Genetic map construction and QTL analysis of leaf-related traits in soybean under monoculture and relay intercropping

Soybean ( Glycine max L.) is an important food and oil crop widely planted by intercropping in southwest China. The shade caused by intercropping changes plant growth traits, such as soybean leaf and dry mass, thereby reducing yields. To improve the yield and elucidate the genetic mechanism of the l...

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Bibliographic Details
Published in:Scientific reports 2019-02, Vol.9 (1), p.2716-2716, Article 2716
Main Authors: Liu, Dai-Ling, Chen, Si-Wei, Liu, Xin-Chun, Yang, Feng, Liu, Wei-Guo, She, Yue-Hui, Du, Jun-Bo, Liu, Chun-Yan, Yang, Wen-Yu, Wu, Xiao-Ling
Format: Article
Language:English
Subjects:
45/29
631/208/480
631/208/711
Agricultural practices
Chromosome Mapping
Gene expression
Gene mapping
Genes, Plant
Genetic analysis
Genomes
Glycine max
Glycine max - genetics
Humanities and Social Sciences
Inbreeding
Intercropping
Leaves
Monoculture
multidisciplinary
Phenotypes
Plant Breeding
Plant growth
Polymorphism, Single Nucleotide
Quantitative Trait Loci
Science
Science (multidisciplinary)
Shading
Single-nucleotide polymorphism
Soybeans
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Summary:Soybean ( Glycine max L.) is an important food and oil crop widely planted by intercropping in southwest China. The shade caused by intercropping changes plant growth traits, such as soybean leaf and dry mass, thereby reducing yields. To improve the yield and elucidate the genetic mechanism of the leaf-related traits in intercropped soybeans, we measured the F 6:7–8 recombinant inbred lines (RILs) derived from the cross of ‘Nandou 12’ and ‘Jiuyuehuang’ for six leaf-related traits under monoculture and relay intercropping in 2015 and 2016. We found 6366 single-nucleotide polymorphisms (SNPs) markers that covered the whole genome of soybean distributed in 20 linkage groups, which spanned 2818.67 cM with an average interval of 0.44 cM between adjacent markers. Nineteen quantitative trait loci (QTLs) were detected in two environments in 2 years. Three candidate genes associated to leaf-related traits were found according to gene expression and GO enrichment analyses. These results revealed the susceptibility of leaf phenotype to shading and helped elucidate the mechanisms that control leaf-related traits.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-39110-8