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2000—2009年对光温敏核不育系陆18S进行分期播种试验结果表明,陆18S播始历期随温度、日照长短的变化而变化。低温时间越长、平均日均温越低、最低日均温越低.陆18S育性转换程度越高,可育花粉率越高,在日均温20～23℃、持续时间15～20 d的条件下育性能较好的完成转换。根据陆18S的育性转换特点,笔者总结出其在郴州地区繁殖和制种最佳的“三期”安排:春繁,播种期安排在3月底,育性敏感期在5月底6月初,扬花期在6月中下旬;秋繁,播种期安排在6月底7月初,育性敏感期在9月初;繁殖时育性敏感期间同时结合冷水灌溉降温;制种,母本播种期安排在5月底,育性敏感期在7月初,扬花期在7月中下旬。
In 2000-2009, photosynthetic temperature-sensitive genic male sterile line Lu 18S was sown in stages. The results showed that the initial duration of Lu 18S varied with temperature and sunshine duration. The longer the low temperature, the lower the average daily temperature and the lower the minimum daily average temperature.The higher the degree of fertility transformation of land 18S, the higher the fertile pollen rate, the average daily temperature of 20 ~ 23 ℃, the duration of 15 ~ 20 d Under the conditions of fertility better completion of the conversion. According to the characteristics of fertility transformation of Lu 18S, the author concluded that “Breeding” and “Three Phases” arrangements of breeding and seed production are the best in Chenzhou area. Spring planting and sowing are arranged at the end of March, and fertility sensitive period is at the end of May and early June. Flowering in late June; autumn, sowing period arranged in late June early July, fertility sensitive period in early September; reproductive fertility sensitive period at the same time combined with cold water irrigation cooling; seed production, female parent sowing schedule arranged in 5 End of the month, fertility sensitive period in early July, flowering in late July.