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Whole-Genome Analysis of Candidate genes Associated with Seed Size and Weight in Sorghum bicolor Reveals Signatures of Artificial Selection and Insights into Parallel Domestication in Cereal Crops

Tao, Yongfu and Mace, Emma S. and Tai, Shuaishuai and Cruickshank, Alan and Campbell, Bradley C. and Zhao, Xianrong and Van Oosterom, Erik J. and Godwin, Ian D. and Botella, Jose R. and Jordan, David R. (2017) Whole-Genome Analysis of Candidate genes Associated with Seed Size and Weight in Sorghum bicolor Reveals Signatures of Artificial Selection and Insights into Parallel Domestication in Cereal Crops. Frontiers in Plant Science, 8 . Article 1237. ISSN 1664-462X

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Article Link(s): https://doi.org/10.3389/fpls.2017.01237

Publisher URL: http://journal.frontiersin.org/article/10.3389/fpls.2017.01237/full

Abstract

Seed size and seed weight are major quality attributes and important determinants of yield that have been strongly selected for during crop domestication. Limited information is available about the genetic control and genes associated with seed size and weight in sorghum. This study identified sorghum orthologues of genes with proven effects on seed size and weight in other plant species and searched for evidence of selection during domestication by utilizing resequencing data from a diversity panel. In total, 114 seed size candidate genes were identified in sorghum, 63 of which exhibited signals of purifying selection during domestication. A significant number of these genes also had domestication signatures in maize and rice, consistent with the parallel domestication of seed size in cereals. Seed size candidate genes that exhibited differentially high expression levels in seed were also found more likely to be under selection during domestication, supporting the hypothesis that modification to seed size during domestication preferentially targeted genes for intrinsic seed size rather than genes associated with physiological factors involved in the carbohydrate supply and transport. Our results provide improved understanding of the complex genetic control of seed size and weight and the impact of domestication on these genes.

Item Type:Article
Business groups:Crop and Food Science
Keywords:Sorghum, seed size, Orthologues, Comparative genomics, selection signatures, Domestication
Subjects:Science > Botany > Genetics
Plant culture > Food crops
Plant culture > Field crops > Sorghum
Deposited On:28 Sep 2017 01:07
Last Modified:28 Sep 2017 01:17

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