红河流域杧果种质资源主要数量性状变异与概率分级

为更好地开展杧果种质资源筛选工作,对杧果种质资源进行评价。以86份红河流域杧果种质资源为研究材料,对9个主要数量性状进行统计分析及概率分级。结果表明,9个性状变异系数范围是4.7%~28.81%,变异系数最大的是单果重,最小的是果实宽度。K-S检验显示,叶长、叶宽、叶柄长、可溶性固形物等4个性状均符合正态分布;单果重、果长、果宽、果厚、可食率等5个性状呈偏态分布,去除拖尾部分,也近似看作正态分布。9个数量性状均采用(X-1.2818S)、(X-0.5246S)、(X+0.5246S)、(X+1.2818S)4个点分为5级,使性状1~5级出现的概率分别为10%、20%、40%、20%和10%。相关性分析表明,果实单果重与果长、果宽、果厚、可食率呈显著正相关。本研究的开展可为杧果种质资源的评价及优异种质资源的筛选提供参考。

Variation and Probability Grading of Main Quantitative Traits of Mango Germplasm Resources in the Honghe River Basin

To carry out the screening of mango germplasm resources, the mango germplasm resources were evaluated. 9 major quantitative traits of 86 mango resources of the Honghe River Basin were studied by statistical analysis and probability grading. The results showed that the variation coefficient of the 9 major quantitative traits (leaf length, leaf width, petiole length, single fruit weight, fruit length, fruit width, fruit thickness, edible rate, and soluble solids content) was 4.7%-28.81%. Among the 9 major quantitative traits, the single fruit weight showed the maximum variation whereas the fruit width showed the minimum variation. According to the K-S test, leaf length, leaf width, petiole length and soluble solids content all conformed to the normal distribution. Single fruit weight, fruit length, fruit width, fruit thickness and edible rate followed skewed distribution, except the trailing part, which was also approximately regarded as normal distribution. The values of normally distributed traits could be divided into 5 grades by dividing points: (X-1.2818S), (X-0.5246S), (X+0.5246S) and (X+1.2818S). Occurrence probability of 1 to 5 grade was 10%, 20%, 40%, 20% and 10%, respectively. According to the correlation analysis, fruit weight per fruit was significantly and positively correlated with fruit length, fruit width, fruit thickness and edible rate. In summary, reference for evaluating and screening of excellent mango germplasm resources can be provided by this paper.