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KMID : 0364219880310010001
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Korean Journal of Zoology
1988 Volume.31 No. 1 p.1 ~ p.10
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Natural Kybricization and Reproductive Isolating Mechanisms between Two Species of Rana nigmmaculata and Rana plancyi (Anura)
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Yang Suh-Yung
Yu Chai-Hyeock
Park Byung-Sang
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Abstract
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A syrnpatnc sample of Rana nigrnmaculata sand R plancyi (Anura) from Kwangu, Korea was investigated to clarify their taxonornic status and to estimate the degree of genic variation, genetic relatedness, and reproductive isolation between them, based on electrophoretic analysis, marphometric data, mating call, mating season, and habitat. All the characters measured including morphometric, genetic, behavioral, and ecological suggest that they are distinct species and R nigrnmaculata might have originated from R plancyi (tropical form about three and a half million years ago. An adult female was found to be Fl hybrid between two species The hybrid female possessed fettile eggs and morphologically intermediate to the parental species in head parts, hind limb, and web characters. The differences in mating call, mating behavior, breeding season, and habitat strongly suggest that postmating isolating mechanism is operating, even though very rare hybrid is found.
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KEYWORD
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Rana plancyi , Rana nigromaculata , Isolating mechanism
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