title: Environmental Association Analyses Identify Candidates for Abiotic Stress Tolerance in Glycine soja, the Wild Progenitor of Cultivated Soybeans.
abstract: Natural populations across a species range demonstrate population structure owing to neutral processes such as localized origins of mutations and migration limitations. Selection also acts on a subset of loci, contributing to local adaptation. An understanding of the genetic basis of adaptation to local environmental conditions is a fundamental goal in basic biological research. When applied to crop wild relatives, this same research provides the opportunity to identify adaptive genetic variation that may be used to breed for crops better adapted to novel or changing environments. The present study explores an ex situ conservation collection, the USDA germplasm collection, genotyped at 32,416 SNPs to identify population structure and test for associations with bioclimatic and biophysical variables in Glycine soja, the wild progenitor of Glycine max (soybean). Candidate loci were detected that putatively contribute to adaptation to abiotic stresses. The identification of potentially adaptive variants in this ex situ collection may permit a more targeted use of germplasm collections.
authors.affiliation: Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minnesota 55108.
authors.forename: Justin E
authors.initials: JE
authors.lastname: Anderson
authors.affiliation: Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minnesota 55108.
authors.forename: Thomas J Y
authors.initials: TJ
authors.lastname: Kono
authors.affiliation: Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minnesota 55108.
authors.forename: Robert M
authors.initials: RM
authors.lastname: Stupar
authors.affiliation: Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minnesota 55108 Biodiversity Research Centre and Department of Botany, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada kant0063@umn.edu pmorrell@umn.edu.
authors.forename: Michael B
authors.initials: MB
authors.lastname: Kantar
authors.affiliation: Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minnesota 55108 kant0063@umn.edu pmorrell@umn.edu.
authors.forename: Peter L
authors.initials: PL
authors.lastname: Morrell
mesh_terms: D000220:Adaptation, Biological; D000483:Alleles; D002874:Chromosome Mapping; D018556:Crops, Agricultural / Q000235:genetics / Q000378:metabolism; D004777:Environment; D008040:Genetic Linkage; D005828:Genetics, Population; D055106:Genome-Wide Association Study; D015810:Linkage Disequilibrium; D020641:Polymorphism, Single Nucleotide; D013025:Glycine max / Q000235:genetics* / Q000378:metabolism*; D013312:Stress, Physiological / Q000235:genetics*
keywords: Glycine soja; crop wild relative; germplasm collections; landscape genomics; population structure; soybean
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