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:: Volume 7, Issue 1 (2020) ::
pgr 2020, 7(1): 47-62 Back to browse issues page
Study of Genetical Correlation and Diversity of Morphological Traits Induced in Rice (Oryza sativa L.) Mutant Population of Hashemi Cultivar
Leila Khazaie , Reza Shirzadian Khoramabad * , Ali-Akbar Ebadi , Ali Moumeni
Department of Agricultural Biotechnology, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran , r.shirzadian@guilan.ac.ir
Abstract:   (8657 Views)
Mutagenesis has been one of the important sources of genetic diversity and Plant mutants can be important bio-resources for crop breeding and functional genomics studies. Breeding conventional methods for generating of genetic variability are of low efficiency. We showed that treatment of seeds of rice(Hashemi cultivar) with 0.8% EMS for 8 h caused visible phenotypic variations on M2 rice mutant genotypes including flowering date, plant height, number of fertile tiller, panicle length, number of filled and unfilled grains per panicle, grain width and length, 100 grain weight and grain yield. The phenotypic variation coefficients of most traits found to be more than the genetic variation coefficients. The number of filled grains per panicle and seed length had the highest and lowest general heritability, respectivly. The seed yield had also high heritability. Analysis of correlation between different characteristics in the mutant genotypes showed that the number of fertile tillers and the number of unfilled grains per panicle had positive correlation with yield. Also, grain yield exhibited positive and significant correlation with panicle length, number of tillers and number of filled grains at genotypic level. In multiple regression analysis by stepwise method, number of tillers, number of filled grains per panicle, 100-grain weight, and grain width entered into the model, respectively, that explained 96 percent of grain yield variations. Results of grain yield and its components path coefficient analysis showed that the number of tiller had the highest direct effect (0.77) through than other traits on grain yield and, therefore it can be considered as major trait in grain yield improvement in rice. Also, based on results of this research and by using optimal selection index, mutant genotypes EM 18-17-5 and EM 15-14-1 were selected as superior mutant genotypes. This mutant population is expected to be serves as a genetical resource for understanding rice biology as well as for use in genetic improvement of quantitative traits.
Keywords: Rice, Genetics variability, Mutation, Index, Concentration, EMS
Full-Text [PDF 674 kb]   (1516 Downloads)    
Type of Study: Research | Subject: Population genetics
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Khazaie L, Shirzadian Khoramabad R, Ebadi A, Moumeni A. Study of Genetical Correlation and Diversity of Morphological Traits Induced in Rice (Oryza sativa L.) Mutant Population of Hashemi Cultivar. pgr 2020; 7 (1) :47-62
URL: http://pgr.lu.ac.ir/article-1-139-en.html


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Volume 7, Issue 1 (2020) Back to browse issues page
پژوهش های ژنتیک گیاهی Plant Genetic Researches
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