关键词:普通小麦; puroindoline b-2基因; 产量相关性状; 旗叶大小; 基因定位 Analysis of Association ofpuroindoline b-2 Alleles with Yield-Related Traits in Bread Wheat CHEN Feng, LI Xiang-Nan, CAO Ying-Ying, SUN Jian-Xi, ZHANG Fu-Yan, DONG Zhong-Dong, CUI Dang-Qun* Agronomy College / Collaborative Innovation Center of Henan Grain Crops, Henan Agricultural University, Zhengzhou 450002, China
AbstractGenespuroindoline b-2 (Pinb-2) were recently discovered and possess high similarity withpuroindoline b gene. We have identified severalPinb-2 alleles in B genome of bread wheat (Triticum aestivum L.) and found association between allelic variation onPinb-2 and grain texture in soft wheat. In this study, we analyzed the association between thePinb-2 alleles and yield-related traits and flag leaf size, and mapped thePinb-2 locus using a recombinant inbred line (F8) population. Among the fourPinb-2 genotypes,Pinb-2v3b genotype possessed the highest 1000-grain weight, grain diameter, grain number per spike, grain weight per spike, and grain weight per plant. Therefore,Pinb-2v3b genotype possibly has more preferable yield-related traits thanPinb-2v2,Pinb-2v3a, andPinb-2v3c genotypes. Additionally,Pinb-2v3a genotype possessed the highest flag leaf width, length, and area. Genetic mapping indicated thatPinb-2 was located on the long arm of chromosome 7B close to SSR markerBarc315. This result provides basic information for use ofpuroindoline b-2 genes in molecular genetics research and breeding.
Keyword:Bread wheat; puroindoline b-2 genes; Yield-related traits; Flag leaf size; Genetic mapping Show Figures Show Figures
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