Understanding genetic control of root system architecture in soybean: Insights into the genetic basis of lateral root number

Plant, Cell & Environment
Silvas J PrinceHenry T Nguyen

Abstract

Developing crops with better root systems is a promising strategy to ensure productivity in both optimum and stress environments. Root system architectural traits in 397 soybean accessions were characterized and a high-density single nucleotide polymorphisms (SNPs)-based genome-wide association study was performed to identify the underlying genes associated with root structure. SNPs associated with root architectural traits specific to landraces and elite germplasm pools were detected. Four loci were detected in landraces for lateral root number (LRN) and distribution of root thickness in diameter Class I with a major locus on chromosome 16. This major loci was detected in the coding region of unknown protein, and subsequent analyses demonstrated that root traits are affected with mutated haplotypes of the gene. In elite germplasm pool, 3 significant SNPs in alanine-glyoxalate aminotransferase, Leucine-Rich Repeat receptor/No apical meristem, and unknown functional genes were found to govern multiple traits including root surface area and volume. However, no major loci were detected for LRN in elite germplasm. Nucleotide diversity analysis found evidence of selective sweeps around the landraces LRN gene. Soybean accessions with...Continue Reading

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Citations

Jan 21, 2020·Journal of Experimental Botany·Agnieszka Deja-MuylleTom Beeckman
Dec 24, 2018·Plant, Cell & Environment·Christine H FoyerHon-Ming Lam
Aug 23, 2019·The Plant Journal : for Cell and Molecular Biology·Babu ValliyodanHenry T Nguyen
Dec 15, 2020·Physiologia Plantarum·Jitendra KumarKadambot H M Siddique

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