多元统计分析方法在辣椒品种耐盐性评价中的应用

根据NaCl溶液处理下辣椒萌芽期和幼苗期农艺性状指标，采用多元统计分析方法评价辣椒品种的耐盐性。结果表明：辣椒不同品种间，相对发芽势、相对胚根长、相对发芽指数、盐害指数、相对株高等12个性状指标表现出显著性差异；采用因子分析将此12个性状指标用4个主因子表示，保留了原始变量95.35%的信息量；基于品种因子得分值进行聚类分析，10个辣椒品种分为3类：中椒4号、8号、7号、12号为盐敏感品种，中椒5号、11号为中度盐敏感品种，中椒6号、13号、16号、10号为盐不敏感品种。因此，辣椒品种的耐盐性可通过测定萌芽期和幼苗期农艺性状指标，采用多元统计分析方法予以快速鉴定。

Evaluation of Salt Tolerance of Pepper Cultivars by Multiple Statistics Analysis

This paper was conducted to evaluate the salt tolerance of pepper cultivars by multiple statistics analysis according to agronomic character indexes at seed germination and seedling stage. The twelve character indexes from different pepper cultivars, such as relative trend of germination, relative radicle length, relative germination index, salt injury index and relative plant height etc. showed significant difference by using multiple variance analysis. Factor analysis indicated the twelve character indexes could be synthesized into four main factors, keeping 95.35% of information of primitive variables. Based on the score vectors of the factors, ten cultivars were classified into three categories by using cluster analysis. Zhongjiao No.4, No.8, No.7 and No.12 were salt sensitive cultivars, whereas Zhongjiao No.5 and No.11 were moderately salt sensitive cultivars, but Zhongjiao No.6, No.13, No.16 and No.10 were salt tolerant cultivars. These results indicated the multiple statistics analysis could be used to early evaluate the salt tolerance of pepper cultivars by investigation of agronomic character indexes at seed germination and seedling stage.