Zhang Quanfang, Xu Jiandi, Li Yun, Xu Peizhou, Zhang Hongyu, Wu Xianjun
Rice Research Institute, Sichuan Agricultural University, Wenjiang 611130, China.
J Genet Genomics. 2007 Jun;34(6):519-26. doi: 10.1016/S1673-8527(07)60057-5.
A mutant with abnormal hull was first discovered from a twin-seedling strain W2555 in rice (Oryza sativa L.). The mutant had sparse branches and decreased number of florets from the base to the peak. Frequently, the florets at the top of the panicle did not develop completely. The underdeveloped florets often showed slender and white in their life cycle. Genetic analysis indicated that the mutant traits were controlled by a single recessive gene (temporarily designated as ah). ah gene controlled the development of inflorescence meristem and the flower organ. The florets of mutant showed degenerated lemma and palea. Stamens and lodicules were homeoticly transformed into pistils and palea/lemma-like structures, respectively. It seemed that ah mutant phenotypes of the homeotic conversions in lodicules and stamens were very similar to that of the B loss-of-function spw1 gene reported previously in rice.
一个具有异常颖壳的突变体最初是从水稻（Oryza sativa L.）的双苗品系W2555中发现的。该突变体分枝稀疏，从基部到顶部的小花数量减少。通常，穗顶部的小花发育不完全。发育不全的小花在其生命周期中通常表现为细长且白色。遗传分析表明，突变性状由单个隐性基因（暂命名为ah）控制。ah基因控制花序分生组织和花器官的发育。突变体的小花表现出退化的外稃和内稃。雄蕊和浆片分别同源转化为雌蕊和类似内稃/外稃的结构。似乎浆片和雄蕊同源转化的ah突变体表型与先前报道的水稻B功能缺失spw1基因的表型非常相似。
