建昌鸭白羽系三系配套组合的生产性能研究

本试验采用了三元杂交配套模式（即M♂×J♀→MJ♀×F♂→GMJ），以亲本M、J为对照，测定了单杂交母本MJ的繁殖性能，研究杂交鸭GMJ、GM、GJ和亲本G、M、J六个组合在放牧补饲和合饲方式下的肉用性能．结果表明：MJ40周产蛋量为203．7个，比J（147．2个）提高56．5个，MJ为全年产蛋，无季节性．舍饲7周龄，GMJ重2726．5g．比J提高全净膛重34．5％，胸肌63．9％，腿肌23．0％．杂交显著提高了建白羽系的生长速度和产肉量，改变了J胸肌薄弱的缺点．

STUDY ON THE PRODUCTION PERFORMANCE OF THREE-WAY CROSS USING THE WHITE PLUMAGE LINE OF JIANCHANG DUCK

In this paper the model of three-way crossing, i. e., M♂×J♀→MJ♀×G♂→GMJ, was studied to improve the reproductive performance, growth rate andmeat yield of a white plumage line of Jianchang Ducks (J). The carcass analysiswas carried out for ducks at age of 7-8 weeds. The results showed as follos: Theegg yield achieved 203. 7 eggs for MJ in 40 weeks, 56. 6 eggs higher than that ofJ (147. 2eggs). No significant laying season was observed in MJ in part I. Inhousing, the mean liveweight of GMJ in the 7th week was 2726. 5g. The percentageof eviscerated weight and breast muscle yield were increased by 47. 9 and 89. 3respectively, compared with those of J. On creep-feeding pasturing, the mean live-weight of GMJ in 7-8 weeks of agewas 2346. 9-2614. 0g. 39. 0 or 32. 6 percent higlerthan those of J. The Ferceutage of eyiseerated weight, breast muscle yield andleg muscle yield for GMJ were 34. 5. 63. 9 and 23. 0 respectively higher than thoseof J. In was concluded as follows: The egg yield and egg weight of J could beincreased significantly crossed witg big meat-type dam line. The rate of growthand meat productivity (especially for breast muscle) could be marketly improvedby the three-way cross.