2007年3月至2008年8月对象山港海区网箱养殖的岱衢洋、官井洋大黄鱼自交以及正反向杂交子代进行生长特性观察。结果表明:整个实验过程(0~526d),官井洋大黄鱼自交子代(GG)和反交子代(GD)(官井洋♀×岱衢洋♂)大黄鱼较岱衢洋自交子代(DD)和正交子代(DG)(岱衢洋♀×官井洋♂)大黄鱼生长快,到526d实验结束时,GG和GD体重分别达到330.514g和336.694g,而DD和DG则仅为278.975g和243.297g。对其各阶段生长速度分析,发现虽然一龄DD生长较慢,但过冬后DD生长明显加快,体长增长速度超过其他各群子代,体重增长也达到GG和GD增长水平,即有后期增长潜能。对比各群子代肥满度发现,526d时,DD肥满度最低(1.675),GD肥满度(1.779)虽高于DD,但显著小于GG(1.933)。鉴于GD生长速度高于DD,与GG相当,而体型又优于GG,认为GD具有较大的经济养殖和优良品种选育的潜力。拟合各阶段体长体重数据,得出各群体生长曲线公式如下,DD:W=0.0206L^2.9427,R^2=0.9949:GG:W=0.0139L^3.0994,R^2=0.9785;DG:W=0.0229L^2.9136,R^2=0.9905:GD:W=0.0177L^3.0079,R^2=0.9949,拟合度较好,可通过体长估算体重,应用于实际生产。
In this study, the growth characteristics of four Pseudosciaena crocea groups including the selfing of DD ( Daiquyang ♀× Daiquyang ♂ ), the selfing of GG ( Guanjingyang ♀× Guanjingyang ♂ ), their direct cross DG(Daiquyang ♀× Guanjingyang ♂ ), and back-cross GD ( Guanjingyang ♀ × Daiquyang ♂ ) were determined. Results after 526 days of grow-out showed that the final mean weights were higher for the GG (330.514 g)and the GD(336.694 g)than those of the DD(278. 975 g)and the DG(243. 297 g). The 1- year-old DD grew in a lower rate, but after the winter, the growth rate of DD accelerated significantly:the growth rate in length was higher than the other three groups while the weight gain was not significantly different from the GG and the GD. That is, the growth potential of the DD at later stage was high. The order of the fullness on 526th day was DD 〈 DG 〈 GD 〈 GG. A superior cross GD was constructed, which displayed significant heterosis for growth and body shape. It was concluded that the GD had excellent economic and breeding potential. The growth curves ( DD : W=0.0206L^2.9427,R^2=0.9949:GG:W=0.0139L^3.0994,R^2=0.9785;DG:W=0.0229L^2.9136,R^2=0.9905:GD:W=0.0177L^3.0079,R^2=0.9949) fitted according to weight and body length had the high degree. The weight could be estimated by their body length, and this growth curves model could be applied in the production.