8 0 0 0 OA ハンドウイルカとハナゴンドウ間における雑種形成の生化学的証明
- 著者
- 志村 悦子 沼知 健一 瀬崎 啓次郎 廣崎 芳次 渡部 終五 橋本 周久
- 出版者
- 公益社団法人 日本水産学会
- 雑誌
- 日本水産学会誌 (ISSN:00215392)
- 巻号頁・発行日
- vol.52, no.4, pp.725-730, 1986-04-25 (Released:2008-02-29)
- 参考文献数
- 11
- 被引用文献数
- 7 11
Four hybrids produced in an aquarium between the bottlenose dolphin Tursiops truncatus and the whitehead grampus Grampus griseus were analyzed electrophoretically to determine the genotypes coding to some enzymes and to ascertain the intergeneric hybridization in an artificial condition. The results obtained showed that each parental dolphin possessed its own gene (s) coding to each of the 3 enzymes (ICDH, GPI, MPI), and the hybrids had all the genes of the parental species. So was the case with an unidentified band detected on the sarcoplasmic protein pattern. The hybridization thus demonstrated was discussed in relation to the amount of differentiation and maintenance of species in the cetacean.
2 0 0 0 OA 日本の北部海域で産卵するニシン地域性集団間の遺伝的分化
- 著者
- 小林 時正 岩田 宗彦 沼知 健一
- 出版者
- 公益社団法人 日本水産学会
- 雑誌
- 日本水産学会誌 (ISSN:00215392)
- 巻号頁・発行日
- vol.56, no.7, pp.1045-1052, 1990-07-25 (Released:2008-02-29)
- 参考文献数
- 31
- 被引用文献数
- 5 7
Multi-loci analysis coding to isozymes was made of 7 spawning populations of Pacific herring Clupea pallasi collected from 2 coastal waters (oceanic type) and 5 brackish waters (brackish type) in the northern Japan. Genetic polymorphisms were observed at 19 loci among 29 loci coding isozymes by starch gel electrophoresis. Greater degrees of polymorphic varia-tions were observed at the 4 loci in GPI, IDH, ME, and PGM. Average heterozygosities were significantly lower in the oceanic type than those of brackish type. Results of a contigency X2 analysis for homogeneity of allele frequencies over all loci of the samples suggested that these 7 populations are genetically isolated each other. However, the level of genetic distance (D) between them was rather low (D=0.0004-0.0035) and the level of differentiation between samples was estimated to be almost the same as those of local populations of other fish species so far reported. The 7 herring samples were clustered into 2 groups at the D value 0.0024. The first is the oceanic type including two local populations Ishikari and Mangoku-ura and the latter is the brackish type including five local populations Saroma, Notoro, Furen, Yudo and Obuchi.