【摘要】 用云南和日本的水稻品种研究花器状性与耐寒性状的关系;结果看出:花药和柱头的长度在品种间有明显差异,花药长的品种耐寒性强,短的耐寒性弱。云南粳稻的花药一般比日本品种长,初步说明了云南品种的耐寒性强于日本品种的原因。花药长度与每药内充实花粉数及相对结实率均呈高度正相关,而且药长受环境影响比空秕指数的变动小。因此,花药长度可作为水稻品种耐寒性强弱的形态指标。更多还原

【Abstract】 Some rice varieties derived from Yunnan and Japan were selected to study the relationship between flower organ characters and cold tolerance. Evidence indicated that significant differences existed in the length of anther and stigma in rice varieties. Varieties with long anthers were more tolerant to low temperature than those with short ones. In general, the anthers of Yunnan’s Keng varieties (japonica) were longer than those of Japan. It might give an explanation of why the cold tolerance in Yunnan varieties was high. There was significantly positive correlation between anther length and its full-grown pollen number or seed-setting percentage, and anther length was less affected by envionment than empty shrunken grain index.So the anther length could not be only used as a standard morphological character to evaluate cold tolerance, but provides obvious effect for screening single plant, systematic selection and recurrent female parent determinaton in rice breeding for cold tolerance.更多还原