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Quantitative Trait Locus Mapping of Flowering Time and Maturity in Soybean Using Next-Generation Sequencing-Based
Lingping Kong1,2, Sijia Lu1, Yanping Wang3
1School of Life Sciences, Guangzhou University, Guangzhou, China.
Frontiers in Plant Science
|July 28, 2018
Summary
Researchers identified key quantitative trait loci (QTLs) controlling soybean flowering and maturity. These findings aid in breeding soybean varieties adapted to diverse latitudes and with improved yield traits.
Area of Science:
- Plant Genetics
- Agronomy
- Molecular Biology
Background:
- Soybean (Glycine max L.) adaptation to temperate regions relies on genetic variations influencing flowering and maturity.
- Identifying quantitative trait loci (QTLs) and candidate genes is crucial for understanding soybean flowering mechanisms and adaptation.
Purpose of the Study:
- To identify novel QTLs controlling soybean flowering time (R1), maturity (R8), and reproductive period (RP).
- To utilize next-generation sequencing (NGS)-based QTL analysis for efficient trait identification.
Main Methods:
- Development of two F8:10 recombinant inbred line (RIL) populations (Dongnong 50 × Williams 82 and Suinong 14 × Enrei).
- Field evaluation of R1, R8, and RP traits.
- Next-generation sequencing (NGS)-based QTL analysis.
Main Results:
- A single major QTL on chromosome 4 simultaneously controlled R1, R8, and RP in the DW RIL population.
- Three QTLs were mapped to chromosomes 6, 11, and 16 in the SE RIL population.
- Two pleiotropic QTLs on chromosomes 4 and 6 affected R1, R8, and RP; a QTL on chromosome 11 influenced RP; and a QTL on chromosome 16 affected R1, all contributing to soybean maturation.
Conclusions:
- The identified QTLs provide targets for fine mapping and map-based cloning of candidate genes.
- These QTLs are valuable for elucidating soybean adaptation mechanisms and breeding cultivars with enhanced yield-related traits.
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