Biosystematic Studies on Adenophora potaninii Korsh. Complex (Campanulaceae) Ⅳ. Allozyme Variation and Differentiation-文献传递-植物通论文库

作者：GE Song, HONG De-Yuan

期刊：植物分类学报 1998年 6期

Abstract:

Fifteen natural populations representing all the taxa in Adenophora potaninii

complex were investigated using vertical slab polyacrylamide gel electrophoresis. Allozyme

data for ten loci of seven enzymes demonstrate high levels of genetic variation within popula-

tions, with the values of P＝0.40～0.70, A＝1.5～2.5 and He＝O.102～0.291. At spe-

cific level, there existed the highest variation in A. wawreana (A= 2.10, P=0.63, He

＝0.237), followed by those of A. lobophylla (A＝1.85, P=0.60, He＝0.204) and A.

potaninii (A＝1.83, P＝0.60, He ＝O.188). Based on Wright‘s F-statistics, the out-

crossing rates( t ) were 0.86 ( A.wawreana ), O.74 ( A.potaninii ) and 0.63 ( A.lobo-

phylla). The analysis on population genetic structure indicates that most variation resided

within populations, which is consistent with the high rate of outcrossing rates in the com-

plex. On the basis of genetic identity(I), cluster analysis shows that there was high genetic

divergence between A. lobophylla populations and A. wawreana-A, potaninii clade,

while no clear genetic difference was found between A. wawreana populations and A.

potaninii populations. Consequently, the present allozyme data justify the establishment of

A. lobophylla, but give no support for treating A. wawreana and A. potaninii as a sepa-

rate species.

Biosystematic Studies on Adenophora potaninii Korsh. Complex (Campanulaceae) Ⅳ. Allozyme Variation and Differentiation