Validating Egg Component Proportions in Quail Receiving Methionine Supplementation
Adi Ratriyanto*, Septian Nurcahyo, Sigit Prastowo, Nuzul Widyas
Department of Animal Science, Faculty of Agriculture, Sebelas Maret University,
Jl. Ir. Sutami 36A, Surakarta, Indonesia
*ratriyanto[at]staff.uns.ac.id
Abstract
Essential amino acid methionine is a methyl donor which involved in protein and fat metabolism; thus, it holds an important role in the synthesis of egg yolk and albumen precursors. This research aimed to observe the effect of methionine on the weight of egg and its components and to prove if egg weight could be used to predict the yolk and albumen weight. In total, 225 quails were allotted into three treatments and five replicates each with fifteen individuals. The treatments were basal diet (T0), basal diet with 0.06% (T1) and 0.12% methionine (T2). ANOVA was conducted to test the effect of treatments. Simple linear regressions were built to predict yolk and albumen weight based on egg weight. Cross validation procedure was applied to test the predictability of the models. Quails in T2 and T1 produced heavier eggs (9.29±0.52 and 9.04±0.76 g) compared to T0 (8.77±0.55 g). Albumen weight follow similar trends which were 5.37±0.38, 5.53±0.54, 5.75±0.44 g for T2, T1 and T0, respectively. Yolk weight slightly differ where T1 had higher weight (2.64±0.30 g) followed by T2 (2.62±0.27 g) and T0 (2.50±0.32 g). Pearson-s correlation between egg and yolk weight were between 61-71% whereas for egg and albumen were between 69-87%. Simple linear regression predicting yolk and albumen weight from egg weight had accuracies between 92.7-94.3% and 94.3-96.2%, respectively. Methionine supplementation had significant effect on egg and egg components weights. Linear regression can be utilized to predict yolk and albumen weight based on egg weight with high accuracy.
Keywords: Quail; Egg; Yolk,Albumen; Model prediction
Topic: Feeds, feeding, and animal nutrition