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- Title
Quantitative Trait Locus Mapping for Drought Tolerance in Soybean Recombinant Inbred Line Population.
- Authors
Dhungana, Sanjeev Kumar; Park, Ji-Hee; Oh, Jae-Hyeon; Kang, Beom-Kyu; Seo, Jeong-Hyun; Sung, Jung-Sook; Kim, Hong-Sik; Shin, Sang-Ouk; Baek, In-Youl; Jung, Chan-Sik
- Abstract
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.
- Subjects
LOCUS (Genetics); DROUGHT tolerance; DROUGHTS; PHENOTYPES; GENETIC distance; CHROMOSOMES
- Publication
Plants (2223-7747), 2021, Vol 10, Issue 9, p1816
- ISSN
2223-7747
- Publication type
Article
- DOI
10.3390/plants10091816