Investigation of genetic diversity and population structure of common wheat cultivars in northern China using DArT markers

BMC Genetics

Research Article

XiaoLi Guo¹  AiMin Zhang²  DongCheng Liu²  WenLong Yang²  DaoWen Wang²  JiaZhu Sun²  LiYi Zhang³  Pierre Sourdille⁴ 

[1] College of Biological Sciences, China Agricultural University, Beijing, China;The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China;The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China;Guizhou Institute of Dryland Crops, Guizhou Academy of Agricultural Sciences, Guiyang, China;UMR INRA-UBP Amélioration et Santé des Plantes, Clermont-Ferrand Cedex 2, France;

关键词: Amplify Fragment Length Polymorphism;    Wheat Cultivar;    Common Wheat;    Polymorphism Information Content;    Hebei Province;   

DOI  :  10.1186/1471-2156-12-42

 received in 2010-10-06, accepted in 2011-05-11,  发布年份 2011

来源: Springer

【 摘 要 】

BackgroundIn order to help establish heterotic groups of Chinese northern wheat cultivars (lines), Diversity arrays technology (DArT) markers were used to investigate the genetic diversity and population structure of Chinese common wheat (Triticum aestivum L.).ResultsIn total, 1637 of 7000 DArT markers were polymorphic and scored with high confidence among a collection of 111 lines composed mostly of cultivars and breeding lines from northern China. The polymorphism information content (PIC) of DArT markers ranged from 0.03 to 0.50, with an average of 0.40, with P > 80 (reliable markers). With principal-coordinates analysis (PCoA) of DArT data either from the whole genome or from the B-genome alone, all lines fell into one of two major groups reflecting 1RS/1BL type (1RS/1BL and non-1RS/1BL). Evidence of geographic clustering of genotypes was also observed using DArT markers from the A genome. Cluster analysis based on the unweighted pair-group method with algorithmic mean suggested the existence of two subgroups within the non-1RS/1BL group and four subgroups within the 1RS/1BL group. Furthermore, analysis of molecular variance (AMOVA) revealed highly significant (P < 0.001) genetic variance within and among subgroups and among groups.ConclusionThese results provide valuable information for selecting crossing parents and establishing heterotic groups in the Chinese wheat-breeding program.

【 授权许可】

CC BY   
© Zhang et al; licensee BioMed Central Ltd. 2011