Genetic Diversity of Micro-core Collections of Chinese Winter Wheat
CHEN Xiaojie
ZHANG Jianwei
YANG Baoan
FAN Jialin
ZHANG Fuyan
CHENG Zhongjie
HU Yingang
Abstract：In order to know the genetic diversity of Chinese winter wheat,and to provide useful informa-tion for wheat breeding,90 typical accessions of Chinese winter wheat were selected as research materials, which were planted in normal and drought conditions for two years. The genetic variations and broad sense heritability of 21 wheat traits were analyzed. The results showed that 16 traits had abundant genetic varia-tions(CVg > 10% ) except 5 traits( SL,SN,Pn,Ci and SPAD; CVg < 10% ); the simple traits mainly composed of morphological traits(SDL,UIL,PH,CL,RD,TKW,SL,SPAD,GNPS,SN,RL and FLL) had relatively higher heritability,which were available to be selected in early generations. The yield traits(BY-PP and GYPP) had medium heritability,which were considered to be reliable indexes in early generations as they were the core goal in wheat breeding. Photosynthetic and other complex traits(Pn,E,Gs,Ci,RS and RV) were of low heritability,especially the photosynthetic traits which were easily influenced by the environment and could not be evaluated accurately,thus they were unsuitable to be selected in early gen-erations. All the 90 wheat accessions were analyzed with 269 SSR markers distributing throughout the wheat genome. The result showed that the genetic diversity of the Chinese winter wheat accessions was at a lower level. Significant difference of genetic diversity was observed among the three genomes,of which the B genome showed the highest diversity and the D the lowest.
Keywords：Chinese winter wheatgermplasmgenetic variationbroad sense heritabilitySSR markergenetic diversity
Publication Date：2015-04-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 14-20 )