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갈겨니(Zacco temmincki)의 진화에 관한 연구 IV. 유전적 변이, 형태비교 및 인공교배

Evolutionary Study on the Dark Chub (Zacco temmincki) IV. Genetic Variation, Morphology and Artificial Hybridization

한국동물학회지 1987년 30권 4호 p.417 ~ 431
양서영, 민미숙,
소속 상세정보
양서영 ( Yang Suh-Yung ) - 인하대학교 생물학과
민미숙 ( Min Mi-Sook ) - 인하대학교 생물학과

Abstract


Isozyme analysis, morphometric comparison, and artificial hybridization test wereperformed to elucidate the patterns of genic variation, morphological differentiation, genetic incompatibility, and a probable path in speciation between two MDH allelotypes (MM type and MS type) of the Dark Chub Zacco temmincki, a fresh water fish inhabiting in Korean waters. The degree of genic variation of MS type(HD=.023, HG=.021) was twofold higher than that of MM type (HD=.013, HG=.014) but both allelotypes were far less than the average genic variation of fresh water Bish in general. The average genetic similarities among 7 populations of MM type and 6 Populations of MS type were S=.947 and S=.966 respectively, whereas the value between two allelotypes was S=.853. Presumed divergent time of two allelotypes was estimated to be about 700 thousand years ago. Discriminant function analysis based on 18 morphometric characters of 302 specimens representing 12 populations revealed no morphological difference between two allelotypes. Artificial hybridization test indicates that there is an obvious genetic incogpatibility between two allelotypes and therefore it is assumed that isolating mechanism is completed.

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