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SMALL-GRAIN TYPE STERILE RICE LINE BREEDING METHOD, AND SIMPLE SEED PRODUCTION METHOD FOR HYBRID RICE
SMALL-GRAIN TYPE STERILE RICE LINE BREEDING METHOD, AND SIMPLE SEED PRODUCTION METHOD FOR HYBRID RICE
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机译：杂种小粒型不育系的选育方法及简易制种方法
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摘要
The invention discloses a small-grain type sterile rice line breeding method, and a simple seed production method for a hybrid rice. The small-grain type sterile line rice breeding method comprises the following steps: hybridizing C815S as a female parent with Qi-Gui B as a male parent to produce a F1 hybrid; growing the F1 and hybridizing the F1 with a H155S as a female parent to produce a F1' hybrid; growing the F1' to obtain a F2' generation, then isolating, from the F2' generation and a F3' generation, an individual plant with an ideal plant architecture, strong tillering, shorter height, and smaller grain size; and performing, for two or more generations, directional breeding to obtain a small-grain type sterile line. The small-grain type sterile rice line bred using the sterile rice line breeding method has the advantages of a high out-crossing setting rate, high germination potential and seedling survival rate, excellent storage stability, and a low black smut incidence. Using the invention as the basis for seed production for a small-grain type sterile rice line and large-grain type restorer rice lice allows simultaneous harvesting of the male parent and the female parent and selection based on grain thickness, thereby simplifying seed production for a hybrid rice.
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