Abstract: In order to discuss the seed germination characteristics of different genotype rapeseed varieties in the Yangtze River basin, this paper selected 23 rapeseed varieties with different genotypes from the planting areas in the middle and upper reaches of the Yangtze River and carried out seed germination and seedling emergence test in a light incubator to analyze the correlation and membership functions of 14 parameters describing seed germination and seedling characteristics. The results showed that: Among all these 23 different genotypes, the seedling vigor index, root length, seedling stem dry and fresh weights of Zhongshuang 11 and Youyan 10 were the highest, which ranked at the front through membership function analysis. The stem dry weight and 1 000-grains weight were the lightest of Jinhuanghou and Ronghuayou 6, which ranked at the bottom. The 7 varieties with an average degree of membership over 0.52 were Zhongshuang 11, Zhongyou 589, Liangyou 9, Youyan 10, Youyan 50, Zhiyuanyou 8 and Qinyou 6. These cultivars had relatively high parameters, such as seedling vigor index, root length, dry and weight of seedling stem, 1 000-grains weight, etc.. These research results provided theoretical basis and practical references for selecting varieties for simplified & direct seed planting of rapeseed in the Yangtze River basin.

Key words: rapeseed, seed germination, variety, correlation, comprehensive evaluation

摘要： 为探讨长江流域不同基因型油菜品种的萌发出苗特性，选取了23个来自长江中、上游种植区域不同基因型油菜品种，在光照培养箱中进行了种子萌发出苗试验，并对其主要表征萌发出苗特性的14个参数进行了相关性及隶属函数分析。结果表明：在23个不同基因型油菜品种中，隶属函数分析综合排名在前的中双11号和油研10号油菜萌发出苗时的幼苗活力指数、根长、幼苗茎干鲜重最大；综合排名靠后的金皇后和荣华油6号，其幼苗的茎干重和千粒重最小。平均隶属度＞0.52的7个品种依次为中双11号、中油589、亮油9号、油研10号、油研50、志远油8号和秦油6号，这些品种在萌发出苗时幼苗的活力指数、根长、幼苗茎干鲜重和千粒重等参数相对较高。研究结果可为长江流域油菜轻简化直播种植的品种选择提供理论依据和实践参考。

关键词: 油菜, 种子萌发, 品种, 相关性, 综合评价