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1 选择最佳制种生态时期母本两用不育系对生态的要求是:育性转换敏感期稳定不育的日平均气温最高值是28℃,只有日均温≤28℃、日最高温度32℃以下,其不育株率才能达到100%,不育度为100%。根据宁远县近40年的气象资料分析和3年来的生态育性观察试验,春季制种播期安排在3月25日,育性转换敏感期在6月5日以前;秋季制种播期安排在7月28日,育性转
1 The selection of the optimal ecological system during the breeding period of the female parent dual-use sterile lines on the ecological requirements are: fertility conversion sensitive period stable sterile the highest average daily temperature is 28 ℃, only the average daily temperature ≤ 28 ℃, daily maximum temperature Under 32 ℃, the rate of sterile plants can reach 100% and the sterility is 100%. According to Ningyuan County nearly 40 years of meteorological data analysis and three years of ecological fertility observation test, spring planting sowing date arranged on March 25, fertility transition sensitive period before June 5; autumn planting sowing date arrangement On July 28, fertility turned