. Cluster III had the highest mean values for grain yield, harvest index, 1000-grain weight and number of effective tillers per hill and cluster V for number of primary branches per panicle and cluster VI for number of filled grains per panicle that had significant positive correlation with grain yield. Number of unfilled grains per panicle, 1000-grain weight and grain yield showed maximum contribution towards genetic divergence. The genotypes from these clusters with desirable characters may be used as potential donor for future hybridization program to develop high yielders.DOI: http://dx.doi.org/10.3329/bjpbg.v25i1.17010

scholarly journals Genetic Diversity of Bacterial Blight Resistant Rice (Oryza sativa L.) Genotypes from INGER

2020 ◽  
Vol 23 (2) ◽  
pp. 59-64
Author(s):  
F Akter ◽  
MZ Islam ◽  
A Akter ◽  
SK Debsharma ◽  
A Shama ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Bacterial Blight ◽  
Oryza Sativa L ◽  
Mean Value ◽  
Grain Weight ◽  
Yield Potential ◽  
Growth Duration ◽  
Panicle Number ◽  
Cluster Distance ◽  
1000 Grain Weight

Genetic diversity of 65 rice genotypes was studied from IRBBN (International Rice Bacterial Blight Nursery) of INGER (International Network for Genetic Evaluation of Rice) materials through Mahalanobis D2 statistic for grain yield and yield contributing characters. The genotypes were grouped into five clusters. The inter-cluster distances were higher than intra-cluster distances indicating wider genetic diversity among the genotypes of different clusters. The intra-cluster distances were lower in all the cases reflecting homogeneity of the genotypes within the clusters. The cluster III contained the highest number of genotypes (23) and the clusterv contained the lowest (8). The highest intra-cluster distance was noticed for the cluster I and lowest for cluster III. The highest inter-cluster distance was observed between cluster I and V, followed by cluster IV and V, cluster II andV and the lowest between cluster I and IV. Regarding inter-cluster distance, the genotypes of cluster V showed high genetic distance from all other clusters. The genotypes from cluster V could be hybridized with the genotypes of other clusters for producing transgressive segregants. Based on canonical vector analysis, panicle number per plant had maximum contribution towards genetic divergence. The highest cluster means for yield, grain/panicle and spikelet fertility were obtained from cluster V. The highest means for 1000 grain weight, second higher yield and the lowest growth duration were found in cluster II, while the lowest mean value for yield and 1000 grain weight and higher mean value for growth duration were found in cluster IV. The crosses between the genotypes/parents of cluster V and cluster II, cluster V and cluster I would exhibit high heterosis as well as higher level of yield potential. Therefore, more emphasis should be given for selection of the genotypes from clusters II and V for future breeding programme. Bangladesh Rice j. 2019, 23(2): 59-64

scholarly journals Genetic divergence analysis in basmati rice genotypes (Oryza sativa L.) for agro-morphological and quality traits using multivariate approach

2021 ◽  
Vol 58 (1) ◽  
pp. 1-7
Author(s):  
Vinod Kumar ◽  
Dhirendra Singh
Keyword(s):  
Genetic Divergence ◽  
Amylose Content ◽  
Oryza Sativa L ◽  
Grain Weight ◽  
Basmati Rice ◽  
Quality Traits ◽  
Grain Length ◽  
Cluster Distance ◽  
Rice Genotypes ◽  
1000 Grain Weight

Genetic diversity of 30 basmati rice genotypes was analysed based on nine agro-morphological and six quality traits. The results of the principal component analysis showed that the first six principal components explained 89.16% of the total variation in the experimental material. These 30 basmati genotypes were grouped into six clusters which indicated the presence of sufficient diversity among the tested genotypes. Cluster I and cluster III was found to be the largest comprising of 10 genotypes each followed by cluster II having seven genotypes. The highest average intra-cluster distance was observed in cluster III. Highest inter-cluster distance (D2) was observed between clusters III and VI followed by clusters III and V, III and IV & clusters II and III. Cluster II showed high mean value for grain yield per plant, 1000 grain weight, and grain length. The characters viz., amylose content, grain length after cooking, spikelet per panicle, grain width, grain length and 1000 grain weight contributed maximum towards total genetic divergence, suggest their suitability of selection.

scholarly journals GENETIC DIVERSITY IN LOCAL BORO RICE (Oryza sativa L.) GENOTYPES OF BANGLADESH

