Phylogenetic analysis of cytochromeb sequences in the dasyurid marsupial subfamily phascogalinae: Systematics and the evolution of reproductive strategies |
| |
Authors: | Carey Krajewski Larry Buckley Patricia A Woolley Michael Westerman |
| |
Institution: | (1) Department of Zoology, Southern Illinois University, 62901-6501 Carbondale, Illinois;(2) School of Genetics and Human Variation, La Trobe University, 3083 Bundoora, Victoria, Australia;(3) School of Zoology, La Trobe University, 3083 Bundoora, Victoria, Australia |
| |
Abstract: | We report DNA sequence variation in 861 bp of the mitochondrial cytochromeb gene from 10 species of the dasyurid marsupial subfamily Phascogalinae (including the New Guinean genusMurexia) and an outgroup planigale (Planigale ingrami). Phylogenetic analyses of these sequences indicate that (1) the subfamily consists of three major clades corresponding to (a)Phascogale, (b) AustralianAntechinus, and (c) New Guinean Antechinus andMurexia; (2) Antechinus habbema constitutes the earliest branch of the New Guinean clade; and (3); Antechinus melanurus and A. naso are sister species within the New Guinean clade. Among Australian antechnuses,A. stuartii andA. swainsonii are more closely related to each other than either is toA. flavipes, a result that is seemingly at odds with all previous systematic studies. Although resolution is limited, it appears thatAntechnius andMurexia species form a clade to the exclusion ofPhascogale. This relationship suggests that male semelparity is not a strong synapomorphy for Australian antechinuses and phascogales, despite its apparent physiological similarity in the two groups.To whom correspondence should be addressed. |
| |
Keywords: | dasyurids Phascogalinae Muricinae cytochromeb molecular phylogeny reproductive strategies |
本文献已被 SpringerLink 等数据库收录! |
|