水稻动态株型材料的遗传特性

Heredity of Rice Transforming Leaf Morphology

从引进的水稻材料中发现了在生育前期叶片披垂,后期叶片直立的动态株型材料泸香90A.动态株型材料90A分别与正常株型恢复系蜀恢527和泸香恢1号杂交,F1代均表现显性,即动态型,杂交组合的F2代群体发生分离,动态型植株与正常型植株的比例表现为3∶1.初步的遗传分析表明,上述动态株型属单基因显性遗传.

Rice cultivar Luxiang 90A has morphological characteristics with transforming plant shape, with larger leaf ineluded angle in its early growth stage and smaller leaf included angle in late growth stage. A study on heredity of transforming leaf morphology of Luxiang 90A is carried out by conventional crosses between Luxiang 90A and two rice restorer lines Shuhui 527 and Luxianghui No. 1 which have normal leaf morphology. F1 population and F2 population are identified, investigated and analyzed statistically. Results show that all F1 progenies have morphological characteristics with transforming plant shape, while segregation isobserved in F2 population. F2 progenies segregate to fit 3 ： 1 ratio （ transforming shape/normal shape）. The result suggests that the morphological characteristics with transforming plant shape of rice eultivar Luxiang 90A is controlled by a single dominant gene.