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Response to artificial selection and realized heritability estimate for shell height in the Chilean oyster Ostrea chilensis

Published online by Cambridge University Press:  15 April 1991

Jorge E. Toro  and
Gary F. Newkirk
Jorge E. Toro
Affiliation:
Instituto de Biologia Marina, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
Gary F. Newkirk
Affiliation:
Biology Department, Dalhousie University, Halifax, B3H 4J1 Canada
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Abstract

Individual (mass) selection for shell height was carried out in the Chilean oyster, Ostrea chilensis. The selection was based on the shell height of oysters, 30 months old, which came from the natural population of the Quempillen River Estuary (Southern Chile). Divergent selection was applied, three selected groups were chosen to mass spawn (high, mean selected, and low). Offspring from the mean selected and low groups were obtained. A statistically significant difference (p < 0.05) was detected in shell height at 30 months between the offspring of the mean selected and low selected group, suggesting the presence of additive gene effects for growth rate. The realized heritability estimate (h2 = 0.34 ± 0.12) for a decrease in the shell height, indicates that selective breeding on this trait can be effective in Ostrea chilensis.

Keywords

SelectionheritabilityOstrea chilensisgrowthSélectionhéréditéOstrea chilensiscroissance
Type
Research Article
Information
Aquatic Living Resources , Volume 4 , Issue 2 , April 1991 , pp. 101 - 108
Copyright
© IFREMER-Gauthier-Villars, 1991

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