A Single-Nucleotide Polymorphism of TaGS5 Gene Revealed its Association with Kernel Weight in Chinese Bread Wheat

Frontiers in Plant Science
Shasha WangDangqun Cui

Abstract

TaGS5 genes were cloned from bread wheat and were physically mapped on 3AS and 3DS. Sequencing results revealed that a SNP was found in the sixth exon of TaGS5-A1 gene. The SNP resulted in amino acid change from alanine to serine at the 303 bp position of TaGS5-A1. These two alleles were designated as TaGS5-A1a (alanine at the 303 bp position) and TaGS5-A1b genes (serine at the 303-bp position). Analysis of association of TaGS5-A1 alleles with agronomic traits indicated that cultivars with TaGS5-A1b possessed wider kernel width and higher thousand-kernel weight, as well as significantly lower plant height, spike length, and internode length below spike than those of cultivars with TaGS5-A1a over 3 years. These trait differences between TaGS5-A1a and TaGS5-A1b genotypes were larger in landraces than in modern cultivars. This finding suggested that TaGS5 gene played an important role in modulating yield-related traits in the landraces, which possibly resulted from numerous superior genes gathering in modern cultivars after strong artificial selection. The preferred TaGS5-A1b haplotype underwent very strong positive selection in Chinese modern wheat breeding, but not in Chinese landraces. Expression analysis of the TaGS5-A1 gene i...Continue Reading

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Citations

May 7, 2019·Frontiers in Plant Science·Francesca DesiderioElisabetta Mazzucotelli
Nov 16, 2018·Frontiers in Plant Science·Jing LiuTao Wang
Mar 9, 2021·Journal of Experimental Botany·Nicole PretiniFernanda G González

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Methods Mentioned

BETA
PCR

Software Mentioned

SMART
Chromas
IciMapping
DNAMAN
Statistical Analysis System (
Premier

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