期刊
JOURNAL OF SHELLFISH RESEARCH
卷 31, 期 4, 页码 1145-1149出版社
NATL SHELLFISHERIES ASSOC
DOI: 10.2983/035.031.0425
关键词
Placopecten magellanicus; crossbreeding; combining ability; heterosis; growth; survival
Selective breeding and crossbreeding are seen widely in genetic improvement of crops as well as molluscs. In this study, we constructed complete 4X4 diallel crosses using broodstock from 4 geographical subpopulations of sea scallops along the Atlantic coast of Canada, and heterosis and combining abilities in growth and survival rates at larval and adult grow-out stages were analyzed. The results indicated that variable heterosis in growth and survival exist in larval and adult stages. In many cases, the fitness traits increased with general combining abilities, especially-at the larval stage, but in some cases, groups with high growth or survival rate but low general combining abilities were also observed. Reciprocal effects and maternal reciprocal effects were observed in growth and survival at the larval stage and also in adult growth. Two hybrid strains with superior growth and survival traits over purebred and other hybrid groups were selected that can be used in future culture practice.
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