Evidence of selection on fatty acid biosynthetic genes during the evolution of cultivated sunflower.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Mark A Chapman, John M Burke

Abstract

The identification of genes underlying the phenotypic transitions that took place during crop evolution, as well as the genomic extent of resultant selective sweeps, is of great interest to both evolutionary biologists and applied plant scientists. In this study, we report the results of a molecular evolutionary analysis of 11 genes that underlie fatty acid biosynthesis and metabolism in wild and cultivated sunflower (Helianthus annuus). Seven of these 11 genes showed evidence of selection at the nucleotide level, with 1 (FAD7) having experienced selection prior to domestication, 2 (FAD2-3 and FAD3) having experienced selection during domestication, and 4 (FAB1, FAD2-1, FAD6, and FATB) having experienced selection during the subsequent period of improvement. Sequencing of a subset of these genes from an extended panel of sunflower cultivars revealed little additional variation, and an analysis of the genomic region surrounding one of these genes (FAD2-1) revealed the occurrence of an extensive selective sweep affecting a region spanning at least ca. 100 kb. Given that previous population genetic analyses have revealed a relatively rapid decay of linkage disequilibrium in sunflower, this finding indicates the occurrence of stron...Continue Reading

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Citations

Aug 10, 2013·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Dinushika ThambugalaSylvie Cloutier
Mar 5, 2014·Briefings in Functional Genomics·Michael B KantarLoren H Rieseberg
Feb 8, 2014·BMC Plant Biology·Stephanie A PearlJohn M Burke
Sep 27, 2014·BMC Plant Biology·Ying-Hui LiLi-Juan Qiu
Feb 24, 2015·Applications in Plant Sciences·Mark A Chapman
May 18, 2016·Molecular Biology and Evolution·Romina BeleggiaRoberto Papa
Jun 1, 2016·Frontiers in Plant Science·Ignacio DurrutyMaría M Echarte
Dec 22, 2017·BMC Genetics·Maria LundströmJenny Hagenblad
Nov 2, 2018·Genes·Aleksandra RadanovićSiniša Jocić
Dec 29, 2018·Biomolecules·Alina ChernovaPhilipp Khaytovich
May 31, 2013·Journal of Agricultural and Food Chemistry·Sherry A Flint-Garcia

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