| Summary: | 碩士 === 國立臺灣師範大學 === 生物研究所 === 88 === The systematic status between Papilio paris and P. p. hermosanus are controversial, and so far no convincing evidence has been available to elucidate this problem. Characters based upon morphology, ecology, allozyme allele frequency and mtDNA sequence variation were surveyed P. p. nakaharai and P. p. hermosanus from Taiwan, which were compared with P. p. paris from the Asiatic continent. Using samples of P. bianor thrasymedes and P. dialis tatsuta of the bianor-paris species group in Taiwan were served as outgroup taxa in these analyses.
Data from male genital morphology, androconial patch size, eggs size and feeding tests provided clear distinction between P. paris nakaharai and P. p. hermosanus. On the other hand, genetic distance ( D＝0.373, calculated from allozyme data ) between the two taxa revealed that they should be regarded as distinct species. By analyzing a fragment of the mitochondrial COI gene sequence, the phylogenetic relationship of the two taxa also showes they represent independent evolutionary lineages. Consequently two distinct species could be recognized based upon these data, namely, P. paris ranging across Asiatic continent to north Taiwan and the islands where the Sundaland located, and P. hermosanus endemic to Taiwan.
The results of this study suggest that the hypothesis of allopatric speciation was supported. In other words, P. paris might be derived from a recent dispersal to Taiwan during last glacial stage of Quarternary, but they were already genetically and phenotypically isolated from P. hermosanus, which were descents of previous invasion at the time
|
|---|
