日本産モロコ類の核学的分類

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概要

• 論文の詳細を見る

• Karyotypes of all species of Gnathopogon and Squalidus inhabiting Japan (G. elongatus, G. caerulescens, S. chankaensis biwae, S. c. subsp. (Japanese name: korai-moroko), S. japonicus japonicus, and S. gracilis gracilis) were analyzed by conventional staining and Ag-NOR banding techniques. Both Gnathopogon species had 50 chromosomes in diploid number, and their chro-mosome complements each consisted of 7 pairs of metacentric and 18 pairs of submeta-and subtelocentric chromosomes (including 2 pairs of sat-chromosomes, with NORs). Of the four Squalidus species, each had a diploid chromosome number of 50, and the chromosome comple-ment in each case consisted of 10 pairs of metacentric and 15 pairs of submeta-and subtelocentric chromosomes (including a single pair of sat-chromosomes, with NORs). In this study, karyo-of F1 hybrids types of S. g. gracilis (female) and G. caerulescens (male) were examined. Accord-ing to the chromosomal configuration of both parental species, chromosome size in Gnathopogon was found to be essentially the same as that of Squalidus. Fish belonging to these genera have been classified into genus Gnathopogon collectively, or into genera Gnathopogon and Squalidus separately. Karyotypic data presented here support the latter classification. It has recently come to be considered that Gnathopogon should be assigned not to the subfamily Gobioninae but to Barbinae. However, no precise solution to the problem could be obtained by the karyotype analysis.

• 日本水産學會の論文

著者

• 上野 紘一

  近畿大学農学部

• 葉 雲娟

  近畿大学農学部

• 梅岡 隆

  近畿大学農学部

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• 日本産モロコ類の核学的分類

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