A novel QTL QTrl.saw-2D.2 associated with the total root length identified by linkage and association analyses in wheat (Triticum aestivum L.)
文献类型： 外文期刊
作者： Zheng, Xingwei 1 ; Wen, Xiaojie 2 ; Qiao, Ling 1 ; Zhao, Jiajia 1 ; Zhang, Xiaojun 3 ; Li, Xin 3 ; Zhang, Shuwei 3 ; Yang 1 ;
作者机构： 1.Shanxi Acad Agr Sci, Inst Wheat Res, Linfen, Peoples R China
2.Chinese Acad Agr Sci, Biotechnol Res Inst, Beijing, Peoples R China
3.Shanxi Acad Agr Sci, Inst Crop Sci, Shanxi Prov Key Lab Crop Genet & Gene Improvement, Taiyuan, Shanxi, Peoples R China
4.Univ Idaho, Dept Plant Sci, Aberdeen, ID 83210 USA
关键词： Drought tolerance coefficient; Quantitative trait locus; Stay green; Total root length; Yield components
期刊名称：PLANTA （ 影响因子：4.116； 五年影响因子：4.316 ）
ISSN： 0032-0935
年卷期： 2019 年 250 卷 1 期
页码：
收录情况： SCI
摘要： Main conclusionIn wheat, a QTL QTrl.saw-2D.2 associated with the total root length was identified, presumably containing genes closely related to root development.A mapping population of 184 recombinant inbred lines derived from the cross SY95-71xCH7034 was used to map QTL for seedling root characteristics in hydroponic culture (HC) and in soil-filled pot (SP) methods. Four traits, including maximum root length (MRL), root number (RN), total length (TRL), and root diameter (RD) were measured and used in QTL analyses. A total of 33 QTL for the four root traits were detected, 17 QTLs for TRL, six for RN, seven for MRL, and three for RD. Seven QTL were detected in both HC and SP methods, which explained 7-18% phenotypic variation. One QTL QTrl.saw-2D.2 detected in both HC and SP methods was also validated in another population comprised of 215 diverse lines. This QTL is a novel QTL that explained the highest phenotypic variation 18% in all QTL identified in the present study. Based on candidate gene and comparative genomics analyses, the QTL QTrl.saw-2D.2 may contain genes closely related to root development in wheat (Triticum aestivum L.). The two candidate genes were proposed to explore in future studies.
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