Analysis of Genetic Diversity of Sweetpotato Landraces in China
Genetic diversity of 176 sweetpotato landraces from 17 provinces in China was analyzed using morphological traits.The accessions from the same origins were clustered into different groups,indicating that there was no direct relationship between genetic diversity and geographical origins.176 landraces could be divided into five groups by UPGMA cluster based on euclidean distance.And two pairs of duplicate accessions were found.The quality characters of 133 landraces were identified.11 accessions with high dry matter content and high starch content were screened,in which Baopiwang from Guangdong was the highest one with 34.87％ dry matter content and 23.32％ starch content of fresh sweetpotato respectively.The 11 landraces with soluble sugar content of fresh sweetpotato ≥4.00％ were screened,of which a landrace Tengchongbendizhong from Yunnan was the highest with the content of 5.22％.And 2 landraces were screened with high raw protein content.The 133 landraces were clustered into five groups based on quality traits.The group Ⅰ was mainly composed with the landraces with low starch and protein content,high soluble sugar content.The group Ⅱ included 28 landraces with high soluble sugar content,low dry matter and raw protein content.There was only 1 accession with the highest soluble sugar content in the group Ⅲ.The group Ⅴ included 4 landraces from Guangdong with high starch content.The rest of the 86 landraces constituted the group Ⅳand the quality traits of these accessions had no obvious regularity.The genetic diversity analysis of sweetpotato landraces germplasm could provide reference for selecting parents in sweetpotato breeding and promote utilization and innovation of sweetpotato industry in China.
NETL
NSTL
万方数据
维普
