Two genomic regions contribute disproportionately to geographic differentiation in wild barley.
Genetic differentiation in natural populations is driven by geographic distance and by ecological or physical features within and between natural habitats that reduce migration. The primary population structure in wild barley differentiates populations east and west of the Zagros Mountains. Genetic differentiation between eastern and western populations is uneven across the genome and is greatest on linkage groups 2H and 5H. Genetic markers in these two regions demonstrate the largest difference in frequency between the primary populations and have the highest informativeness for assignment to each population. Previous cytological and genetic studies suggest there are chromosomal structural rearrangements (inversions or translocations) in these genomic regions. Environmental association analyses identified an association with both temperature and precipitation variables on 2H and with precipitation variables on 5H.
Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minnesota 55108 Department of Plant Biology, University of Minnesota, St. Paul, Minnesota 55108.
Zhou
Z
Fang
Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minnesota 55108.
Ana M
AM
Gonzales
Department of Ecology and Evolutionary Biology, University of California, Irvine, California 92697.
Michael T
MT
Clegg
Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minnesota 55108.
Kevin P
KP
Smith
Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minnesota 55108 Department of Plant Biology, University of Minnesota, St. Paul, Minnesota 55108.
Gary J
GJ
Muehlbauer
Department of Plant Pathology, University of Minnesota, St. Paul, Minnesota 55108.
Brian J
BJ
Steffenson
Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minnesota 55108 pmorrell@umn.edu.
Peter L
PL
Morrell
D004777:Environment; D014644:Genetic Variation; D005828:Genetics, Population; D018745:Genome, Plant; D005838:Genotype; D006239:Haplotypes; D001467:Hordeum / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D025341:Principal Component Analysis; D012313:RNA / Q000737:chemistry / Q000378:metabolism; D017423:Sequence Analysis, RNA
D012313:RNA
chromosome structural variation; environmental association; local adaptation; population structure; wild barley