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- W2371082014 abstract "11 characters of the four subspec;es of Rana chensincnsis, including morphology, chromosome and LDH isoenzyme, have been analysed with the method of cladistics. The phylogenetic cladogram of the subspecies is presented (Fig. 1).According to the analysis of the characters, ancient geography and climate, it seems reasonable to propose that the east of Lena River in Siberia may probably be the place where Rana chensinensis might have its origin. The glacial epoch of the fourth period forced Rana chensis-ensis move to the south of Asia and it adaptd to new environment and speciated.According to the degree of similarity of the present and original living environments, it is worthy of note that initially speciating subspecies may have more plesiomorphies or more ap-omorphies.Traditionally speaking, there are two theories about the original place, one is that the form of a low level of development in the process of evolution as a more or less reliable indicator of the dispersal center of the taxon, i, e, the nearer the species is to its original center, he lower it is at the level of development; the other is that the form of a comparatively lower level are all excluded to the peripheral region of the distributional range of the taxon. But our study shows that the changed factors of the environment should be considered in determination of the origin center on tht basis of morphology. While the environment did not change or changed the same way all over the distribution, the distributional area of the form with the most plesiomorphies might be the original center of the taxon." @default.
- W2371082014 created "2016-06-24" @default.
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- W2371082014 date "1990-01-01" @default.
- W2371082014 modified "2023-09-25" @default.
- W2371082014 title "ON THE PHYLOGENETIC RELATIONSHIP AND SPECIATION OF RANA CHENSINENSIS" @default.
- W2371082014 hasPublicationYear "1990" @default.
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