用分支分析方法研究中华猕猴桃与美味猕猴桃的亲缘关系

本文根据形态特征和染色体资料,以毛花猕猴桃为外类群,用分支分析法研究美味猕猴桃与中华猕猴桃(含二倍体和四倍体)的亲缘关系,产生了三个步长相等的Wagner树。其中一树能较好地与现有地理分布和细胞学资料吻合。反映出中华猕猴桃二倍体衍生出四倍体类型,二者具有直接祖裔关系:美味猕猴桃与中华猕猴桃是已分支发展的两个分类群,但二者亲缘关系密切。可能属于同一物种复合体的两个近缘物种。

STUDIES ON THE PHYLOGENETIC RELATIONSHIP BETWEEN ACTINIDIA CHINENSIS AND A. DELICIOSA USING CLADISTIC ANALYSIS

Based on morphology and chromosome number data, three identical length Wagner trees (length=28) for three evolutionary units, Actinidia chinensis (including- diploid and tetraploid) and A. deliciosa are constructed, using parsimony analysis with species A. eriantha as outgroup. One of the three trees, which coincides with the geographical distribution and cytological data of the three taxa, is considered to reflect the true phylogenetic relationship among the taxa. This tree shows that A. deliciosa had evolved from A. chinensis rderived from the diploid of the same species. Although A. deliciosa has been revised as a species, it may be one of the members of A. chinensis species complex.