黄瓜不同生态型品种资源耐湿热性鉴定

Identification of Hot-humid Tolerance of Different Ecotype Cucumber Cultivars

针对黄瓜品种资源耐湿热性尚无系统鉴定,制约耐湿热性育种和生产品种选择的科学和产业问题,采用前期建立的鉴定方法对3个生态型71个黄瓜品种的耐湿热性进行鉴定。结果表明,供试品种的耐湿热值在1.940~3.084之间,其中3个品种耐湿热值低于2.0,对湿热极敏感;16个品种耐湿热值在2.0~2.4之间,对湿热敏感;46个品种耐湿热值在2.4~3.0之间,耐湿热;6个品种耐湿热值高于3.0,极耐湿热。聚类分析在欧式距离15处可将71个品种分为耐湿热型、较耐湿热型和不耐湿热型3大类。总体而言,欧洲温室型黄瓜品种以耐湿热型为主,也有不耐湿热的品种;华南型黄瓜品种以较耐湿热型为主,也有耐湿热的和不耐湿热的品种;华北型黄瓜品种以不耐湿热型为主,也有较耐湿热的和耐湿热的品种。研究结果可为黄瓜耐湿热育种中材料选择和湿热环境下黄瓜生产品种选择提供直接依据。

Aiming at the scientific and industrial issues including no systematic identification for humidity resistance of cucumber varieties,restriction for humidity breeding,and choice for producing varieties,this study carried out identification on humidity resistance of 71 cucumber varieties from 3 ecotypes by using identification method established earlier.The results showed that the humidity resistance values of these experimental varieties were between 1.940-3.084.Among them,the humidity resistance values of 3 varieties were lower than 2.0,showing extrame sensitive to humidity.There were 16 varieties with humidity resistance values between 2.0-2.4,showing sensitive to humidity.There were 46 varieties with humidity resistance values between 2.4-3.0,showing resistance to humidity.There were 6 varieties with humidity resistance values higher than 3.0,showing extreme resistance to humidity.These 71 varieties were divided by clustering analysis into 3 groups at 15 european distance,namely humidity resistance type,more resistant to humidity type,and not resistant to humidity type.Generally speaking,varieties of european greenhouse type are mainly resistant to humidity,but there are still varieties not resistant to humidity.Varieties of South China type are mainly more resistant to humidity,but there are also varieties resistant and not resistant to humidity.Varieties of North China type are mainly not resistant to humidity,but there are still varieties more resistant or resistant to humidity.These results can provide direct evidences for material selection in cucumber humidity resistance breeding,and selection of production varieties in cucumber cultivation under humidity environment.