Functional markers developed from TaGS3, a negative regulator of grain weight and size, for marker-assisted selection in wheat

文献类型： 外文期刊

第一作者： Zhi, Liya

作者： Zhi, Liya;Su, Qiannan;Liu, Jiajia;Ren, Xiaoli;Meng, Deyuan;Zhang, Na;Ji, Jun;Li, Junming;Li, Huifang;Zhang, Xueyong;Zhang, Wei;Zhang, Na;Ji, Jun;Li, Junming;Zhang, Na;Ji, Jun;Li, Junming

作者机构：

关键词： TaGS3; Grain yield; Haplotype; MAS; Triticum aestivum

期刊名称：CROP JOURNAL （ 影响因子：4.407； 五年影响因子：5.687 ）

ISSN： 2095-5421

年卷期： 2020 年 8 卷 6 期

页码：

收录情况： SCI

摘要： The TaGS3 homoeologous genes (homoeologs) located on chromosomes 7A, 4A, and 7D in hexaploid wheat were cloned. Relative expression analysis of the three TaGS3 homoeologs revealed that the expression levels of TaGS3-4A and TaGS3-7D in developing grains were higher than that of TaGS3-7A. Genetic evidence showed that TaGS3 was a negative regulator of grain weight and grain size. Fifteen polymorphic sites and five haplotypes were detected in TaGS3-4A. Two molecular markers were developed to distinguish the five haplotypes. Association analysis using 260 accessions from Chinese wheat mini-core collection (MCC) indicated that TaGS3-4A affected thousand grain weight (TGW) and grain length (GL). HAP-4A-1 and HAP-4A-2 were favorable haplotypes that increased TGW and GL and had undergone strong selection during domestication of wheat. In addition, interaction of the TaGS3-4A and TaGS3-7D homoeologs had significant additive effects on the grain traits. Hap-4A-1/Hap-7D-2 was the best haplotype combination in increasing TGW and GL. The frequencies and geographic distributions of favorable TaGS3 haplotypes among 1388 wheat accessions from worldwide sources provided clues for selection of yield-related traits. Our findings demonstrated that TaGS3-4A had significant effects on TGW and GL. Marker-assisted selection of HAP-4A-1/2 combined with HAP-7D-2 has potential to increase wheat yields. (C) 2020 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.

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