Population Structure Analysis and Selection of Core Set among Common Bean Genotypes from Jammu and Kashmir, India.
Understanding the genetic diversity of a crop is useful for its effective utilization in breeding programmes. For better understanding of the genetic variability in common bean, the first and foremost step is to study its genetic diversity. In the present investigation, 138 genotypes of common bean collected from various regions of Jammu and Kashmir, India, representing major common bean growing areas of this region, were evaluated using 23 SSRs. These SSRs were found highly polymorphic and possess high values for various parameters indicating their high discriminatory power. The average PIC value observed was 0.692, with 0.730 as average gene diversity value, and 0.267 as heterozygosity. Twenty-three SSRs produced a total of 251 alleles. The dendrogram generated with un-weighted neighbour joining cluster analysis grouped genotypes into three main clusters with various degrees of sub-clustering within the clusters. The model-based STRUCTURE analysis using 23 SSR markers identified a population with 3 sub-populations which corresponds to distance-based groupings with average FSTvalue and expected heterozygosity of 0.1497 and 0.6696, respectively, within the sub-population, as such high level of genetic diversity was observed within the population. Further, Core Hunter II was used to identify a core set of 96 diverse genotypes. This core set of diverse 96 genotypes is a potential resource for association mapping studies and can be used by breeders as a material to make desirable genetic crosses to generate elite varieties for the fulfilling global market needs. These findings have further implications in common bean breeding as well as conservation programs.
School of Biotechnology, S K University of Agricultural Sciences and Technology of Jammu, Chatha, Jammu, Jammu and Kashmir, 180009, India.
Reetika
R
Mahajan
Division of Biotechnology, S K University of Agricultural Sciences and Technology of Kashmir, Shalimar, Srinagar, Jammu and Kashmir, 190025, India. smzargar@gmail.com.
Sajad Majeed
SM
Zargar
School of Biotechnology, S K University of Agricultural Sciences and Technology of Jammu, Chatha, Jammu, Jammu and Kashmir, 180009, India.
Ravinder
R
Singh
School of Biotechnology, S K University of Agricultural Sciences and Technology of Jammu, Chatha, Jammu, Jammu and Kashmir, 180009, India.
Romesh Kumar
RK
Salgotra
School of Biotechnology, S K University of Agricultural Sciences and Technology of Jammu, Chatha, Jammu, Jammu and Kashmir, 180009, India.
Sufia
S
Farhat
Départment de phytologie-FSAA, Université Laval, Québec, QC, G1V 0A6, Canada.
Humaira
H
Sonah
D000483:Alleles; D002874:Chromosome Mapping; D005819:Genetic Markers; D014644:Genetic Variation; D005828:Genetics, Population; D018745:Genome, Plant; D005838:Genotype; D006579:Heterozygote; D007194:India; D018895:Microsatellite Repeats; D005810:Multigene Family; D027805:Phaseolus / Q000235:genetics*; D000069600:Plant Breeding; D025341:Principal Component Analysis; D012641:Selection, Genetic
D005819:Genetic Markers
Core collection; Gene diversity; Genetic diversity; Heterozygosity; Jammu and Kashmir; Phaseolus vulgaris L.; Population structure; Simple sequence repeats