【摘要】 以98份速生型大白菜种质为研究对象，选用与抽薹开花相关的7个主要特征性状为耐抽薹性评价指标，进行相关性分析、主成分分析和隶属函数分析，综合评价速生型大白菜种质的耐抽薹性。结果表明，蕾期薹高变异系数最大，开花期的变异系数最小。相关性分析表明，现蕾期与开花期存在极显著正相关，说明观测现蕾期和开花期均可以判定试材的抗抽薹性，简单可靠。开花期薹高与薹高差存在极显著正相关，说明开花期薹高可以表明材料的抽薹速度。主成分分析将7个指标转化为2个主成分因子，累计贡献率达79.325 2%。采用隶属函数法将98份种质划分为3个类型，筛选出耐抽薹种质11份。更多还原

【Abstract】 Taking 98 fast-growing Chinese cabbage germplasm as research objects, 7 main characteristic traits related to bolting and flowering were selected as the evaluation indicators for bolting tolerance. Correlation analysis, principal component analysis, and membership function analysis were conducted to comprehensively evaluate the bolting tolerance of fast-growing Chinese cabbage germplasm. The results showed that the highest coefficient of variation was the bud stage,while the lowest coefficient of variation was the flowering stage. The correlation analysis showed that there was a highly significant positive correlation between the budding stage and the flowering stage, indicating that observing both the budding and flowering stages could determine the resistance of the tested materials to bolting, which was simple and reliable.There was a highly significant positive correlation between the height of flowering period and the height difference of flowering period, indicating that the size of flowering period could indicate the bolting speed of the material. Principal component analysis converted 7 indicators into 2 principal component factors, with a cumulative contribution rate of79.325 2%. The 98 germplasm resources were divided into 3 types using the membership function method, and 11 germplasm resources were screened for their resistance to bolting.更多还原