大菱鲆不同家系生长性能的比较

Comparison of the growing performance of different families of turbot (Scophthalmus maximus L.)

为培育优良的大菱鲆养殖新品种,收集了4个不同地理群体的大菱鲆作亲本,根据巢式设计,采用人工受精技术,在群体间和群体内构建了全同胞和半同胞家系,对其不同生长时期(生长阶段)全同胞家系的生长性能进行了比较。综合不同生长时期家系的体质量差异分析和不同生长阶段家系的生长速度分析,结果表明:来自英国和法国的群体间和群体内家系的生长性能比丹麦和挪威群体的群体间和群体内家系的生长性能更为优良,部分英国群体、法国群体与丹麦群体、挪威群体的群体间家系也存在着较为优良的生长性能;不同生长时期(生长阶段)家系生长性能的排序存在不一致性,生长时期(生长阶段)越长,相邻两个生长时期(生长阶段)家系生长性能的相关性越高,家系排序的一致性越好;根据不同生长时期(生长阶段)家系生长性能的相关分析,在通过选择育种对大菱鲆进行遗传改良时,进行个体选择的时期应不低于9月龄。

To provide basic data for the genetic breeding program of Turbot, Scophthalmus maximus L., four imported turbot stocks were collected to construct full-sib and half-sib families among stocks as well as within stocks by nest mating design and in vitro fertilization. Comparison of the growing performance （body weight and growth rate） among 32 full-sib families constructed had been carried out on different growth days and growth phases. The results demonstrated that the growing performance of among stocks and within stock families from England and France were better than those of among stocks and within stocks families from Denmark and Norway. In addition, the growing performance of a few families from England, France, and Denmark, Norway stocks were comparatively good according to analysis of body weight of families on different growth days and growth rate of families on different growth phases. The data sorting of growing performance on different growth days and growth phases ranked different in most families, and the growth days and growth phases of families were longer, the correlation indexes of growing performance of families on border upon growth days or growth phases were higher, at the same time, the coherence of families ranking was better. Through the correlation analysis of growing performance of families on different growth days and growth phases, the times of individual selection should be no less than 9 months.