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Genes 2018, 9(10), 489; https://doi.org/10.3390/genes9100489

Genes Contributing to Domestication of Rice Seed Traits and Its Global Expansion

1,2,†
,
1,†
and
1,*
1
National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
2
Wuhan Life Origin Biotech Joint Stock Co., Ltd., Wuhan 430206, China
These authors contributed to work equally to this work.
*
Author to whom correspondence should be addressed.
Received: 10 September 2018 / Revised: 1 October 2018 / Accepted: 3 October 2018 / Published: 10 October 2018
(This article belongs to the Special Issue Genomics of Plant Domestication and Crop Evolution)
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Abstract

Asian rice (Oryza sativa) and African rice (Oryza glaberrima) are separately domesticated from their wild ancestors Oryza rufipogon and Oryza barthii, which are very sensitive to daylength. In the process of domestication, some traits that are favorable for the natural survival of wild rice such as seed dormancy and shattering have become favorable ones for human consumption due to the loss-of-function mutations in the genes that are underlying these traits. As a consequence, many genes that are related to these kinds of traits have been fixed with favorable alleles in modern cultivars by artificial selection. After domestication, Oryza sativa cultivars gradually spread to temperate and cool regions from the tropics and subtropics due to the loss of their photoperiod sensitivity. In this paper, we review the characteristics of domestication-related seed traits and heading dates in rice, including the key genes controlling these traits, the differences in allelic diversity between wild rice and cultivars, the geographic distribution of alleles, and the regulatory pathways of these traits. A comprehensive comparison shows that these genes contributed to rice domestication and its global expansion. In addition, these traits have also experienced parallel evolution by artificial selection on the homologues of key genes in other cereals. View Full-Text
Keywords: domestication; seed shattering; seed dormancy; flowering time; global expansion; parallel evolution domestication; seed shattering; seed dormancy; flowering time; global expansion; parallel evolution
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Liu, H.; Li, Q.; Xing, Y. Genes Contributing to Domestication of Rice Seed Traits and Its Global Expansion. Genes 2018, 9, 489.

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