文献类型： 外文期刊

作者： Chen, Huangxin ¹ ; Wei, Jiatai ² ; Tian, Rong ² ; Zeng, Zhaoyong ² ; Tang, Huaping ² ; Liu, Yanlin ² ; Xu, Qiang ² ; Deng, Mei ² ; Jiang, Qiantao ¹ ; Chen, Guoyue ¹ ; Liu, Yaxi ¹ ; Li, Wei ³ ; Qi, Pengfei ¹ ; Jiang, Yunfeng ¹ ; Jiang, Yun ⁴ ; Tang, Liwei ⁵ ; Wei, Yuming ¹ ; Zheng, Youliang ² ; Lan, Xiujin ¹ ; Ma, Jian ¹ ;

作者机构： 1.Sichuan Agr Univ, State Key Lab Crop Gene Explorat & Utilizat Southw, Chengdu, Peoples R China

2.Sichuan Agr Univ, Triticeae Res Inst, Chengdu, Peoples R China

3.Sichuan Agr Univ, Coll Agron, Chengdu, Peoples R China

4.Sichuan Acad Agr Sci, Inst Biotechnol & Nucl Technol Res, Chengdu, Peoples R China

5.Panzhihua Acad Agr & Forestry Sci, Panzhihua, Peoples R China

关键词： total root length; quantitative trait loci; wheat; Wheat55K SNP array; parental reproductive environment; precipitation

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）

ISSN： 1664-462X

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： Optimizing root system architecture (RSA) allows crops to better capture water and nutrients and adapt to harsh environment. Parental reproductive environment (PRE) has been reported to significantly affect growth and development throughout the life cycle of the next generation. In this study, 10 RSA-related traits were evaluated in seedling stage from five independent hydroponic tests using seeds harvested from five different PREs. Based on the Wheat55K SNP array-based genetic map, quantitative trait loci (QTL) for these traits were detected in a recombinant inbred line population. Twenty-eight putative QTL for RSA-related traits were detected, covering thirteen chromosomal regions. A major QTL, QTrl.sicau-2SY-4D for total root length (TRL), which was likely independent of PREs, explained 15.81-38.48% of phenotypic variations and was located at 14.96-19.59 Mb on chromosome arm 4DS. Interestingly, it showed pleiotropic effects on TRL, root area, root volume, root forks, root dry weight, and shoot dry weight. The functional marker KASP-Rht-D1 for Rht-D1 was used to genotype 2SY population and remapping QTL for TRL showed that QTrl.sicau-2SY-4D was not linked to Rht-D1. The kompetitive allele-specific PCR (KASP) marker, KASP-AX-110527441 linked to this major QTL, was developed and used to successfully validate its effect in three different genetic populations. Further analysis suggested that the positive allele at QTrl.sicau-2SY-4D was mainly utilized in wheat breeding of northwest China where precipitation was significantly lower, indicating that wheat requires longer TRL to capture water and nutrients in arid or semi-arid regions due to deficient precipitation. Additionally, four genes (TraesCS4D03G0059800, TraesCS4D03G0057800, TraesCS4D03G0064000, and TraesCS4D03G0064400) possibly related to root development were predicted in physical interval of QTrl.sicau-2SY-4D. Taken together, these results enrich our understanding on the genetic basis of RSA and provide a potentially valuable TRL QTL for wheat breeding.