关键词: 水稻两用核不育系, 繁殖, 早穗, 防治技术, 补救措施

Abstract:

Early ear phenomenon occurred in the breeding of dual-purpose nuclear sterile line, which not only affected the reproduction yield but also caused the difficulty of removing miscellaneous plants. Through the investigation and analysis of the causes of the early ear of the dual- purpose nuclear sterile line, it is related to the characteristics of varieties, climate reasons, environmental conditions and improper cultivation management. Effective measures should be taken to prevent early panicle, such as determination of suitable sowing date and seedling age, strictly control the sowing amount and improve seedling quality by fertilizing seedling field. Appropriate technical measures may also be adopted to remedy fields that may or have occurred early spikes.

Key words: rice dual- purpose nuclear sterile line , breeding , early ear , prevention and control techniques, remedial measure