2012/08/03 by Tanja Pyhäjärvi, Matthew B. Hufford, Sofiane Mezmouk +1 · 1 voice · 151 citations
Agricultural and Biological Sciences · Biochemistry, Genetics and Molecular Biology · #Adaptation (eye) #Biological dispersal #Disequilibrium #Genetic Mapping and Diversity in Plants and Animals #Genetic diversity and population structure #Genetic structure #Genetics and Plant Breeding #Identification (biology) #Linkage disequilibrium #Local adaptation #Population #Population genetics #q-bio.PE
paper · pdf · doi:10.1093/gbe/evt109
published in Genome Biology and Evolution 5(9), 1594-1609 (Oxford University Press)
arxiv created 2012/08/03 · openalex publication_date 2013/07/30 · arxiv updated 2013/08/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Populations of widely distributed species encounter and must adapt to local environmental conditions. However, comprehensive characterization of the genetic basis of adaptation is demanding, requiring genome-wide genotype data, multiple sampled populations, and an understanding of population structure and potential selection pressures. Here, we used single-nucleotide polymorphism genotyping and data on numerous environmental variables to describe the genetic basis of local adaptation in 21 populations of teosinte, the wild ancestor of maize. We found complex hierarchical genetic structure created by altitude, dispersal events, and admixture among subspecies, which complicated identification of locally beneficial alleles. Patterns of linkage disequilibrium revealed four large putative inversion polymorphisms showing clinal patterns of frequency. Population differentiation and environmental correlations suggest that both inversions and intergenic polymorphisms are involved in local adaptation.