Konishi Saeko, Izawa Takeshi, Lin Shao Yang, Ebana Kaworu, Fukuta Yoshimichi, Sasaki Takuji, Yano Masahiro
Institute of the Society for Techno-Innovation of Agriculture, Forestry, and Fisheries, 446-1 Ippaizuka, Kamiyokoba Tsukuba, Ibaraki 305-0854, Japan.
Science. 2006 Jun 2;312(5778):1392-6. doi: 10.1126/science.1126410. Epub 2006 Apr 13.
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.
种子落粒性的丧失是主要谷类作物驯化过程中的关键事件。我们发现，水稻种子落粒性的一个主要数量性状位点qSH1基因编码一个BEL1型同源异型盒基因，并证明qSH1基因5'调控区的一个单核苷酸多态性（SNP）由于缺乏离层形成而导致种子落粒性丧失。对各种水稻群体的单倍型分析和关联分析表明，该SNP与粳稻亚种的落粒性高度相关，这意味着它是水稻驯化过程中人工选择的目标。
