‘培矮64S’在长沙、海口、南昌三地的育性差异分析

Fertility Differences Analysis of Hybrid Rice‘Pei’ai64S’in Changsha, Haikou and Nanchang

为了分析同一的超级杂交稻在不同气候区域的育性表现,以不育系‘培矮64S’为材料,研究其在海南、湖南、江西3个气候区域的育性表现。结果表明,同一不育系在不同的气候区域其敏感期存在很大差异‘,培矮64S’在湖南长沙敏感期在开花前的0～8天之内,既第Ⅶ期和Ⅷ期;在海南海口的敏感期处在开花前的13～19天之内。既第Ⅲ期和Ⅳ期;在江西南昌的敏感期处在开花前的15～20天之内,既第Ⅲ期和Ⅳ期。自然条件下,不育系‘培矮64S’在长沙,从2010年7月17日至10月7日不育度都在>98.0%以上,其他时段波动很大;在海口,从2010年5月11日至10月18日不育度均>99.5%,自交结实率均<0.5%,偶有波动;在南昌,从2010年7月12日至10月11日不育度都在>97.0%以上,自交结实在0.00%～0.85%之间波动。由此可见,在海南海口制种最安全,而且育性稳定时间最长,长达5个月。

In order to analyze the fertility expression of one kind of super hybrid rice, we selected the photo-/thermo-sensitive genetic male lines‘Pei’ai 64S’, three different climatic regions were Hainan, Hunan and Jiangxi. The results showed that, the same CMS in different climatic regions there was a big difference in their sensitive period,‘Pei’ai 64S’in Changsha the sensitive periods in the 0-8 days before flowering, ie Ⅶ, Ⅷ period. In Haikou the Ⅲ, Ⅳ periods were the sensitive period; In Jiangxi, the Ⅲ, Ⅳ periods were the sensitive period. Under natural conditions, CMS 64S in Changsha in 2010 from July 17 to October 7, pollen sterility almost all of 98.0%, other time fluctuate large. In Haikou, from May 11 to October 18 in 2010. The pollen sterility were greater than 99.50% from 11 May to 18 October, seed-setting rates all less than 0.50%. In Nanchang in 2010 from July 12 to October 11, pollen sterility almost all of 97.0% , seed-setting rates fluctuate between from 0.00% to 0.85%. Thus, the seed in Haikou, the most secure, and stable sterility longest, as long as five months.