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Originally published in Science Express on 13 April 2006
Science 2 June 2006:
Vol. 312. no. 5778, pp. 1392 - 1396
DOI: 10.1126/science.1126410
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Reports

An SNP Caused Loss of Seed Shattering During Rice Domestication

Saeko Konishi,1* Takeshi Izawa,2* Shao Yang Lin,1{dagger} Kaworu Ebana,2 Yoshimichi Fukuta,3 Takuji Sasaki,2 Masahiro Yano2{ddagger}

Loss of seed shattering was a key event in the domestication of major cereals. We revealed that the qSH1 gene, a major quantitative trait locus of seed shattering in rice, encodes a BEL1-type homeobox gene and demonstrated that a single-nucleotide polymorphism (SNP) in the 5' regulatory region of the qSH1 gene caused loss of seed shattering owing to the absence of abscission layer formation. Haplotype analysis and association analysis in various rice collections revealed that the SNP was highly associated with shattering among japonica subspecies of rice, implying that it was a target of artificial selection during rice domestication.

1 Institute of the Society for Techno-Innovation of Agriculture, Forestry, and Fisheries, 446-1 Ippaizuka, Kamiyokoba Tsukuba, Ibaraki 305-0854, Japan.
2 National Institute of Agrobiological Sciences, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan.
3 Japan International Research Center for Agricultural Sciences, Tsukuba, Ibaraki 305-8686, Japan.

* These authors contributed equally to this work.

{dagger} Present address: Honda Research Institute Japan Co., Ltd., Kisarazu, Chiba, 292-0818 Japan.

{ddagger} To whom correspondence should be addressed. E-mail: myano{at}nias.affrc.go.jp

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Science. ISSN 0036-8075 (print), 1095-9203 (online)