Multi-Locus Genome-Wide Association Studies of Fiber-Quality Related Traits in Chinese Early-Maturity Upland Cotton

Frontiers in Plant Science
Junji SuCaixiang Wang

Abstract

Early-maturity varieties of upland cotton are becoming increasingly important for farmers to improve their economic benefits through double cropping practices and mechanical harvesting production in China. However, fiber qualities of early-maturing varieties are relatively poor compared with those of middle- and late- maturing ones. Therefore, it is crucial for researchers to elucidate the genetic bases controlling fiber-quality related traits in early-maturity cultivars, and to improve synergistically cotton earliness and fiber quality. Here, multi-locus genome-wide association studies (ML-GWAS) were conducted in a panel consisting of 160 early-maturing cotton accessions. Each accession was genotyped by 72,792 high-quality single nucleotide polymorphisms (SNPs) using specific-locus amplified fragment sequencing (SLAF-seq) approach, and fiber quality-related traits under four environmental conditions were measured. Applying at least three ML-GWAS methods, a total of 70 significant quantitative trait nucleotides (QTNs) were identified to be associated with five objective traits, including fiber length (FL), fiber strength (FS), fiber micronaire (FM), fiber uniformity (FU) and fiber elongation (FE). Among these QTNs, D11_21619830...Continue Reading

References

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Mar 3, 2018·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Junji SuShuxun Yu

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Citations

Aug 13, 2020·International Journal of Molecular Sciences·Ali MuhammadLingqiang Wang
Jan 29, 2019·Frontiers in Plant Science·Chengguang DongTianzhen Zhang

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Datasets Mentioned

BETA
PRJNA314284

Methods Mentioned

BETA
genotyping
ISIS
NSEMR
PCA
RNA-Seq

Software Mentioned

mrMLM
BWA
SAMTools
R package “
pLARmEB
FASTmrEMMA
EMMA
FASTmrMLM
pKWmEB
pheatmap

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