桃92个品种的花粉量及其萌发特性的差异

Cluster Analysis for the Quantity and Germinating Characteristics of the Pollens from 92 Peach Cultivars

在离体条件下,以92个桃品种为研究对象,探讨其花粉量及其萌发特性的差异。结果表明：单个花药的花粉量变化范围为0-3500粒,可萌发花粉量为0-2696粒,花粉萌发率为0-89.33%,花粉管生长长度为0-1.56mm,品种间存在明显的差异。上述指标品种出现频率均不符合正态分布。对上述各项因子分别进行聚类分析,供试品种中可萌发花粉量少且花粉管生长速度慢的品种相对较多,占45.65%,这类品种在生产上应合理配置授粉树。

Variation analysis for the quantity and germination characteristics of pollens was carried out in vitro on 92 peach genotypes. Significant variations on the quantity of the total pollens and germinated pollens , germination rate and length of the pollen tubes were observed among the different genotypes, which were estimated to be 0–3 500 grains per anther, 0–2 696 grains per anther, 0–89.33% and 0–1.56 mm respectively, and the model of these data did not correspond with Gaussian distribution. Further investigation on the pollination value of different peaches was performed based on cluster analysis on above data. The population of the cultivars with low germinated pollen quantity and shorter pollen tube length is relatively larger, accounting 45.85% of the total tested cultivars. So the pollination cultivars should be arranged for such cultivars above.