关键词: 桃, 果实, 数量性状, 评价指标

Abstract: We try to establish a new peach descrip tor system based on the statistics analysis, international Peach Descriptor from IBPGR in 1984, and Chinese peach descriptor in 1990. Fruit quantitative characters of 282 - 491 peach cultivars were investigated atNational Peach Genetic Collection in Zhengzhou
in China from 1986 - 2002. Those characters includes average fruit mass, stone mass, soluble solid content, soluble sugar content, soluble acid content, vitamin C, firmnesswith shin and firmnesswithout skin.Grade index and reference cultivarswere given by statistical data for peach descrip tors. These grade indexes were recorded on 1 - 5 scale. In generally, two reference cultivars for each grade were given, one USA cultivar, another Chinese cultivar. We try to use these as the reference cultivars, which are planted or used by
breeders widely in China.

Key words: Peach, Fruit, Quantitative character, Evaluation index