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| Growth Traits of F1 Crossed between Wild and Selective Breeding Large Yellow Croaker Larimichthy s crocea |
| ZHENG Wei-qiang,HUANG Wei-qing,HAN Kun-huang,LIU Zhao-kun,ZHANG Yi,LIU Xing-biao,KE Qiao-zhen,CHEN Jia |
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Abstract The egg diameter ,oil globule diameter ,total length ,body length and body weight 2-10 month old were compared among F1 crossed between wild and selective breeding large yellow croaker Larimich‐thys crocea including first filial generation (F1 ) (♀) × wild (♂) ,wild (♀) × first filial generation (F1 ) (♂),wild(♀)×wild(♂)andfirstfilialgeneration(F1)(♀)×firstfilialgeneration(F1)(♂).Itwas found that the first filial generation (F1 ) (♀ ) × wild large yellow croaker (♂) had the eggs with the maximal diameter ,significant difference from that in wild (♀ ) × wild (♂) (P< 0 .05) .No significant difference in the oil globule diameter was observed in the four groups . There was the best growth (14 .48% ) in body weight in the 9‐month‐old F1 hybrid of their wild parents ,and the best growth heterosis (25 .68% ) in the group of wild (♀) × first filial generation (F1 ) (♂) .The specific growth rate in total length and body weight were found to be 1 .92% /d and 5 .60% /d in wild (♀)× first filial generation (F1 ) (♂) ,respectively .There was 1 .99 % /d of specific growth rate in body length in first filial generation (F1 ) (♀)× wild (♂) ,showing the best growth among these four groups .The relationship between fit‐ting body length (L) and body weight (W ) was as the following :m=0 .0277L2 .8045 (r2 =0 .9980) in first fil‐ialgeneration(F1)(♀) × wild(♂);m=0.0210L2.9287(r2 =0.9993)inwild(♀)×firstfilialgeneration (F1) (♂);m= 0 .0236 L2.8592(r2 =0 .9916)in wild (♀)× wild (♂);and m=0 .0228L2.8946(r2 =0 .9984)in first filial generation (F1 ) (♀ ) × first filial generation (F1 ) (♂) .The findings indicate that hybrid be‐tween wild population and cultured population leads to improvement of economic characters of filial genera‐tion of large yellow croaker .
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Received: 25 November 2014
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