湖南省油菜品种农艺性状分析

Analysis on Agronomic Traits of Rape Varieties in Hunan Province

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 and changes of agronomic traits for approved rape varieties from 2006 to 2014 in Hunan province were analyzed in this paper. The results showed that all varieties reached the national standard of ＂double low＂ for rape variety, and their oil content increased year by year. The coefficients of variation of each plot yield under high or low densities were not significant, so, there was still more potential for germplasm creation of rape in Hunan province. Stem height, number of the 1 st effective branches and other traits decreased as the density increased. Partial correlation analysis and path analysis of several agronomic traits showed that the improvement of population advantage should be emphasized under high density and the improvement of individual advantage should be emphasized under low density. In summary, the improvement of total pods and seeds per pod should be emphasized on rape breeding, and stem height and number of the 1 st effective branches should be well situated under the condition of simple and mechanical planting.