P0685
Genetic Diversity and Population Structure in Chickpea Landraces Collected from Secondary Centers of Diversity and Fertile Crescent

Syed Gul Abbas Shah Sani , Quaid-I-Azam University, Islamabad, Pakistan
Kassaye Dinegde , University of California Davis, Davis, CA
Noelia Carrasquilla , University of California-Davis, Davis, CA
Peter Chang , University of Southern California, Los Angeles, CA
Bahattin Tanyolac , Ege University, Izmir, Turkey
Elena Plekhanova , Saint Petersburg State Polytechnical University, Saint Petersburg, Russian Federation
Asnake Fikre , Ethiopian Institute of Agricultural Research, Addis Ababa, Ethiopia
Kassahun Tesfaye , Addis Ababa University, Addis Ababa, Ethiopia
M. Farooq Hussain Munis , Quaid-I-Azam University, Islamabad, Pakistan
Maria Samsonova , Saint Peterberg Polytechnic University, Saint Petersberg, Russian Federation
R. Varma Penmetsa , University of California-Davis, Davis, CA
Sergey V Nuzhdin , University of Southern California, Los Angeles, CA
Eric von Wettberg , Florida International University, Miami, FL
Douglas R Cook , University of California-Davis, Davis, CA
Nina Noujdina , University of Southern California, Los Angeles, CA
Assessment of genetic diversity and genetic framework/structure in plants has important effects for plants breeding programs and the preservation of inherited resources. Little is known about the extent of genetic diversity contained in Chickpea landraces /cultivars and its relation to advanced elite lines. These landraces are among the basic raw materials for chickpea genetic improvement with potential to insure chickpea production against the prevailing climate change threats. Development of high throughput genotyping by sequencing methods opened the possibility for genome-wide characterization of large collections of germ plasm accessions. In this study we used 31,995 SNP markers to estimate the genetic diversity and population structure in a collection of 952 chickpea accessions from Ethiopia, Pakistan and Turkey including landraces, elite materials and cultivated varieties.

We show a decline in diversity in different cultivated gene pools, particularly landraces outside the center of domestication in Turkey. We also find evidence of admixture from modern breeding that combines material from different centers of diversification. Characterizing landraces with dense genome-wide markers lays the groundwork to more effectively utilize existing diversity in a variety of international genebanks.

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