Buletin Veteriner Udayana
Vol. 14 No. 2 April 2022

Penentuan Kualitas Telur Ayam F1 dan F2 Anakan Biak Selektif Broiler Cobb 500 x Pelung

I Wayan Swarautama Mahardhika (Unknown)
Hendry T.S.S.G. Saragih (Unknown)
Slamet Widiyanto (Unknown)
Budi Setiadi Daryono (Unknown)



Article Info

Publish Date
27 Jan 2022

Abstract

Egg quality can determine the fertility and reproductive efficiency of chickens. Selective breeding of Kambro chickens might have influenced the egg quality. This study aims to determine the influence of a selective breeding program on the egg quality of two Kambro chicken generations, F1 Kambro (F2K)-crossbred and F2 Kambro (F2K)-inbred. Inbreeding coefficient (F) and rate of inbreeding (Fx) of F­2K chickens were calculated. The egg collection record was analyzed based on its productivity, phenotype, weight, index, and exterior egg quality parameters. Exterior egg quality parameters were analyzed with mathematical formulae. Egg productivity in Hen Day Production (HDP) of F1K and F2K chickens for 270-days, respectively, was 24% and 16.5%. The heterosis value of F2K chicken was -31.25% indicating an inbreeding depression in egg productivity. The egg phenotype of F2K was classified into light-brown, cream, brown, and white. The mean egg weight (EW) of F1K and F2K, respectively, was 53.34 ± 2.34-grams and 54.92 ± 9.25-grams, thus were classified as small eggs. The eggshape index of F1K and F2K, respectively, were dominated by sharp eggs and round eggs. Exterior egg quality parameters of F1K and F2K based on GMD could be used as a predictor variable, meanwhile Sp (r = 1, p<0.001) could not be used to describe the disposition of the regression curve. The Fx and F values of F2K, respectively, were 4.925% and 25% close to the tolerance level of inbred-line inbreeding depression. Inbreeding depression was correlated with productivity and egg characteristics depression between F1K and F2K. Parental selection in a selective breeding program must be based on several factors, including inbreeding depression, inbreeding coefficient, inbreeding rate, and egg quality. The implementation of genomic selection may provide a solution to minimalize the effect and fluctuations of Fx and F.

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