关键词: 桤木, 无性系, 结实量, 种实性状, 遗传与变异

Abstract:

The fruiting quantity and nut and seed characters of different Alnus cremastogyne clones were studied in this paper. The results showed that the fruiting quantity was highly significantly different among different clones and different years, however not different within a clone, which indicated that fruiting quantity was mainly controlled by genetic factors. There were significant or highly significant differences in nut length, width, 1 000grain mass, number of full seed, seed potential and seed efficiency among different clones, which showed abundant genetic variation. However, there were no significant differences in nut length, width, 1 000grain mass and seed potential within the same clone, which showed that the characters were mainly controlled by genetic factors too. Nevertheless, there were significant differences in number of full seed and seed efficiency within the same clones. It would be effective for seed orchard management based on the fruiting quantity and nut and seed characters of different clones.

Key words: Alnus cremastogyne, clone, fruiting quantity, nut and seed characters, genetic variation