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| Realized Heritability and Growth of Offsprings of Wild Large Yellow Croaker Pseudosciaena crocea |
| HUANG Weiqing,HAN Kunhuang,CHEN Shixi,ZHANG Yi,ZHOU Shaofeng,ZHOU Ruifa,LUO Fen |
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Abstract The growth performance and realized heritability were compared in offsprings of wild and sea cage‐reared large yellow croaker Pseudosciaena crocea . The results showed that the wild large yellow croaker had lower fertilization rates than the sea cage‐reared did ,but significant higher hatching rates than the sea cage‐reared did (P< 0 .05) .There were higher absolute growth rates in body weight [(0 .02 ± 0 .004) g/d — (0 .26 ± 0 .081) g/d] ,absolute grow th rate in body length [(0 .02 ± 0 .008) cm/d — (0 .11 ± 0 .009) cm/d ,daily length and weight increment (0 .007 ± 0 .005 — 0 .153 ± 0 .015) ,and condition fac‐tor(1 .66 ± 0 .18 — 1 .97 ± 0 .29) in the wild large yellow croaker than those in the sea cage‐reared .The re‐alized heritability was 0 .027 — 0 .185 in body weight and 0 .001—0 .040 in body length .The findings indi‐cate that selective breeding program for wild population is very promising ,but family selection and within‐family selection should be combined due to the relatively low realized heritability .
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Received: 25 March 2016
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