Direct and indirect contributions of internal and external quality traits on egg weight of Shika Brown layer using Path Coefficient Analysis

Authors : Emmanuel Abayomi ROTIMI, Babba Hussaina USMAN, Dauda GAMBO

Pages : 38-45

Doi:10.37908/mkutbd.1122288

View : 9 | Download : 3

Publication Date : 2023-04-07

Article Type : Research Paper

Abstract :Path analysis procedure is a statistical procedure that can be applied to evaluate direct and indirect contributions of independent variables to the dependent variables for better understanding of the relationships between egg quality traits. One hundred and twenty insert ignore into journalissuearticles values(120); eggs, collected from Shika Brown layers, were used to evaluate the direct and indirect effects of internal and external egg quality parameters on egg weight of Shika Brown layers using Path analysis procedure. Data obtained on individual egg include the following; egg weight insert ignore into journalissuearticles values(EWT);, egg length insert ignore into journalissuearticles values(ELT);, egg width insert ignore into journalissuearticles values(EWD);, shell thickness insert ignore into journalissuearticles values(STK);, shell weight insert ignore into journalissuearticles values(SWT);, albumen weight insert ignore into journalissuearticles values(AWT); and yolk weight insert ignore into journalissuearticles values(YWT);. Correlation coefficient results show that EWT had a positively significant correlation insert ignore into journalissuearticles values(P<0.05); with ELT insert ignore into journalissuearticles values(0.715);, EWD insert ignore into journalissuearticles values(0.758);, SWT insert ignore into journalissuearticles values(0.460); and AWT insert ignore into journalissuearticles values(0.785);. ELT had the greatest direct effect insert ignore into journalissuearticles values(0.360; P<0.05); on EWT followed by EWD insert ignore into journalissuearticles values(0.345; P<0.05); while the least of the direct effects on EWT insert ignore into journalissuearticles values(0.012; P<0.05); was from STK. However, the highest total indirect effect insert ignore into journalissuearticles values(0.487); on EGW was realised largely via EWD. Therefore, EWT of Shika Brown layer strain had a high positive relationship with ELT, EWD and AWT. The path coefficient analysis revealed that ELT, along with EWD contributed highest direct effect on the EWT. This information could be used in selection programme for the improvement of EWT of Shika Brown layer chickens.
Keywords : Korelasyon katsayısı, Doğrudan etki, Dolaylı etki, Yol analizi