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水稻畸形颖壳突变体ah是双胚苗品系W2555中自然突变产生的。该突变体的内外稃畸形,退化;雄蕊雌蕊化,雌蕊败育;浆片同源转化为类内外稃的结构,推测该突变体可能影响B功能基因的正常发育。与野生型相比,突变体的小穗分支稀疏,每级枝梗上颖花数目减少,一般为4～6朵;小穗顶端的颖花经常不能成熟,表现为颖花始终泛白,不能转绿,因此该突变也影响花序分生组织的发育。进一步的研究证明,该突变体的发育受外界环境的影响。突变性状的遗传分析表明,该突变体由单隐性基因控制。
Mutant ah mutant rice is a natural mutation in the double germ line W2555. The internal and external choroid deformity of the mutant degenerated; the stamen pistil and the pistil abortion; the homologous transformation of the pulp into the structure of the class inside and outside the loop, suggesting that the mutant may affect the normal development of B function gene. Compared with the wild type, the spikelets of mutants were sparse, and the number of spikelets on each branch was reduced, usually 4 to 6; the spikelets on the top of spikelets often did not mature, showing that the spikelets always whiten and could not Turn green, so the mutation also affects inflorescence meristem development. Further studies have shown that the development of the mutant is affected by the external environment. Genetic analysis of the mutant trait showed that the mutant was controlled by a single recessive gene.