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Largely unlinked gene sets targeted by selection for domestication syndrome phenotypes in maize and sorghum

View ORCID ProfileXianjun Lai, Lang Yan, Yanli Lu, View ORCID ProfileJames C. Schnable
doi: https://doi.org/10.1101/184424
Xianjun Lai
1Center for Plant Science Innovation & Department of Agronomy and Horticulture, University of Nebraska-Lincoln, NE, 68588, USA
2Maize Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
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Lang Yan
1Center for Plant Science Innovation & Department of Agronomy and Horticulture, University of Nebraska-Lincoln, NE, 68588, USA
3College of Life Sciences, Sichuan University, Chengdu, 610065, China
4Laboratory of Functional Genome and Application of Potato, Xichang College, Liangshan, 615000, China
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Yanli Lu
2Maize Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
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James C. Schnable
1Center for Plant Science Innovation & Department of Agronomy and Horticulture, University of Nebraska-Lincoln, NE, 68588, USA
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  • For correspondence: schnable@unl.edu
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ABSTRACT

The domestication of diverse grain crops from wild grasses resulted from artificial selection for a suite of overlapping traits producing changes referred to in aggregate as ”domestication syndrome”. Parallel phenotypic change can be accomplished by either selection on orthologous genes, or selection on non-orthologous genes with parallel phenotypic effects. To determine how often artificial selection for domestication traits in the grasses targeted orthologous genes, we employed resequencing data from wild and domesticated accessions of Zea (maize) and Sorghum (sorghum). Many ”classic” domestication genes identified through QTL mapping in populations resulting from wild/domesticated crosses indeed show signatures of parallel selection in both maize and sorghum. However, the overall number of genes showing signatures of parallel selection in both species is not significantly different from that expected by chance. This suggests that, while a small number of genes will extremely large phenotypic effects have been targeted repeatedly by artificial selection during domestication, the optimization portion of domestication targeted small and largely non-overlapping subsets of all possible genes which could produce equivalent phenotypic alterations.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-ND 4.0 International license.
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Posted September 04, 2017.
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Largely unlinked gene sets targeted by selection for domestication syndrome phenotypes in maize and sorghum
Xianjun Lai, Lang Yan, Yanli Lu, James C. Schnable
bioRxiv 184424; doi: https://doi.org/10.1101/184424
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Largely unlinked gene sets targeted by selection for domestication syndrome phenotypes in maize and sorghum
Xianjun Lai, Lang Yan, Yanli Lu, James C. Schnable
bioRxiv 184424; doi: https://doi.org/10.1101/184424

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