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Ref ID: 28623
Ref Type: Journal Article
Authors: Asano, Kenji
Yamasaki, Masanori
Takuno, Shohei
Miura, Kotaro
Katagiri, Satoshi
Ito, Tomoko
Doi, Kazuyuki
Wu, Jianzhong
Ebana, Kaworu
Matsumoto, Takashi
Innan, Hideki
Kitano, Hidemi
Ashikari, Motoyuki
Matsuoka, Makoto
Title: Artificial selection for a green revolution gene during <i>japonica</i> rice domestication
Date: 2011
Source: PNAS
DOI: 10.1073/pnas.1019490108
Abstract: The semidwarf phenotype has been extensively selected during modern crop breeding as an agronomically important trait. Introduction of the semidwarf gene, semi-dwarf1 (sd1), which encodes a gibberellin biosynthesis enzyme, made significant contributions to the “green revolution” in rice (<i>Oryza sativa L.</i>). Here we report that SD1 was involved not only in modern breeding including the green revolution, but also in early steps of rice domestication. We identified two SNPs in <i>O. sativa</i> subspecies (ssp.) <i>japonica</i> SD1 as functional nucleotide polymorphisms (FNPs) responsible for shorter culm length and low gibberellin biosynthetic activity. Genetic diversity analysis among <i>O. sativa</i> ssp. <i>japonica</i> and <i>indica</i>, along with their wild ancestor <i>O. rufipogon</i> Griff, revealed that these FNPs clearly differentiate the <i>japonica</i> landrace and <i>O. rufipogon</i>. We also found a dramatic reduction in nucleotide diversity around SD1 only in the <i>japonica</i> landrace, not in the <i>indica</i> landrace or <i>O. rufipogon</i>. These findings indicate that SD1 has been subjected to artificial selection in rice evolution and that the FNPs participated in <i>japonica</i> domestication, suggesting that ancient humans already used the green revolution gene.
Date Created: 10/5/2011
Volume: 108
Number: 27
Page Start: 11034
Page End: 11039