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期 刊 ：植物遗传资源学报 2016年 17卷 1期

关键词：黄瓜；核心种质；芽期低温耐受性；鉴定评价；

Keywords:Cucumber, Core collection, Cold tolerance at germination stage, Identification and evaluation,

摘 要 ：本试验以15℃为胁迫温度（26℃，CK），对65份黄瓜核心种质进行芽期低温耐受性鉴定评价，结果显示，参试材料的相对发芽率、相对发芽势、相对发芽指数、相对胚根长度、相对鲜重、相对干重的变化范围分别为1.00%-123.00%、0.00%-112.00%、0.00%-70%、13.00%-109.00%、0.00%-100.00%、0.00%-101.00%。表明大部分参试材料在不同程度上受到低温条件的影响，发芽时间推迟、种子活力降低、种芽生长量减少，而少部分材料的种子活力在15℃低温条件下与对照相比差异不明显。利用6项指标的平均隶属度、聚类分析进行综合评价，共筛选出7份芽期强耐冷的黄瓜材料。

Abstract:65 core germplasms were identified and evaluated under 15℃（26℃，CK）at the stage of germination. The results showed that the range of relative germination percentage, relative germination power, relative germination index, relative radicle length, relative fresh weight and relative dry weight were 1.00%-123.00%, 0.00%-112.00%, 0.00%-70%, 13.00%-109.00%, 0.00%-100.00%, 0.00%-101.00% respectively, showing that the seeds vigor and growth ability of most materials were influenced by low temperature and just some of them expressed no obvious difference comparing with CK. 7 accessions with extremely high tolerance were screened out.

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