文献类型： 外文期刊

作者： Ye, Heng ¹ ; Song, Li ¹ ; Chen, Huatao ¹ ; Valliyodan, Babu ¹ ; Cheng, Peng ¹ ; Ali, Liakat ² ; Tri Vuong ¹ ; Wu, Chengju ¹ ;

作者机构： 1.Univ Missouri, Div Plant Sci, Columbia, MO 65211 USA

2.Univ Missouri, Div Plant Sci, Fisher Delta Res Ctr, Portageville, MO 63873 USA

3.Univ Arkansas, Dept Crop & Soil Environm Sci, Fayetteville, AR 72701 USA

4.Mississippi State Univ, Dept Plant & Soil Sci, Delta Res & Extens Ctr, Stoneville, MS 38776 USA

5.Louisiana State Univ, Agr Ctr, Red River Res Stn, Baton Rouge, LA 70803 USA

6.Jiangsu Acad Agr Sci, Inst Ind Crops, Nanjing 210014, Jiangsu, Peoples R China

7.Yang

关键词： waterlogging; drought; root system architecture; natural variations; QTL mapping

期刊名称：PLANT CELL AND ENVIRONMENT （ 影响因子：7.228； 五年影响因子：7.791 ）

ISSN： 0140-7791

年卷期： 2018 年 41 卷 9 期

页码：

收录情况： SCI

摘要： Natural genetic variations in waterlogging tolerance are controlled by multiple genes mapped as quantitative trait loci (QTLs) in major crops, including soybean (Glycine max L.). In this research, 2 novel QTLs associated with waterlogging tolerance were mapped from an elite/exotic soybean cross. The subsequent research was focused on a major QTL (qWT_Gm03) with the tolerant allele from the exotic parent. This QTL was isolated into near-isogenic backgrounds, and its effects on waterlogging tolerance were validated in multiple environments. Fine mapping narrowed qWT_Gm03 into a genomic region of <380Kbp excluding Rps1 gene for Phytophthora sojae resistance. The tolerant allele of qWT_Gm03 promotes root growth under nonstress conditions and favourable root plasticity under waterlogging, resulting in improved waterlogging tolerance, yield, and drought tolerance-related traits, possibly through more efficient water/nutrient uptakes. Meanwhile, involvement of auxin pathways was also identified in the regulation of waterlogging tolerance, as the genotypic differences of qWT_Gm03 in waterlogging tolerance and formation of adventitious/aerial roots can be complemented by an exogenous auxin-biosynthesis inhibitor. These findings provided genetic resources to address the urgent demand of improving waterlogging tolerance in soybean and revealed the determinant roles of root architecture and plasticity in the plant adaptation to waterlogging. A major natural genetic variation/QTL to improve waterlogging tolerance was identified from an exotic soybean line. The tolerant allele of this natural genetic variation showed better root growth and more favourable root plasticity to facilitate adequate water and nutrient uptake under nonstress and waterlogging stress conditions, possibly through auxin pathways. In addition to its role in waterlogging tolerance, the tolerant allele of this natural variation help improve yield and drought tolerance-related traits possibly due to the better root growth.