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Position: Home > Articles > Characterization and genetic analysis of a novel mutant mst of rice defective in flower development. Rice Science 2009,16 (1) 75-78

Characterization and genetic analysis of a novel mutant mst of rice defective in flower development.

作者：

Li Yun;Xu PeiZhou;Zhang HongYu;Fu ShaoHong;Yang Jin;Zhang RuQuan;Wu XianJun

单位：

Sichuan Agricultural University;Crops Research Institute;Rice Research Institute; China; Wenjiang 611130; Chengdu Academy of Agricultural and Forestry Sciences

关键词：

flowers;genetic analysis;gynoecium;inflorescences;mutants;mutations;plant development;plant morphology;rice;stamens;stigma;Oryza;Oryza sativa

摘要：

A spontaneous mutant with multiple stigmas (mst) was found in an indica rice line 466. The mst mutant exhibits normal at the vegetative development stage and produces normal inflorescence structures. The difference between the mutant and the wild type was observed when the stamen primordium began to develop. In the mst florets, palea and lemma opened, lodicules were homeotically transformed into palea/lemma-like structures, and stamens were homeotically transformed into carpel-like structures. It looked like multiple stigmas being full of the whole floret. The phenotypic changes of mst were very similar to that of B-like mutant spw1. Compared with other mutants with pistillate morphologies, the severe mst florets showed that the inner three floral organs were completely changed into palea/lemma-like structures. Moreover, the mutant was female sterile. Occasionally, with the changing environment, one or two stamens were fertile. Genetic analysis indicated that the mutant traits were controlled by a single recessive gene.

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Characterization and genetic analysis of a novel mutant mst of rice defective in flower development.

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