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首页> 中文期刊> 《农业科学学报（英文版）》 >Polymorphism and association analysis of a drought-resistant gene TaLTP-sin wheat

Polymorphism and association analysis of a drought-resistant gene TaLTP-sin wheat

         
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摘要

Lipid transfer protein (LTP) is a kind of smal molecular protein, which is named for its ability to transfer lipid between cel membranes. It has been proved that the protein is involved in the responding to abiotic stresses. In this study,TaLTP-s, a genomic sequence ofTaLTP was isolated from A genome of wheat (Triticum aestivumL). Sequencing analysis exhibited that there was no diversity in the coding region ofTaLTP-s, but seven single nucleotide polymorphisms (SNPs) and 1 bp insertion/deletion (InDel) were detected in the promoter regions of different wheat accessions. Nucleotide diversity (π) in the region was 0.00033, and linkage disequilibrium (LD) extended over almost the entireTaLTP-sregion in wheat. The dCAPS markers based on sequence variations in the promoter regions (SNP-207 and SNP-1696) were developed, and three haplotypes were identiifed based on those markers. Association analysis between the haplotypes and agronomic traits of natural population consisted of 262 accessions showed that three haplotypes ofTaLTP-s were signiifcantly associated with plant height (PH). Among the three haplotypes,HapIII is considered as the superior haplotype for increasing plant height in the drought stress environments. The G variance at the position of 207 bp could be a superior alele that signiifcantly increased number of spikes per plant (NSP). The functional marker ofTaLTP-s provide a tool for marker-assisted selection regarding to plant height and number of spikelet per plant in wheat.

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  • 来源
    《农业科学学报（英文版）》 |2016年第6期|1198-1206|共9页
  • 作者

    LI Qian; WANG Jing-yi; Nadia Khan; CHANG Xiao-ping; LIU Hui-min; JING Rui-lian;

  • 作者单位

    National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China;

    National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China;

    National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China;

    National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China;

    Colege of Bioengineering, Shanxi University, Taiyuan 030006, P.R.China;

    National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China;

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