Biochemical polymorphism in the pacific oyster-I. Variants in myogen and esterases.

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  • マガキの生化学的多型-I
  • マガキの生化学的多型-1-ミオゲンとエステラーゼの変異型〔英文〕
  • マガキ ノ セイカガクテキ タケイ 1 ミオゲン ト エステラーゼ ノ ヘンイ
  • Variants in Myogen and Esterases

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Biochemical polymorphism is useful in breeding science for identifying wild populations as germplasm resources and for selective breeding when adaptive value, heterosis, or association with economic traits are detected. In a series of such studies, genetic variations in myogen from adductor muscle and esterases from digestive diverticula of the Pacific oyster, Crassostrea gigas, sampled from Iwte Prefecture and Miyagi Prefecture, were examined and compared with the results obtained by other authors on populations from Puget Sound, U.S.A., Brittany, France and Conway, Great Britain.<br> Described were three phenotypes in the myogen locus and ten phenotypes comprising four sets of bands in the esterase S zone locus. Poor reproducibility of the zymograms, however, made an accurate description of variations in the esterase F zone difficult. The occurrence of the two bands a and b in each set of the S zone suggested a separate locus, Which modifies the mobilities of bands in the S zone. The locus appeared to be associated with that of the esterase S zone. No association was observed between the two loci of myogen and esterase S zone.

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