Single and multi-trait GWAS identify genetic factors associated with production traits in common bean under abiotic stress environments

Atena Oladzad, Timothy Porch, Juan Carlos Rosas, Samira Mafi Moghaddam, James Beaver, Steve E. Beebe, Jimmy Burridge, Celestina Nhagupana Jochua, Magalhaes Amade Miguel, Phillip N. Miklas, Bodo Ratz, Jeffery W. White, Jonathan Lynch, Phillip E. McClean

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The genetic improvement of economically important production traits of dry bean (Phaseolus vulgaris L.), for geographic regions where production is threatened by drought and high temperature stress, is challenging because of the complex genetic nature of these traits. Large scale SNP data sets for the two major gene pools of bean, Andean and Middle American, were developed by mapping multiple pools of genotype-by-sequencing reads and identifying over 200k SNPs for each gene pool against the most recent assembly of the P. vulgaris genome sequence. Moderately sized Bean Abiotic Stress Evaluation (BASE) panels, consisting of genotypes appropriate for production in Central America and Africa, were assembled. Phylogenetic analyses demonstrated the BASE populations represented broad genetic diversity for the appropriate races within the two gene pools. Joint mixed linear model genome-wide association studies with data from multiple locations discovered genetic factors associated with four production traits in both heat and drought stress environments using the BASE panels. Pleiotropic genetic factors were discovered using a multi-trait mixed model analysis. SNPs within or near candidate genes associated with hormone signaling, epigenetic regulation, and ROS detoxification under stress conditions were identified and can be used as genetic markers in dry bean breeding programs.

Original languageEnglish (US)
Pages (from-to)1881-1892
Number of pages12
JournalG3: Genes, Genomes, Genetics
Volume9
Issue number6
DOIs
StatePublished - Jan 1 2019

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Genetics
  • Genetics(clinical)

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    Oladzad, A., Porch, T., Rosas, J. C., Moghaddam, S. M., Beaver, J., Beebe, S. E., Burridge, J., Jochua, C. N., Miguel, M. A., Miklas, P. N., Ratz, B., White, J. W., Lynch, J., & McClean, P. E. (2019). Single and multi-trait GWAS identify genetic factors associated with production traits in common bean under abiotic stress environments. G3: Genes, Genomes, Genetics, 9(6), 1881-1892. https://doi.org/10.1534/g3.119.400072