【摘要】 通过对 1 0个水稻品种的花器性状与结实率的分析 ,表明水稻孕穗期受低温冷害后 ,花药缩小 ,花药内可育花粉数减少 ,不育花粉数增多 ,结实率下降 ,其中花药内的可育花粉数对水稻的结实率起着决定性的作用。提出了水稻耐冷性育种的对策更多还原

【Abstract】 The properties of the floral organs of 10 cultivars of Oryza sativa L. and their seed-setting were investigated in Yunnan. The results indicated that anther size and fertile pollen number decreased, sterile pollen increased and fertility rate declined in low temperature treatments. Fertile pollen number in the anthers was considered to be the critical factor affecting the fertility of rice. Some measures for rice breeding against cold injury are offered.更多还原