黄瓜种子萌芽期及嫁接砧木幼苗期耐盐力评价

【目的】进行黄瓜不同基因型和嫁接砧木耐盐性的筛选。【方法】对20个黄瓜品种种子萌发期和22个嫁接砧木幼苗期的耐盐力进行鉴定，对黄瓜种子相对发芽势、相对发芽率、相对发芽指数等耐盐力指标和嫁接砧木的盐害指数进行聚类分析。【结果】20个黄瓜品种中，早多佳、华早2号、中农8号、津育1号、津优3号为耐盐力强的黄瓜品种，津冠1号、许优1号 、津春5号、津春4号、东方明珠、湘早3号、特早1号、津优1号为中等耐盐黄瓜品种，白皮黄瓜、宁丰8号、美农4号、津春3号、津杂4号、津杂2号、津春2号为耐盐力弱的黄瓜品种；22个嫁接砧木中，可分为二大类，其中，春白玉西葫芦、早青一代西葫芦、铁将军F1南瓜、极早秀玉西葫芦为耐盐力弱的品种，其它为耐盐力强的品种。耐盐力强的砧木品种可分为3个亚类，孝感瓠瓜、同心瓠瓜、汉龙碧玉瓠瓜、超丰8848瓠瓜耐盐力很强，黑籽南瓜耐盐力强，其它13个品种耐盐力较强。【结论】黄瓜不同基因型和嫁接砧木的耐盐性具有较大差异，在黄瓜种子萌发期和嫁接砧木苗期可对其耐盐性进行快速鉴定。

Evaluation of Salt Resistance of Cucumber at Seed Germination and Rootstock-Seedling Stages

【Objective】Salt resistance ability screening of different genotypes of cucumber (scion) and rootstock is the basis research work for the evaluation of salt resistance ability. 【Method】Salt resistance of 20 cucumber cultivars at seed germination stage and 22 species of rootstocks at seedling stage were evaluated by using cluster analysis. Relative trend of germination, relative percentage of germination and relative germination index of cucumber seed and salt injury index of rootstock were used to detect the salt resistance of cucumber seeds and rootstock. 【Result】Zaoduojia, Huazao 2, Zhongnong 8, Jinyu 1 and Jinyou 3 held high resistance to salt stress, whereas Jinguan 1, Xuyou 1, Jinchun 5, Jinchun 4, Dongfangmingzhu, Xiangzao 3, Tezao 1 and Jinyou 1 were moderately salt tolerant, but Baipihuanggua, Ningfeng 8, Meinong 4, Jinchun 3, Jinza 4, Jinza 2 and Jinchun 2 cucumber cultivars were sensitive to salt stress. Rootstocks could be clustered to two groups, Cucurbit pepo L. cv. Chunbaiyu, Zaoqingyidai and Jizao xiuyu, Cucurbita moschata Duch. cv. Tiejiangjun F1were sensitive to salt stress whereas the other species of rootstocks were tolerant to salt stress, and salt resistant rootstocks could be clustered to three subgroups, Lagenaria siceraria Standl. var. clavata Makino cv. Xiaoganhugua, Tongxinhugua, Hanlongbiyu and Chaofeng8848 showed the highest salt resistance, Cucurbit ficifolia cv. Heizinangua exhibited tolerant, whereas the other thirteen species showed more salt resistance. 【Conclusion】Salt resistance ability varied with different genotypes of cucumber(scion) and rootstock, and the salt resistance ability of cucumbers and rootstocks could be screened at germination stage and seedling stage, respectively.