132 Sweetpotato Landraces:Genetic Diversity and Population Structure
Understanding the genetic diversity and population structure of sweetpotato landraces in China is helpful for the protection of sweetpotato germplasm resources and the cultivation of new varieties.In this study,132 sweet potato landraces were used as materials to analyze the genetic diversity and population structure of phenotypic traits,carotenoid content,and SSR molecular markers.The results showed that the average coefficient of variation of phenotypic traits of 132 sweetpotato landraces was 45.84％,the average carotenoid content was 6.33 μg/g,and the highest was 59.90 μg/g.The average Nei's diversity index of SSR molecular markers was 0.15,and the average Shannon's diversity index was 0.23.Based on the population structure analysis,the 132 sweetpotato landraces were divided into five subpopulations.Further analysis of molecular variation revealed that 84％of the variation existed within populations and 16％between populations.In summary,sweetpotato landraces have rich genetic diversity,and the genetic variation among germplasms is mainly concentrated within the subpopulation.This provides important information for the protection of local sweetpotato germplasm resources and the cultivation of new varieties in China.
NETL
NSTL
万方数据
