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Position: Home > Articles > Polymorphism and association analysis of a drought-resistant gene TaLTP-s in wheat Journal of Integrative Agriculture 2016,15 (6)

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

作者：

Li Qian;Wang Jing-Yi;Khan, Nadia;Chang Xiao-ping;Liu Hui-min;Jing Rui-lian

单位：

Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China;Shanxi Univ, Coll Bioengn, Taiyuan 030006, Peoples R China

关键词：

Triticum aestivum L.;TaLTP;single nucleotide polymorphism;association analysis;plant height

摘要：

Lipid transfer protein (LTP) is a kind of small molecular protein, which is named for its ability to transfer lipid between cell membranes. It has been proved that the protein is involved in the responding to abiotic stresses. In this study, TaLTP-s, a genomic sequence of TaLTP was isolated from A genome of wheat (Triticum aestivum L). Sequencing analysis exhibited that there was no diversity in the coding region of TaLTP-s, but seven single nucleotide polymorphisms (SNPs) and 1 by insertion/deletion (InDel) were detected. in the promoter regions of different wheat accessions. Nucleotide diversity (pi) in the region was 0.00033, and linkage disequilibrium (LD) extended over almost the entire TaLTP-s region in wheat. The dCAPS markers based on sequence variations in the promoter regions (SNP-207 and SNP-1696) were developed, and three haplotypes were identified based on those markers. Association analysis between the haplotypes and agronomic traits of natural population consisted of 262 accessions showed that three haplotypes of TaLTP-s were significantly 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 by could be a superior allele that significantly increased number of spikes per plant (NSP). The functional marker of TaLTP-s provide a tool for marker-assisted selection regarding to plant height and number of spikelet per plant in wheat.

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

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