Abstract:
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.