贵州引进的4个菠萝品种果实主要性状遗传多样性分析

Genetic diversity analysis of fruit main t traits of 4 pineapple varieties introduced by Guizhou Province

为了对贵州省引进的菠萝资源进行果实主要性状评价和遗传改良,以贵州省引进的4个菠萝品种为试材,利用统计分析、相关性分析和方差分析方法对9个果实性状连续两年的遗传多样性进行分析。结果表明:4个菠萝品种间果实主要性状差异较大,变异系数在8.01%~48.46%,具有丰富的遗传多样性,进行遗传改良的潜力较大;可溶性固形物含量、可滴定酸含量、维生素C含量、总糖含量和固酸比的广义遗传力均大于90%,这些果实品质性状受环境因素影响较小;相关性分析中两两性状间有6对达极显著水平,3对达显著水平,果实内在品质组分间的关联性强。方差分析结果表明,不同品种间的多数性状差异是极显著的,在不同年份间多数性状表现差异极显著,可滴定酸含量、维生素C含量、总糖含量、固酸比和单果重年份与品种间的互作效应极显著不同。以上结果为深入研究菠萝果实性状的内在关系奠定了基础,为贵州省引进菠萝资源进行评价及优良种质的定向选育提供了参考依据。

In order to promote the evaluation and genetic improvement of the main traits of the fruits introduced from pineapple resources in Guizhou Province,this study took 4 pineapple varieties introduced from Guizhou Province as experimental materials,and analyzed the genetic diversity of 9 fruit main traits for two consecutive years by statistical analysis,correlation analysis and variance analysis.The results showed that the fruit-related traits varied greatly among the 4 pineapple varieties,with coefficients of variation ranging from 8.01%to 48.46%,which are rich in genetic diversity and have high potential for genetic improvement.The broad-sense heritabilities for soluble solids content,titratable acid content,vitamin C content,and total sugar content and solid-acid ratio were all greater than 90%,indicating that these traits were less affected by environmental factors.The results of the two-by-two comparison of the traits were six pairs at the highly significant level and three pairs at the significant level,suggesting a strong correlation between the intrinsic quality components of the fruits.The ANOVA results showed that most of the traits were highly significantly different among varieties.Most of the traits showed significant differences between years,but the titratable acid content,vitamin C content,and total sugar content as well as the solid-acid ratio and single fruit weight were highly significantly different from the interaction effect between year and variety.The above results laid a foundation for further research on the internal relationship of pineapple fruit traits,and provided a reference for the evaluation of imported pineapple resources and the directional breeding of excellent germplasm in Guizhou Province.