Abstract: Path analysis was used to assess the relation between ratooning ability of intersubspecific hybrids and agronomic characters of mother plant. Days to heading and effective panicles directly affected ratooning ability more significantly. Number of grain per panicle indirectly influenced ratooning ability through No. of effective panicles. The heritable complexity and breeding strategy for rice ratooning were discussed.

Key words: Intersubspecific hybrid, Oryza sativa, Path analysis, Ratooning ability

摘要： 对水稻亚种间杂种再生力与头季稻主要农艺性状的通径分析表明， 出穗期和有效穗数对杂种再生力有极显著的直接作用，出穗期的直接作用最大。每穗粒数通过有效穗数间接影响杂种再生力，亚种间杂种的超亲晚熟和超亲优势普遍存在并呈极显著正相关。讨论了作为复合性状的再生力的遗侍基础的复杂性及其改良措施。

关键词: 亚种间杂种, 再生稻, 农艺性状, 水稻