竹丝鸡屠宰体重和肤色指标相关性分析

Correlation analysis of slaughter weight and skin color of Silkies

为了研究竹丝鸡屠宰体重与肤色性状指标间的相关性,试验选取第8世代1日龄N611品系竹丝鸡337只(公鸡165只、母鸡172只)为研究对象,测定63日龄公鸡和70日龄母鸡的屠宰体重,同时利用色差仪测定公母鸡肩部、背部、翅下、尾椎、胸部和颈部肤色L^(*)、a^(*)、b^(*)值,对上述指标及屠宰体重间的相关性进行了研究。结果表明:竹丝鸡母鸡肩部、翅下、尾椎、胸部、颈部肤色L^(*)值均显著或极显著小于公鸡(P<0.05或P<0.01),提示母鸡总体肤色比公鸡黑;竹丝鸡胸部肤色L^(*)值与屠宰体重呈显著正相关(P<0.05),相关系数为0.140,各部位肤色L^(*)值间呈极显著正相关(P<0.01);背部肤色a^(*)值与屠宰体重呈显著负相关(P<0.05),相关系数为-0.119;各部位肤色b^(*)值与屠宰体重相关性不显著(P>0.05)。说明在竹丝鸡育种过程中可以将胸部肤色L^(*)值作为辅助选育指标以加快育种进展。

In order to study the correlation between slaughter weight and skin color traits of Silkies, 337 1-day-old 8th-generation N611 Silkies were selected as the research subjects, including 165 male Silkies and 172 female Silkies. The slaughter weight of 63-day-old male Silkies and 70-day-old female Silkies was measured, and the skin color L^(*), a^(*), b^(*) values of the shoulder, back, underwing, tail vertebra, chest and neck were measured by colorimeter. The correlation between the above indicators and slaughter weight was studied. The results showed that the skin color L^(*) values of the shoulder, underwing, tail vertebra, chest, and neck of female Silkies were significantly or extremely significantly lower than those of male silkies(P<0.05 or P<0.01), indicating that the overall skin color of females was darker than that of males. The skin color L^(*) value of the chest of Silkies was significantly positively correlated with the slaughter weight(P<0.05), with a correlation coefficient of 0.140. The skin color L^(*) values of each part were significantly positively correlated(P<0.01). The a^(*) value of the back skin color was significantly negatively correlated with the slaughter weight(P<0.05), with a correlation coefficient of-0.119. The b^(*) value of each part of the skin color was not significantly correlated with the slaughter weight(P>0.05). The results indicated that the skin color L^(*) value of the chest could be used as an auxiliary breeding indicator to accelerate breeding progress in the breeding process of Silkies.