Estimates of Heritability of Larval and Early Juvenile Growth Traits in Red Drum (Sciaenops ocellatus) |
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Authors: | Liang Ma Delbert M Gatlin III John R Gold |
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Institution: | 1. Department of Wildlife and Fisheries Sciences , TAMU 2258, Texas A&2. M University , College Station, Texas, 77843-2258 |
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Abstract: | ABSTRACT Eighteen to 29 families of red drum were generated via spontaneous spawning of multiple sets of three dams?×?two sires. In 2002, offspring from spawning events were grown in separate larval ponds to a mean TL of 30.4 mm. In 2003, offspring from spawning events were individually passive integrated transponder (PIT)-tagged and grown in “common-garden” tanks from 121.9 to 166.6 mm. Offspring in both experiments were assigned to parents based on genotypes at four microsatellite loci. Heritability estimates were 0.24?±?0.06 (larval TL) and 0.48?±?0.16 (juvenile-specific growth rate in length) and indicate a significant genetic component for both traits. |
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Keywords: | Heritability growth rate red drum microsatellites |
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