Quantitative Trait Locus Mapping for Drought Tolerance in Soybean Recombinant Inbred Line Population

Plants

Jae-Hyeon Oh¹  Hong-Sik Kim²  Sang-Ouk Shin³  Ji-Hee Park³  Sanjeev Kumar Dhungana³  In-Youl Baek³  Beom-Kyu Kang³  Chan-Sik Jung³  Jeong-Hyun Seo³  Jung-Sook Sung³ 

[1] Department of Agricultural Biotechnology, Gene Engineering Division, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju 54874, Korea;Department of Central Area Crop Science, Crop Post-Harvest Technology Division, National Institute of Crop Science, Rural Development Administration, Suwon 16429, Korea;Department of Southern Area Crop Science, Upland Crop Breeding Research Division, National Institute of Crop Science, Rural Development Administration, Miryang 50424, Korea;

关键词: candidate gene;    quantitative trait locus;    recombinant inbred line;    soybean drought tolerance;    weighted drought coefficient;   

DOI  :  10.3390/plants10091816

来源: DOAJ

【 摘 要 】

Improving drought stress tolerance of soybean could be an effective way to minimize the yield reduction in the drought prevailing regions. Identification of drought tolerance-related quantitative trait loci (QTLs) is useful to facilitate the development of stress-tolerant varieties. This study aimed to identify the QTLs for drought tolerance in soybean using a recombinant inbred line (RIL) population developed from the cross between a drought-tolerant ‘PI416937’ and a susceptible ‘Cheonsang’ cultivar. Phenotyping was done with a weighted drought coefficient derived from the vegetative and reproductive traits. The genetic map was constructed using 2648 polymorphic SNP markers that distributed on 20 chromosomes with a mean genetic distance of 1.36 cM between markers. A total of 10 QTLs with 3.52–4.7 logarithm of odds value accounting for up to 12.9% phenotypic variance were identified on seven chromosomes. Five chromosomes—2, 7, 10, 14, and 20—contained one QTL each, and chromosomes 1 and 19 harbored two and three QTLs, respectively. The chromosomal locations of seven QTLs overlapped or located close to the related QTLs and/or potential candidate genes reported earlier. The QTLs and closely linked markers could be utilized in maker-assisted selection to accelerate the breeding for drought tolerance in soybean.

【 授权许可】

Unknown