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

GE Song, HONG De-Yuan

Received:1900-01-01 Revised:1900-01-01 Online:1998-11-10 Published:1998-11-10
Contact: GE Song

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.

Key words: Adenophora potaninii complex, Allozyme, Genetic variation, Population differentiation

GE Song, HONG De-Yuan. Biosystematic Studies on Adenophora potaninii Korsh. Complex (Campanulaceae) Ⅳ. Allozyme Variation and Differentiation[J]. .

[1]	ZHOU Yong-Hong, ZHENG You-Liang, YANG Jun-Liang, YEN Chi, JIA Ji-Zeng. Relationships among Kengyilia species assessed by RAPD markers [J]. , 2000, 38(6): 515-521.
[2]	ZHOU Shi-Liang. Genetic divergence and analysis of the relationships between species of Mosla (Labiatae) [J]. , 1999, 37(1): 10-19.
[3]	ZHOU Qi-Xing, GE Song, GU Zhi-Jian, YUE Zhong-Shu. Genetic Variation and Relationships Within Taxus and Between the Genus and Pseudotaxus in China [J]. , 1998, 36(4): 323-332.
[4]	Ge Song, Hong De-yuan. Biosystematic Studies on Adenophora potaninii Korsh. Complex (Campanulaceae). Ⅰ. Phenotypic Plasticity [J]. , 1994, 32(6): 489-503.

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