2013 ◽  
Vol 26 (1) ◽  
pp. 19-24 ◽  
Author(s):  
M. A. Siddique ◽  
M. Khalequzzaman ◽  
M. Z. Islam ◽  
M. S. Ahamed ◽  
E. S. M. H. Rashid
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa L ◽  
Flag Leaf ◽  
Leaf Length ◽  
Grain Weight ◽  
Growth Duration ◽  
Cluster Distance ◽  
Flag Leaf Length ◽  
1000 Grain Weight ◽  
Boro Rice

Genetic diversity in 40 traditional boro rice genotypes was studied under irrigated condition through Mahalanobis D2 statistic for grain yield and yield contributing characters. The genotypes were grouped into five clusters. The inter-cluster distances were higher than intra-cluster distances indicating wider genetic diversity among the clusters. The intra-cluster distances were lower in all the cases reflecting homogeneity of the genotypes within the clusters. The cluster IV contained the highest number of genotypes (22) and the cluster II and V contained the lowest (1). The highest intra-cluster distance was noticed for the cluster III and lowest for cluster II and V. The highest inter-cluster distance was observed between cluster II and III followed by cluster II and V, cluster I and II and the lowest between cluster I and IV. Regarding inter-cluster distance, the genotypes of cluster II   showed high genetic distance from all other clusters. The genotypes from cluster II could be hybridized with the genotypes of other clusters for producing transgressive segregants. Based on positive value of vector 1 and vector 2, panicle/hill had maximum contribution towards genetic divergence. The highest cluster means for yield, flag leaf length and grain length breadth ratio were obtained from cluster IV. The highest 1000-grain weight, shortest growth duration and grain breadth were found in cluster II while the lowest mean value for yield, flag leaf length, filled grains and 1000 grain weight were found in cluster V.  Therefore, more emphasis should be given on cluster II, III and cluster IV for selecting genotypes as parents for crossing with the genotypes of cluster V which would be used to produce new recombinants with desired traits.DOI: http://dx.doi.org/10.3329/bjpbg.v26i1.19980

scholarly journals Growth and Productivity Assessment of Short-Duration Rice (Oryza sativa L. and Upland NERICA) Genotypes in Semiarid North-Central Namibia

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Simon K. Awala ◽  
Kudakwashe Hove ◽  
Vistorina Shivute ◽  
Johanna S. Valombola ◽  
Pamwenafye I. Nanhapo ◽  
...  
Keyword(s):  
Grain Yield ◽  
Short Duration ◽  
Oryza Sativa L ◽  
Grain Weight ◽  
Growth And Yield ◽  
Shoot Biomass ◽  
Cloudy Weather ◽  
Early Maturing ◽  
Rice Genotypes ◽  
1000 Grain Weight

In semiarid regions, drought is the major threat to crop production, but climate change and variability often bring floods to the regions, forming seasonal wetlands causing damage to local, drought-adapted staple grains and, hence, low yields and food deficit. Introduction of the semiaquatic crop rice (Oryza spp.) to these semiarid wetlands could complement the dryland crop low yields and overcome the food shortage problem. A field experiment was carried out at the University of Namibia-Ogongo Campus during the 2016/2017 and 2017/2018 cropping seasons to assess the growth and yield of rice genotypes. Twelve short-duration rice genotypes, nine from the International Rice Research Institute (IRRI) and three locally grown upland NERICA genotypes, were used. Parametric analysis of variance was performed to test their effects on crop growth and yield characters. The results showed significant genotype by year interaction for days to heading, plant height, the number of tillers per m2, shoot biomass, the number of panicles per m2, 1000-grain weight, harvest index, and grain yield. The IRRI genotypes produced a higher number of tillers, shoot biomass, and grain yield than the NERICA ones, which were early maturing, were taller, and had higher 1000-grain weight across the years. Generally, most of the genotypes had lower grain yield and higher shoot biomass in the first year, due to the prevailing cool, rainy, and seemingly cloudy weather conditions associated with lower temperature and lower solar radiation. Grain yield was positively correlated with most characters but negatively correlated with the 1000-grain weight. These results demonstrate the yield superiority of IRRI genotypes over their early-maturing NERICA counterparts. However, further studies on morphological characters and drought tolerance of the IRRI genotypes are warranted to ascertain production sustainability under semiarid environments.

