北京鸭胸肌肌内脂肪含量与屠体性能指标的关系

The Correlation between Breast Intramuscular Fat and Body Composition in Peking Duck

对Z型北京鸭3个品系的肌内脂肪含量与屠体性能的关系进行了分析。结果表明:Z2系母鸭腿肌重、皮脂重与肌内脂肪含量的相关系数分别为0.3738、0.4349(P<0.01),均为极显著中强正相关,而皮脂率为显著弱正相关。Z4系公母鸭肌内脂肪含量与胸肌重(率)、腿肌重(率)、腹脂重(率)、皮脂重(率)均相关较弱,表现为相关不显著。杂交系公鸭皮脂重与肌内脂肪含量相关系数为0.3(P<0.05),表现为显著弱正相关;母鸭胸肌重、腿肌重与肌内脂肪含量均表现为显著弱正相关。综合本试验可得出:由于各品系间及品系内肌内脂肪含量与屠体各指标相关程度的不同,在瘦肉型北京鸭选育过程中,要针对不同品系公母单独制定育种目标,以加快北京鸭的选育速度。

The correlation between intramuscular fat （IMF） and body composition in Peking duck of three lines were analyzed in this paper. The results showed the correlative indexes between IMF and leg weight, sebum weight were 0.3738 and 0.43495 （ P 〈 0.01 ）, respectively, and showed significantly middle or high correlation. However, the correlative indexes between IMF and sebum rate was lower significant. The correlation between IMF and breast muscular weight （rate）, leg muscular weight （rate）, abdomen fat weight （rate）, sebum weight （rate） of male and female Z4 duck were all showed lower significant. The correlative index between IMF and sebum rate was 0.3 （P 〈 0.05） in male hybrid duck and showed low positive significant; the correlative index between IMF and breast muscular weight, leg muscular weight were all showed low positive significant. We can draw a conclusion that the correlative degree of IMF and different indexes were different among different lines, thus we must establish different breeding projects according to different lines in breeding and accelerate the breeding rate of duck.