杧果种质资源果实主要数量性状评价指标探讨

Evaluation Index of Main Quantitative Characters of Mango (Mangifera indica) Genetic Resources

以77～80份杧果品种(种质)资源为试材,对各品种果实的单果重、外果皮厚度、果核重、可食率、可溶性固形物含量、可溶性总糖含量、可滴定酸含量和维生素C含量等8项数量性状指标进行测定。结果表明,除了可食率外,其余7个数量性状均存在10%以上的变异系数,外果皮厚度、可食率、可溶性固形物含量和可溶性总糖含量呈正态分布,其余呈偏态分布。根据分析结果,提出了性状分级标准为1～5个等级,每个等级提出2个参照品种:1个国外品种、1个国内品种。该研究为我国杧果种质资源描述系统数量化、规范化的建立或完善奠定了基础。

Eight quantitative characters（including average fruit weight,fruit skin thickness,stone weight,edible ratio,soluble solids content,soluble sugar content,ttitratable acid and Vitamin C） of 77-80 mango cultivars were investigation.The investigation results showed that the quantitative characters and their coefficients of variation were above 10% except edible ratio and all of them were in normal distribution except average fruit weight,stone weight,ttitratable acid and vitamin C.Grade index and reference cultivars were given by statistical data for fruit description.These grade indexes were recorded on 1-5 scales.In general,the suggestions of two reference cultivars for each grade were given,one overseas cultivar,another Chinese cultivar.The research will establish bases for the quantization and standardization of mango germplasm descriptor system.