一定体重下肉鸡胴体特性及杂交效应研究

Carcass Characteristics of a Common Body Weight in Meat type Chickens and Their Heterotic Effects

在一定生理学年龄下测定并比较了白羽略阳鸡（ＷＬ）与ＡｒｂｏｒＡｃｒｅｓ（ＡＡ）的胴体特性及杂交（Ｆ１）效应。结果表明，在１８００ｇ体重时，ＷＬ的屠宰日龄为１２６ｄ，约是ＡＡ（４１ｄ）的３倍；腿肉产量较高，胸肉较低；腹脂量（８．８ｇ）明显低于ＡＡ（２８．８ｇ），肝、脾、胰及消化道的重量也较低，但胫骨和股骨较重、较长、直径较大。其Ｆ１腹脂量、胫骨长和重及一些内脏器官重等性状具有较大的正杂交优势，达一定体重的年龄等表现出较大的负杂交优势。

The carcass characteristics and the F 1 of White Lueyang (WL) and Arbor Acres (AA) were determined and analysized under certain physiological age.The results showed that at the weight of 1800 g,the slaughtering age of WL was 126 d,which was 3 times of AA(41d). WL has a higher yield of deboned leg meat but lower of breast meat and much lower of abdominal fat (8.8 g) than that of AA (28.8 g);and also has lower weight of liver,spleen,pancreas and digestive tract than AA does respectively,but both tibia and femur have greater in weight and diameter,longer in length compared with those of AA.F 1 has greater postive heterosis in abdominal fat,weight,tibia size and some organ weight,and great negetive heterosis at weights in certain ages,and no meat yield heterosis.