scholarly journals Genetic diversity of aromatic rice in Bangladesh

2017 ◽  
Vol 4 (1) ◽  
pp. 1-6
Author(s):  
Md Mizan Ul Islam ◽  
Parth Sarothi Saha ◽  
Tusher Chakrobarty ◽  
Nibir Kumar Saha ◽  
Md Sirajul Islam ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Grain Yield ◽  
Agricultural Research ◽  
Maximum Yield ◽  
Appreciable Amount ◽  
Aromatic Rice ◽  
Potential Donor ◽  
Cluster Distance ◽  
Agricultural Research And Development ◽  
Rice Genotypes

The nature and magnitude of diversity in 53 aromatic rice genotypes was evaluated in rain fed condition at BRAC Agricultural Research and Development Centre, Gazipur in 2012. The Euclidian method of divergence analysis indicated the presence of appreciable amount of genetic diversity in the material. These aromatic rice genotypes were grouped into six clusters where cluster I was the largest. Inter-cluster distances were larger than the intra-cluster distance revealed that there situated considerable genetic diversity among the genotypes. Based on positive value of vector I and II days to 50% flowering, seed length, and grain yield per hill had maximum contribution towards genetic divergence. Maximum yield contributing traits were accumulated in cluster V and as a result higher grain yield (42.0 g/hill) was obtained in this cluster. The genotypes of cluster V can be used in hybridization program to produce higher yielding breeding materials with all other clusters. The genotypes Cluster IV and cluster V were found most suitable for the respective characters and can be used as potential donor for future breeding programs.Res. Agric., Livest. Fish.4(1): 1-6, April 2017

scholarly journals Genetic Diversity of Boro Rice (Oryza sativa L.) Landraces in Bangladesh

2016 ◽  
Vol 29 (2) ◽  
pp. 33-40 ◽  
Author(s):  
N. Akter ◽  
M. Z. Islam ◽  
M. A. Siddique ◽  
T. Chakrabarty ◽  
M. Khalequzzaman ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Flag Leaf ◽  
Growth Duration ◽  
Cluster Distance ◽  
Transgressive Segregants ◽  
Rice Genotypes ◽  
1000 Grain Weight ◽  
Boro Rice

Genetic diversity of 45 traditional Bangladeshi boro rice genotypes was studied through Mahalanobis D2 statistics and was grouped into six clusters. The inter-cluster distances were higher than intra-cluster distances indicating wider genetic diversity among the genotypes of different clusters. The intra-cluster distances were lower in all the cases reflecting homogeneity of the genotypes within the cluster. The cluster V contained the highest number of genotypes (14) and the cluster I and VI contained the lowest (4) number. The highest intra-cluster distance was noticed for the cluster VI and the lowest for cluster V. The highest inter-cluster distance was observed between cluster I and VI followed by cluster II and VI, cluster I and V and the lowest between cluster II and IV. The genotypes from cluster VI could be selected as parents for hybridization for producing transgressive segregants. The highest cluster means for yield, grains per panicle and grain length-breath ratio were obtained from cluster I; whereas higher yield, grain breath, 1000 grain weight, flag leaf area, shortest growth duration were obtained from cluster V. Therefore, more emphasis should be given on cluster I, cluster V and cluster VI for selecting genotypes as parents to produce new recombinants with desired traits.

scholarly journals Genetic diversity of yield related traits in a large subset of exotic and indigenous rice germplasm collection maintained at Tamil Nadu Agricultural University gene bank

2021 ◽  
Vol 58 (4) ◽  
pp. 487-495
Author(s):  
K Amudha ◽  
G Ariharasutharsan
Keyword(s):  
Genetic Diversity ◽  
Grain Yield ◽  
Genetic Divergence ◽  
Tamil Nadu ◽  
Geographical Origin ◽  
Germplasm Collection ◽  
Grain Weight ◽  
Rice Germplasm ◽  
Cluster Distance ◽  
Clustering Pattern

