Genetic Diversity and Population Structure in Landraces and Improved Rice Varieties from India
Received date: 2014-10-05
Accepted date: 2015-02-11
Online published: 2015-03-27
A set of 50 rice genotypes comprising landraces, local selections, and improved varieties were characterized using simple sequence repeat (SSR) and inter simple sequence repeat (ISSR) markers to study genetic diversity and population structure. Following unweighted pair group method with arithmetic mean based clustering using binary data of polymorphic markers, the genotypes were grouped into 5 clusters and 11 sub-clusters, whereas population structure analysis separated 50 rice genotypes into 5 sub-populations. Grouping of rice genotypes showed better resemblance with the pedigree information of the genotypes. Both genetic diversity and population structure analysis separated majority of the improved varieties from landraces and local selections. Some of the SSR markers amplified unique alleles which were specific to a particular genotype and could distinguish them from the rest. The results indicate that these rice genotypes exhibit a higher genetic diversity and can be very useful in rice improvement program.
D. Kumbhar Shailesh, L. Kulwal Pawan, V. Patil Jagannath, D. Sarawate Chandrakant, P. Gaikwad Anil, S. Jadhav Ashok . Genetic Diversity and Population Structure in Landraces and Improved Rice Varieties from India[J]. Rice Science, 2015 , 22(3) : 99 -107 . DOI: 10.1016/S1672-6308(14)60287-0
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