砧用南瓜品种资源抗旱性鉴定
毕业论文关键词：砧用南瓜；抗旱性；形态指标
Identification for drought resistance of rootstock-used pumpkin cultivars
Abstract：In this experiment，14 rootstock-used pumpkin cultivars were taken as material．They were treated with drought condition at germination（23% PEG-6000）and seedling stages（control the amount of watering），respectively．Their drought resistance was analyzed by unweight pair-group method with arithmetic means（UPGMA） cluster．Eleven property indexes，including germination potential，germination rate，vigor index，germination index at germination stage；stem thickness，plant height，leaf area，fresh weight，dry weight，drought injury index，sound seedling index at seedling stage，etc． were measured．The rootstock- used pumpkin cultivars could be pided into 4 types at germination stage and seedling stage．They were drought resistant，moderate drought resistant，moderate drought sensitive and drought sensitive．In both stages，higher drought resistant cultivars were 9，including‘ Dawei No.10’，‘Jiahetaimu’，‘Jingan No.1’，‘Kunlun’，‘Ribengenlishen’，‘Ribenlyba’，‘Ribenqianglishi’，‘Shenzhen’ and‘ Shengli（white）’．The relative germination rate，germination potential，germination index，vigor index，and plant height could be conducted as credible indexes for drought resistance identification．The relative dry weight could also be used as useful indicators for droght resistance identification．Through comprehensive analysis of these 14 cultivars in salt tolerance，cold tolerance，heat tolerance and drought resistance，it was found that‘ Ribenlyba’ and‘ Ribenqianglishi’ showed strong multi-resistances，these 2 cultivars could be used as high-quality rootstocks in cucumber grafting.
Key words: Rootstock-used pumpkin；Drought resistance；Morphological index
目 录
摘要 1
关键词 1
Abstract 1
Key words 1
绪论 2
1 材料与方法 2
1.1 试验材料 2
1.2 试验方法 2
1.2.1 发芽期抗旱性鉴定 2
1.2.2 幼苗期抗旱性鉴定 3
1.3 测定指标及方法 3
1.3.1 发芽期测定指标及测定方法 3
1.3.2 幼苗期测定指标及测定方法 3
1.4 数据分析 3
2 结果与分析 4
2.1 发芽期抗旱性鉴定 4
2.2 幼苗期抗旱性鉴定 5
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