Abstract: The relationship between fall grain rate of hybrid combinations and its parents were studied, using 16 cross combinations from four sterile lines and four restorer lines as materials, by a kind identification device of fall grain rate. The results indicated that there were significant effects of sterile lines and the interactions of sterile lines and restorer lines on fall grain rate of hybrid combinations, but no significant differences between restorer lines. The fall grain rate of hybrid combinations from sterile lines R18A is high, and the fall grain rate of hybrid combinations from D1716A is low. In this test, the fall grain rate of R18A/R7329 and 2394A/R7329 are higher, and the fall grain rate of D1716A/R727, D1716A/R7329, 2394 A /R642 are lower.

Key words: rice, parents, hybrid combination, fall grain rate

摘要： 以4个不育系和4个恢复系配制的16个杂交组合为材料，利用自主研发的一种鉴定水稻落粒性的装置，研究了亲本对其所配组合落粒性的影响。结果表明，落粒率主要受不育系以及不育系与恢复系互作的影响，恢复系间的差异不显著；以不育系R18A配制的杂交组合落粒率较高，而以D1716A配制的杂交组合落粒率较低；落粒率较高的杂交组合有R18A/R7329、2394A/R7329，落粒率较低的杂交组合为D1716A/R727、D1716A/R7329、2394A/R642。

关键词: 水稻, 亲本, 杂交组合, 落粒率