摘要:
运用现代遗传育种理论和方法,育成配套品系的父、母系。父系以近交法建系,近交系数达38—39%,母系以家系闭锁世代选择法建系。父、母系的母鸭500日龄平均产蛋分别266—276和285—296个,配套系统配合力测定,最佳配套组合500日龄平均产蛋329—344个,比父母系分别提高19—24%和15—16%。建立了繁育体系,1988—1991年间配套杂交制种87万只。大群生产500日龄平均产蛋305—310个。在配套系选育的同时,研究了用鸭胚组织培养液酶活性进行早期选种;主要经济性状遗传参数的估测;蛋鸭青壳蛋遗传规律;产蛋鸭的能量和蛋白质的需要。
Abstract:
With application of modern genetic theory and breeding technique, the paternal and maternal lines used for crossing have been established. The paternal line was developed from inbreeding, its inbreeding coefficient was 38-39%, While the maternal line was selected from generation among closed flock. The amount of egg laid by duck with age in 500days was as much as 266-276 in paternal line and 285-296 in maternal line. By mating between two lines and determining their combining ability of all combinations, it showed that the egg amount of optimum combination duck aged in 500 days was maximum to 329-344 which was 19 -16% above its parental lines. After establishment of proliferative system, there were 870, 000 ducks bred during 1988-1991 and the egg amount laid by 500 days age duck among these large scale was averaged to 305-310. In addition to breeding, It has been approached that: activity of enzyme extracted from duck embryo histological medium as standard for early line selection; main hereditary character data estimated as ecomonic index; the genetic feature for indio-shell egg heredity in duck breed; and the energy and protein necessity for these egg-laying ducks.
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