杂交籼稻成熟期倒3节间倒伏指数与亲本的关系

以籼型三系不育系宜香1A、II-32A、冈46A和恢复系宜恢7633、宜恢7008、宜恢1525等为材料,通过对亲本和杂交后代倒3节间倒伏指数的分析,发现母本、父本倒3节间倒伏指数存在较明显的差异,这种差异直接影响着后代的倒3节间倒伏指数的变化,特别是母本对后代的影响效果更为显著。即父母本倒3节间抗倒能力强,则后代也表现强的抗倒力,同时也受父母本间的互作效应和它们与环境的互作效应的综合影响。

Relationship of resistant index of the third internode to the top of crossing cultivars during riped stage and their parent rices

Using the material of 3 CMS lines (Yixiang1A, Ⅱ -32A and Gang 46A) and 7 restorer lines (Yihui7633, Yihui7008, Yihui1525, etc.) made analysis on their resistant index of the third internodes to the top and their relationships with parent rices. It is found that there were significant differences for parent rices' resistant index. These significant differences had been brought to their crossing cultivars and especially the female parent's functions were more significant. The crossing cultivars had strong lodging resistance if their parents existed strong lodging resistance and the crossing cultivars' performance of lodging resistance also affected by genotype and environment interaction.