Determination of the Optimal Dietary Amino Acid Ratio Based on Egg Quality for Japanese Quail Breeder

Abstract

The objective of this study was to determine the ideal amino acid ratio for Japanese quail based on egg quality. In total, 120 Japanese quail were used. A completely randomized design was used with 12 treatments and 10 replicates per treatment. The treatments consisted of a balanced protein (BP) and the subsequent 11 diets were obtained by the 40% deletion of the BP a specific test for Lys, Met + Cys, Thr, Trp, Arg, Gly + Ser, Val, Ile, Leu, His, and Phr + Tyr. The trial lasted for 25 days. At the end of the trial, egg weight (EW), albumen height, albumen diameter, albumen index, yolk height, yolk diameter, yolk index, Haugh unit, eggshell weight (ESW), and eggshell percentage were measured. The ideal ratio was calculated when a statistical difference was detected using Dunnett’s test. Only the EW and ESW variables differed from those of BP. The ideal amino acid ratios considering Lys as 100 for EW and ESW were Met + Cys 82 and 83, Thr 60 and 68, Trp 18 and 21, Arg 109 and 112, Gly + Ser 99 and 102, Val 77 and 87, Ile 61 and 67, Leu 155 and 141, His 34 and 37, Phe + Try 134 and 133, respectively.

Some productive and reproductive performance, eggshell quality, serum metabolites and immune responses due to L‐threonine supplementation in Japanese quail breeders' diet

“…The dietary threonine concentration reported for laying quails are estimated higher than those determined in this study for Japanese quail breeders. In agreement with our result in the current study, dThr requirement for Japanese quail breeders was estimated at 0.59% (Carvalho et al, 2022, 2023), which was 14% and 5% lower than reported by Ramalho de Lima et al (2013) and Sarcinelli et al (2020), respectively. Carvalho et al (2022) concluded that Japanese quail breeders have lower dietary efficiency than commercial birds.…”

“…Breeder birds need amino acids for maintenance, tissue growth and fertile EP (Carvalho et al, 2022). Therefore, maternal nutrition can modify the composition and characteristics of eggs and consequently affect embryonic development (Carvalho et al, 2023; Li et al, 2019). Among indispensable amino acids, threonine is often the third limiting amino acid for poultry fed corn‐soybean meal diets (Hossaninejad et al, 2021; Jiang et al, 2019) and plays a vital role in the gastrointestinal tract, immunity, protein synthesis, FE and reproductive system (Mehri et al, 2021).…”

“…In laying hens, dietary supplementation with L-threonine enhances the egg production (EP), egg weight (EW), feed conversion ratio and immunity (Azzam et al, 2014(Azzam et al, , 2017Martínez-Amezcua et al, 1999;Wareth & Esmail, 2014). There is very limited and inconsistent information in the literature on quail breeders (Carvalho et al, 2022(Carvalho et al, , 2023, that there are no specific and coherent tables for their nutrient requirements. Therefore, at the present breeder diets are formulated based on the laying quail recommendations (NRC, 1994;Rostagno et al, 2011).…”

Animal Nutrition and Productions

“…The second article by Carvalho L.C. et al [17] highlights a very interesting topic, and the authors provide a substantial contribution to the determination of the optimal amino acid ratio for Japanese quail based on the quality of egg production. A completely randomized design was used, with 120 Japanese quails, 12 treatments and 10 replicates per treatment.…”