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United States Department of Agriculture

Agricultural Research Service

Title: The Genomic Extent of Artificial Selection

Authors
item Wright, Stephen - UNIV OF CALIFORNIA-IRVING
item Vroh Bi, Irie - UNIVERSITY OF MISSOURI
item Schroeder, Steven - UNIVERSITY OF MISSOURI
item Doebley, John - UNIV OF WISCONSIN-MADISON
item Yamasaki, Masanori - UNIVERSITY OF MISSOURI
item McMullen, Michael
item Gaut, Brandon - UNIV OF CALIFORNIA-IRVING

Submitted to: Maize Genetics Conference Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: January 5, 2005
Publication Date: March 10, 2005
Citation: Wright, S., Vroh Bi, I., Schroeder, S., Doebley, J., Yamasaki, M., Mcmullen, M.D., Gaut, B. 2005. The genomic extent of artificial selection [2005]. Maize Genetics Conference. No. T24, p. 32.

Technical Abstract: Artificial selection promotes rapid phenotypic evolution, but the number and function of loci affected by artificial selection is unknown for any domesticated species. We investigated the history of selection on the maize genome, based on single nucleotide polymorphisms (SNPs) at 774 randomly chosen genes in maize (Zea mays ssp. mays) and its wild progenitor teosinte (Z. mays ssp. parviglumis). Statistical analyses reveal two classes of maize genes: genes that experienced a neutral population bottleneck during domestication and genes that retained the footprint of artificial selection. Two to four-percent of maize genes belong to the selected class. Candidate selected genes, particularly those involved in plant growth, were significantly overrepresented in QTL regions mapped for phenotypic differences between maize and teosinte. Overall, these results suggest that ~1200 genes have been targeted by artificial selection during maize domestication and improvement.

Last Modified: 12/22/2014
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