关键词: 油菜, 种子萌发, 品种, 相关性, 综合评价

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