Reproductive isolating mechanisms and molecular phylogenetic relationships among Palearctic and Oriental brown frogs

Zoological Science
M SumidaM Nishioka

Abstract

Crossing experiments were made among various brown frog species and populations collected from Japan, China, Russia and Taiwan. The main purpose of these experiments was to confirm the existence of reproductive isolating mechanisms among Rana pirica from Japan, R. chensinensis from China and R. chensinensis from Russia, and between these three taxa and the other brown frogs distributed in the Palearctic and Oriental regions. It was found that there was no or a slight gametic isolation among the three taxa. While there was a nearly equal number of male and female offspring in the control groups, the hybrid frogs were all males, and completely sterile upon attaining sexual maturity. Thus, each of the Japanese R. pirica and the Russian R. chensinensis is a valid species, distinct from the Chinese R. chensinensis. The phylogenetic tree based on nucleotide sequence data from the mitochondrial 12S and 16S rRNA genes of the Palearctic and Oriental brown frogs showed that the three taxa are included in a cluster together with the other species with 2n=24 chromosomes. The present crossing experiments and molecular data support the hypothesis that each of them is a separate but closely related species.

Citations

Oct 6, 2009·Toxicon : Official Journal of the International Society on Toxinology·J Michael ConlonShawichi Iwamuro
Aug 11, 2007·Toxicon : Official Journal of the International Society on Toxinology·J Michael ConlonShawichi Iwamuro
Aug 25, 2006·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·J Michael ConlonPer F Nielsen
Jan 18, 2006·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·J Michael ConlonShawichi Iwamuro
Sep 10, 2020·ELife·Asher D Cutter, Joanna D Bundus
Jul 25, 2017·Mitochondrial DNA. Part B, Resources·Peng LiuWenge Zhao

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BETA
PCR

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CLUSTALW

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