|Vroh Bi, Irie|
Submitted to: Maize Genetics Conference Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 1/5/2005
Publication Date: 3/10/2005
Citation: Wright, S., Vroh Bi, I., Schroeder, S., Doebley, J., Yamasaki, M., Mcmullen, M.D., Gaut, B. 2005. The genomic extent of artificial selection . Maize Genetics Conference. No. T24, p. 32. Interpretive Summary:
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.