Canonical Correlation Analysis of Growth and Carcass Traits of Xuanhe Pigs
To reveal the inherent relationship between growth and carcass traits in Xuanhe pigs,a total of 122 Xuanhe piglets with body weight of about 30 kg were selected to measure the growth traits under the same feeding and management conditions,and were slaughtered to measure carcass traits when their body weights were about 100 kg.On the basis of performance test,Pearson correlation and canonical correlation analysis were carried out between 7 growth traits and 6 carcass traits.The results showed that the Pearson correlation of most growth traits were significant(P＜0.05 or P＜0.01),and correlation coefficient was the highest for feed conversion rate and average daily gain(r=-0.5851,P＜0.01).Lean meat percentage was significantly positively correlated with loin eye area and percentage of ham(P＜0.01).The correlation was found to be significantly positive for average daily gain,body length with carcass length,for chest circumference,live backfat thickness with average backfat thickness,and for live weight at slaughter with dressing percentage(P＜0.05 or P＜0.01).However,the correlation was found to be significantly negative for feed conversion rate with average backfat thickness and carcass length,for body length and body height with lean meat percentage,and for chest circumference and live backfat thickness with percentage of ham(P＜0.05 or P＜0.01).The first and second canonical correlation coefficients were 0.6777(P＜0.001)and 0.4797(P＜0.001),respectively between growth and carcass traits,accounting for 79.79%of the total correlation information.The canonical correlation between growth and carcass traits was mainly caused by that of feed conversion rate with dressing percentage and average backfat thickness in Xuanhe pigs.In conclusion,the selection of feed conversion rate would be helpful to increase growth rate,but it would decrease dressing percentage,and increase average backfat thickness in breeding practice of Xuanhe pigs.
国家科技期刊平台
NSTL
万方数据
维普
