珍禽贵妃鸡体尺性状与屠宰性能的相关分析

Correlation between body size and slaughter performance of Princess Chicken

【目标】探析贵妃鸡、体尺性状与屠宰性能的相关性,为今后科学系统地进行珍禽资源优势挖掘及良种选育提供理论依据。【方法】对12周龄贵妃鸡进行活重、体尺性状和屠宰性能指标测定,采用SPSS19.0统计软件对其屠宰性能和体尺性状进行相关分析,并采用逐步回归法构建主要屠宰性能的回归方程。【结果】12周龄贵妃公鸡的龙骨长、胫围和胫长显著高于母鸡(P<0.05,下同),活重、屠体重、半净膛重、全净膛重、胸肌重、腿肌重、翅膀重和脚重极显著高于母鸡(P<0.01,下同),腹脂重显著低于母鸡,腹脂率极显著低于母鸡,其余指标则差异不显著(P>0.05)。在贵妃鸡体尺性状与屠宰性能的相关性方面,体斜长与活重、屠体重、半净膛重、胸肌重和腿肌重呈显著正相关,与全净膛重呈极显著正相关,与腹脂重呈极显著负相关;龙骨长与活重、屠体重、半净膛重、全净膛重、胸肌重和腿肌重呈极显著正相关,与腹脂重呈极显著负相关;胫围与活重、屠体重、半净膛重、全净膛重和腿肌重呈极显著正相关,与胸肌重呈极显著负相关,与腹脂重呈显著负相关。【结论】贵妃鸡的屠宰性能与大多数体尺性状存在显著或极显著相关性,将对屠宰性能影响显著的相关体尺性状代入回归方程,即可预测出相应的屠宰性能。

[Objective]Correlation between body size and slaughter performnce of Princess Chicken was studied to provide theoretical references for breeding superior varieties.[Method] 12-week-old Princess Chicken was used to measure its live weight,body size and slaughter performance indexes and then correlation and regression analysis were conducted using SPSS 19.0.[Result]The results showed that keel length,shinbone girth and shank length of male 12-week-old Princess Chicken were significantly higher than those of female chickens （P＜0.05,the same hereinafter）.The live weight,carcass weight,semi-eviscerated weight,eviscerated weight,chest muscle weight,leg muscle weight,wings weight and feet weight of male were extremely significantly higher than those of female chickens （P＜0.01,the same hereinafter）.Abdominal fat weight of male was significantly lower than that of female chickens,and abdominal fat percentage of male was extremely significantly lower than that of female chickens,but there was no significant difference among other indicators （P ＞0.05）.There were significantly positive correlations among keel length,live weight,carcass weight,semi-eviscerated weight,chest muscle weight and the leg muscle weight.Keel length was significantly positively related to eviscerated weight and negatively related to abdominal fat.There were extremely significantly positive correlations among shinbone girth,live weight,carcass weight,semi-eviscerated weight,eviscerated weight and leg muscle weight.Shinbone girth was extremely negatively related to chest muscle weight and negatively related to abdominal fat.[Conclusion]As slaughter performance has significant or extremely significant relation with body size indicators,slaughter perfomance can be predicted by an regression equation of relevant body size indicators.