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Genetic Diversity of Cultivated Lentil (Lens culinaris Medik.) and Its Relation to the World's Agro-ecological Zones

Khazaei, Hamid, Caron, Carolyn T., Fedoruk, Michael, Diapari, Marwan, Vandenberg, Albert, Coyne, Clarice J., McGee, Rebecca, Bett, Kirstin E.
Frontiers in plant science 2016 v.7 no.1093 pp. 1-7
Lens culinaris, USDA, agroecological zones, breeding, cluster analysis, genetic improvement, genetic variation, genome, germplasm, germplasm conservation, lentils, pedigree, population structure, provenance, savannas, single nucleotide polymorphism, South Asia
Assessment of genetic diversity and population structure of germplasm collections plays a critical role in supporting conservation and crop genetic enhancement strategies. We used a cultivated lentil (Lens culinaris Medik.) collection consisting of 352 accessions originating from 54 diverse countries to estimate genetic diversity and genetic structure using 1194 polymorphic single nucleotide polymorphism (SNP) markers which span the lentil genome. Using principal coordinate analysis, population structure analysis and UPGMA cluster analysis, the accessions were categorized into three major groups that prominently reflected geographical origin (world’s agro-ecological zones). The three clusters complemented the origins, pedigrees and breeding histories of the germplasm. The three groups were a) South Asia (sub-tropical savannah), b) Mediterranean and c) northern temperate. Our results also indicate that ICARDA and USDA core collection possess the highest levels of genetic diversity, while surveyed South Asian and Canadian germplasm revealed narrow genetic diversity.