Analysis of genetic diversity and population structure of peanut cultivars and breeding lines from China, India and the US using simple sequence repeat markers
Citation
Hui Wang, Pawan Khera, Bingyan Huang, Mei Yuan, Ramesh Katam, Weijian Zhuang, Karen R Harris-Shultz, Kim M. Moore, Albert K. Culbreath, Xinyou Zhang, Rajeev Varshney, Lianhui Xie, Baozhu Guo. (31/5/2016). Analysis of genetic diversity and population structure of peanut cultivars and breeding lines from China, India and the US using simple sequence repeat markers. Journal of Integrative Plant Biology, 58 (5), pp. 452-465.
Abstract
Cultivated peanut is grown worldwide as richsource
of oil and protein. A broad genetic base is needed for
cultivar improvement. The objectives of this study were to
develop highly informative simple sequence repeat (SSR)
markers and to assess the genetic diversity and population
structure of peanut cultivars and breeding lines from different
breeding programs in China, India and the US. A total of 111 SSR
markers were selected for this study, resulting in a total of 472
alleles. The mean values of gene diversity and polymorphic
information content (PIC) were 0.480 and 0.429, respectively.
Country-wise analysis revealed that alleles per locus in three
countries were similar. The mean gene diversity in the US,
China and India was 0.363, 0.489 and 0.47 with an average PIC
of 0.323, 0.43 and 0.412, respectively. Genetic analysis using
the STRUCTURE divided these peanut lines into two
populations (P1, P2), which was consistent with the dendrogram
based on genetic distance (G1, G2) and the clustering of
principal component analysis. The groupings were related to peanut market types and the geographic origin with a
few admixtures. The results could be used by breeding
programs to assess the genetic diversity of breeding materials
to broaden the genetic base and for molecular genetics
studies.
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