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分析了湖南省2006-2014年审定油菜品种的历年表现、农艺性状变化情况。结果表明,各品种已达到国家“双低”标准,含油量逐年升高;不同密度条件下小区产量变异系数不大,湖南省油菜种质创新还有较大空间;密度增加后,株高、一次有效分枝数等值相应降低;偏相关和通径分析结果表明,高密度条件下应注重群体优势的提高,低密度条件下应注重个体优势的提高;轻简化、机械化条件下,油菜新品种选育应当注重提高单株有效角果数及每角粒数,新品种应具备株高、一次分枝数适中等特征。
The performance of perennial rapeseed varieties in Hunan province during 2006-2014 and the changes of agronomic traits were analyzed. The results showed that all cultivars had reached the national standard of “double low” and the oil content increased year by year. The coefficient of variation of plot yield was not large under different densities, and there was more room for innovation in rapeseed in Hunan. After the density increased, The results of partial correlation and path analysis show that the population superiority should be paid more attention to under the high density condition and the individual superiority should be emphasized under the low density condition. Under the conditions of light simplification and mechanization, Breeding new rapeseed should pay attention to improving the number of pods per plant and the number of grains per square, the new varieties should have plant height, a moderate number of branches characteristics.