高产蛋鸭配套系的选育

从福建龙岩蛋鸭原种场选择7个蛋鸭品种（品系）S，、S2、S3、J、P、F、K，组建5组不同的三系杂交配套组合：Jδ×（Fδ×S1δ）、Pδ×（Fδ×S3辛）、Fδ×（Pδ×S2δ）、Fδ×（KδXS2δ）、Fδ×（PδXS3δ）．5个配套系商品代经500日饲养试验测定，筛选出生产性能最优的2个配套系为青壳蛋系Jδ×（FδXS1δ）、白壳蛋系Fδ×（PδχS3δ）．青壳蛋系的产蛋率达50％时，平均日龄（118±2．45）d，平均体重（1595．6±22．5）g，500日龄的产蛋数、总蛋重、蛋重、料蛋比分别为（330．6±4．29）枚、（22．694-0．21）kg、（72．50±0．20）g、（2．864±0．03）：1；自壳蛋系的产蛋率达50％时，平均日龄（114．7±1．25）d，平均体重（1526．6±12．31）g，500日龄的产蛋数、总蛋重、蛋重、料蛋比分别为（335．29土1．8）枚、（23．224±0．17）kg、（71．364±O．05）g、（2．77±0．01）：1．可见，2个配套系的生产性能均达国内领先水平，具有推广应用价值．

High,yield commercial lines with crossbreeding of laying duck species

Seven laying duck species or strains were selected from laying duck species population resources in Longyan, Fujian Province to develop muhiplicative strain with crossbreeding. 5 multiplicative strains of three line hybrid were established. They were A strain, J male x （ F male x S1 female） ; B strain, P male x （ F male x S3 female） ; C strain, F male x （ P male x S2 female） ; D strain, F malex （K male xS2 female） and E strain, F male x （P male xS3 female）. Data were recorded from one day old to 500 day old. The results showed that A strain （green-shell egg line） and E strain （white shell egg line） had better production per iormance than others. When laying rate of A strain （green shell egg line） came up to 50%, the average age was （118 ±2.45） d and average body weight was （ 1595.6±22.5） g. In the 500 days of age, （330.6 ±4.29） eggs were obtained, total weight of eggs was （22.69 20.21） kg, the weight of eggs was （72.50± 20.20） g and feed efficiency was （ 1：2.86± 20.03）. When laying rate of E strain （white shell egg line） came up to 50%, the average age was （114.7 ± 1.25） d and average body weight was （1526.6 ± 12.31 ） g. In the 500 days of age, （335.29 ± 1.8） eggs are obtained, total weight of eggs was （23.22 ± 0.17 ） kg, the weight of eggs was （71.36 ±0.05） g and feed efficiency is （ 1：2.77± 20.01 ）. Both A strain and E strain could be disseminated because of leading in the production performance of other laying duck species or strains.