Genetic diversity and population structure of eddoe taro in China using genome-wide SNP markers

PeerJ

article

Zhixin Wang¹  Yalin Sun¹  Xinfang Huang¹  Feng Li¹  Yuping Liu¹  Honglian Zhu¹  Zhengwei Liu¹  Weidong Ke¹ 

[1] Wuhan Academy of Agricultural Sciences

关键词: Colocasia esculenta;    Genetic diversity;    Population structure;    Core germplasm;    SNP;   

DOI  :  10.7717/peerj.10485

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Taro (Colocasia esculenta) is an important root and tuber crop cultivated worldwide. There are two main types of taro that vary in morphology of corm and cormel, ‘dasheen’ and ‘eddoe’. The eddoe type (Colocasia esculenta var. antiquorium) is predominantly distributed throughout China. Characterizing the genetic diversity present in the germplasm bank of taro is fundamental to better manage, conserve and utilize the genetic resources of this species. In this study, the genetic diversity of 234 taro accessions from 16 provinces of China was assessed using 132,869 single nucleotide polymorphism (SNP) markers identified by specific length amplified fragment-sequencing (SLAF-seq). Population structure and principal component analysis permitted the accessions to be categorized into eight groups. The genetic diversity and population differentiation of the eight groups were evaluated using the characterized SNPs. Analysis of molecular variance showed that the variation among eight inferred groups was higher than that within groups, while a relatively small variance was found among the two morphological types and 16 collection regions. Further, a core germplasm set comprising 41 taro accessions that maintained the genetic diversity of the entire collection was developed based on the genotype. This research is expected to be valuable for genetic characterization, germplasm conservation, and breeding of taro.

【 授权许可】

CC BY