摘要
为了了解鲤杂交F1不同组合、不同阶段生长性状的变化情况,研究以建鲤、黄河鲤和黑龙江野鲤3个鲤品种双列杂交F1为试验材料,通过组合、组合内性别间、性别、不同时期体重、体增重以及协方差分量的分析,来确定完全双列杂交F1生长性状的变化特点,以及在此过程中起重要作用的影响因素。结果表明:不同时期各个组合体重不同,不同时期组合内性别间体重差异不同;不同时期不同性别间体重差异不同;不同协方差分量,同一组合PIT标记17个月时的体重的最小二乘估计值不同,同一个协方差分量,9个组合中极值估计值出现的组合也不同;除PIT标记17个月后的体厚作为协方差分量外,性别之间体重没有差异,其余分量均是雌鱼体重显著高于雄鱼体重。这些说明选取合适的协方差分量对组合的选择和育种的结果有重要影响。
Jian carp （Cyprinus carpio var. jian） examined and approved in 1990, was the first approved aquatic specie using integrated genetic breeding technology. Jian carp is a good stock of cultivated fish species which has good growth traits and good disease-resisitant performance. Although Jian carp has been disseminated wildly, there still has a great need to enhance fine growth performance through continuous selection and genetic improvement. Huanghe carp is a remarkable local specie of common carp in northern China, which possesses good meat quality, strong cold resistance and high efficiency of food conversion. Heilongjiang carp has high frigid resistance, good quality and growth trait. Spe- cific hybridization is an effective pathway for growth improvement in common carp breeding programs. In most cases, obvious heterosis may be observed in hybrids in growth rate, compared to their parents, suggesting a potential resolution to current problems. Generally, the growth pattern of hybrids and their parental species usually reflect that the hybrids were viable and whether superior performances over the mid parent values occurred or not. Covariance component de- fined for estimated breeding value play a central role in selection of best model for carp improvement by cross breeding and family selection. To explore the changes of growth traits in different F1 combination and different growth stage, the article illustrated the growth variation of 3＊3 full diallel cross F1 based on the Jian carp, Huanghe carp and Heilongjiang carp by combination analysis, gender in combination analysis, gender analysis, bodyweight and weight gain in different stage analysis. At this time, the factors which may play an important role in the growth stages were also focused on by covariance analysis. The results showed that significant differences of body weight in different growth stage were found; both within and without considering the combination effect, different gender in the same stage had different growth performance. After 5 month PIT tagging, Jj purebred group had better bodyweight compared to other groups. But, the higher body weight and better body weight gain, which were due to cross, were got and the heterosis were also found. At the same time, 300 g gain for body weight after 17 months by PIT tagging between female and male was found. What- ever for first stage and for the second stage, female had bigger body weight gain than male had. LSmeans of body weight for 17 months＇ PIT tagged fish in one combination based on the different covariance parameters, while estimated extreme value was observed in different combination for the specialized covariance component. Besides these, female had the higher body weight compared to the male except for the thickness of PIT tagged fish for 17 months as covari- ance parameter. These illustrated that covariance selection play a key role of in combination selection and breeding program. Further more, thickness of PIT tagged fish for 17 months as covariance component may produce the difference to separate female from the mixed group. Besides these, heterosis researched for specified combination was developed for special stage; sex selection in early stage can improve the economic effects; female had an advantage in body weight gain comparing male, especially in the crossbred combination. So, the economic traits of breeding program require con- sidering the combination, growth period, gender effects and their interactions.
出处
《水生生物学报》
CAS
CSCD
北大核心
2012年第4期618-625,共8页
Acta Hydrobiologica Sinica
基金
现代农业产业技术体系建设专项资金项目(CARS-46-06)
国家"十二五"科技支撑计划项目专题(No.2012BAD26B02)
中央级公益性科研院所基本科研业务费专项资金(2009JBFB01)
江苏省自然基金(No.BK2010164)资助
作者简介
苏胜彦(1982-),男,山西榆次人,助研,博士,研究方向为分子数量遗传学。Tel:86-510-85550051,E-mail:susy@ffrc.cn;通讯作者:董在杰(1967-),男,研究员,博士,研究方向为鱼类遗传育种。Tel:86-510-85558831,E-mail:dongzj@ffrc.cn;通讯作者:徐跑(1963-),男,研究员,博士,研究方向:鱼类遗传育种。Tel:86-510-85550702,E-mail:xup@ffrc.cn