The present investigation was carried out to explore the extent of genetic divergence in 95 rice germplasm accessions for twelve characters during kharif, 2018. In D2 analysis, the 95 genotypes were grouped into fifteen clusters. The clustering pattern indicated that there was no parallelism between genetic diversity and geographical origin as the genotypes from same origin were included in different clusters and vice versa. The highest intra cluster distance was registered in cluster V (215.183) followed by cluster IX (209.831), cluster VIII (204.057) and cluster XIV (202.623).The maximum inter cluster distance was observed between cluster II and cluster III (991.049) followed by cluster II and cluster X (974.960), cluster III and cluster XI (963.826), cluster II and XII (962.013), cluster X and cluster XI (932.469) and cluster XI and cluster XII (919.151). Genetically distant parents from those clusters could be able to produce higher heterosis in progenies on hybridization. Grain yield per plant, 100 grain weight and days to 50% flowering were the major contributors towards the total genetic divergence among the genotypes studied. Thus selection could be made based on grain yield per plant, hundred grain weight and days to 50%flowering for the progenies identified.

scholarly journals CHARACTER ASSOCIATION IN F4 GENERATION OF RICE (Oryza sativa L.)

2015 ◽  
Vol 26 (2) ◽  
pp. 39-44 ◽  
Author(s):  
P. K. Rai ◽  
U. K. Sarker ◽  
P. C. Roy ◽  
A. K. M. S. Islam
Keyword(s):  
Grain Yield ◽  
Oryza Sativa L ◽  
Residual Effect ◽  
Grain Weight ◽  
Direct Selection ◽  
Panicle Length ◽  
Spikelet Sterility ◽  
Genetic Components ◽  
1000 Grain Weight ◽  
Hill Number

Twenty five rice genotypes were used to study the genetic components, correlation and path coefficients during Aman season of 2011. Thirteen characters were studied to find out the suitable traits for the improvement of rice yield. Among these characters considerable correlation were observed. Correlation values of grain yield per square meter with plant height, number of tillers per hill, number of panicles per hill, panicle length, number of primary branches, number of filled grain per panicle, spikelet sterility (%), 1000 grain weight and days to flowering revealed that selection based on this traits could significantly be improved the grain yield of rice. Number of tillers per hill, number of panicles per hill, panicle length, number of filled grains per panicle, 1000-grain weight exhibited high direct effect coupled with significant positive correlation on grain yield indicating selection on the basis of these traits would enhanced yield potentiality of rice. The residual effect was found 0.179 which indicated that 82.10% of the variability was accounted for 13 yield and yield contributing traits included in the present study. Rest 17.90% variability might be controlled by other yield contributed traits that was not included in the present investigation. So direct selection based on these traits would be effective for improvement of these F4 materials

scholarly journals Genetic Diversity of Selected Upland Rice Genotypes (Oryza sativa L.) for Grain Yield and Related Traits

2018 ◽  
Vol 22 (5) ◽  
pp. 1-9 ◽  
Author(s):  
Christian Anyaoha ◽  
Felix Adegbehingbe ◽  
Uyokei Uba ◽  
Bosede Popoola ◽  
Vernon Gracen ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Grain Yield ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Rice Genotypes

scholarly journals GENETIC VARIABILITY FOR GRAIN QUALITY TRAITS IN AROMATIC RICE (Oryza sativa L)

2011 ◽  
Vol 24 (2) ◽  
pp. 19-24
Author(s):  
Kaniz Fatema ◽  
M. G. Rasul ◽  
M. A. K. Mian ◽  
M. M. Rahman
Keyword(s):  
Genetic Variability ◽  
Amylose Content ◽  
Oryza Sativa L ◽  
Grain Weight ◽  
Aromatic Rice ◽  
Thousand Grain Weight ◽  
Grain Length ◽  
Gel Consistency ◽  
Rice Genotypes ◽  
1000 Grain Weight

Forty five aromatic rice genotypes were evaluated to assess the genetic variability and diversity on the basis of nine characters. Significant variations were observed among the genotypes for all the characters (grain breadth (mm), grain length (mm), grain L/B ratio, gelatinization temperature (score), gel consistency (mm), amylose content (%), protein content (%), 1000 grain weight (g) and grain yield per plant (g)) studied. High GCV, PCV, heritability and GA as observed in amylose content, grain length average and L/B ratio suggested that these three characters could be transmitted to the progeny. Multivariate analysis revealed that 45 genotypes were grouped into six clusters. There were marked variations in intra-cluster distances, which ranged from 0.482 to 7.851. The highest intra cluster mean for five traits (amylose content, width average, L/B ratio, length average, 1000 grain weight) was obtained from cluster I constituted 10 genotypes. Thousand grain weight and amylose content have been found to contribute maximum towards genetic diversity in 45 genotypes of aromatic rice.DOI: http://dx.doi.org/10.3329/bjpbg.v24i2.17002

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