Identification and fine mapping of qSW2 for leaf slow wilting in soybean

文献类型： 外文期刊

第一作者： Li, Shengyou

作者： Li, Shengyou;Wang, Changling;Yan, Chunjuan;Sun, Xugang;Zhang, Lijun;Cao, Yongqiang;Wang, Wenbin;Song, Shuhong

作者机构：

关键词： Drought; GWAS; Linkage mapping; Slow wilting; Soybean ( Glycine max )

期刊名称：CROP JOURNAL （ 影响因子：6.6； 五年影响因子：6.5 ）

ISSN： 2095-5421

年卷期： 2024 年 12 卷 1 期

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收录情况： SCI

摘要： Drought is one of the abiotic stresses limiting the production of soybean (Glycine max). Elucidation of the genetic and molecular basis of the slow -wilting (SW) trait of this crop offers the prospect of its genetic improvement. A panel of 188 accessions and a set of recombinant inbred lines produced from a cross between cultivars Liaodou 14 and Liaodou 21 were used to identify quantitative -trait loci (QTL) associated with SW. Plants were genotyped by Specific -locus amplified fragment sequencing and seedling leaf wilting was assessed under three water -stress treatments. A genome-wide association study identified 26 SW -associated single -nucleotide polymorphisms (SNPs), including three located in a 248 -kb linkage-disequilibrium (LD) block on chromosome 2. Linkage mapping revealed a major -effect QTL, qSW2, associated with all three treatments and adjacent to the LD block. Fine mapping in a BC2F3 population derived from a backcross between Liaodou 21 and R26 confined qSW2 to a 60 -kb interval. Gene expression and sequence variation analysis identified the gene Glyma.02 g218100, encoding an auxin transcription factor, as a candidate gene for qSW2. Our results will contribute significantly to improving drought -resistant soybean cultivars by providing genetic information and resources. (c) 2023 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. This is an open access article under the CC BY -NCND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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