PEG胁迫下新疆主要加工番茄萌芽期耐旱性评价

在PEG模拟干旱胁迫下，对新疆14个主要加工番茄品种进行萌芽期和幼苗期耐旱性鉴定。在PEG半致死浓度（11.4%）下，对加工番茄发芽率、发芽势、发芽指数、胚根长度、幼苗鲜重、幼苗干重等指标进行聚类分析和差异比较。结果表明，不同基因型加工番茄的耐旱性能具有较大差异。14个加工番茄品种中，早得、佳禾红运、石红15号、红果3号、麒麟钻石为耐旱性较强品种，里格尔87-5、美国世纪红、佳禾9号、新选里格尔87-5、昌农020耐旱性较弱，石红6号、麒麟020、麒麟87-5、佳义200耐旱性最差。加工番茄萌发能力参数聚类分析和幼苗生长参数差异分析结果较为一致，在加工番茄萌芽期和幼苗期可对其耐旱性进行快速鉴定。

Drought Tolerance Analysis of Main Processing Tomato Cultivars from Xinjiang by PEG Stress during Germination Stage

In order to evaluate drought tolerance of main cultivars of Xinjiang processing tomatoes, the germination and seedlings characters of 14 processing tomato cultivars were investigated under half lethal PEG concentration (11.4%). Several indexes including sprouting rate, sprouting trend, sprouting index, the radicle length, fresh wet and dry wet of seedlings were investigated and cluster analysis was utilized. Results indicated drought tolerance varied among different processing tomato genotypes. Among 14 processing tomato cultivars, relative higher drought tolerance exists in Zaode, Jiahehongyun, Shihong15, Hongguo3 and Qilingzhuanshi; relative lower drought tolerance exists in Ligeer87-5, American Red, Jiahe9, Xinxuanheigeer87-5 and Changnong020; and the least drought tolerance exists in Shihong6, Qiling020, Qiling87-5 and Jiayi200. The cluster result in germination stage and significance analysis in seedling stage was coherent. The drought tolerance of processing tomatoes could be screened at germination stage and seedling stage respectively.