Egg Quality Traits in Wg, Gg and Gl Japanese Quail Populations

Abstract

The aim of the study was to evaluate egg quality traits in three heavy Japanese quail populations created and reared in the Poultry Breeding Unit of the Trakia University – Bulgaria, marked as WG, GG and GL. In the experiments, 160 female birds from populations WG and GG, and 96 birds from population GL were tested up to the 6th production month. The main egg quality traits were controlled. The highest average egg weight was registered in WG group and the lowest in GL group, 14.04±0.32 g and 12.79±0.29 g respectively (p<0.05). The highest average Shape index was observed in group GG (78.31±0.53%), vs the lowest in WG quails (77.55±0.62%). Albumen proportion is almost 2/3 of egg mass, with average values from 57.14% in group WG tо 59.90% in group GG. Yolk proportion was about 30%, with smaller differences between the groups. The shell share from all tested groups comprised between 10.95 and 12.58% of egg weight. Average shell thickness was the greatest in eggs of WG quails (223.53±5.52 μm), and the lowest – in GG quails (216.91±6.83 μm). Egg quality traits were typical for the meat productive type of Japan quails.

Influence of housing system on the physical, morphological, and mechanical properties of Japanese quail eggs

“…Japanese quail eggs from cage housing system observed in this study were significantly heavier (11.85 vs. 10.93 g) than eggs from aviary housing system (P<0.05). The average weight of Japanese quail eggs from both housing systems observed in this study was close to values of 10.34 g reported by Song et al (2000), 10.58-11.60 g reported by Bagh et al (2016), 11.28 g reported by Kul and Seker (2004), and 11.9 g reported by Sari et al (2016), but some authors recorded lower values such as 7.04 g (Tabeekh, 2011) and 9.22 g (Sato et al, 1989) or higher values such as 12.50 g (Yilmaz et al, 2011), 12.53 g (Alasahan et al, 2015), 12.69 g (Polat et al, 2007), 12.76 g (Narinc et al, 2015), 12.79-14.04 g (Lukanov et al, 2019) and 13.25-13.71 g (Genchev, 2012). Kul and Seker (2004) considered that the differences between the results of the studies of Japanese quail egg quality could result from genetic structure, health condition, flock age, use of different content diets in feeding, and the differences in quail care and management conditions.…”

Influence of strain and flock age on geometrical and mechanical attributes of eggs produced from Japanese quail birds

“…Based on the strain effect, there was no significant difference between the two strains for yolk color. Lukanov et al (2019) and Drabik et al (2020), who worked on genotypes having different colors of plumage or eggshell, respectively, reported similar results, whereas Ezekiel et al (2020) stated a significant difference in yolk color between two studied strains of Japanese quail (Cinnamon Brown and Panda White). This might be due to different chemical composition of feeding or flock age.…”

“…As egg weight increased with flock age, the volume also increased. Generally, the average egg weight, and in turn, its related measurements corresponded to quail lines or breeds (Lukanov et al, 2019; Nowaczewski et al, 2010). The equality of egg weight produced from the different strains in the current study is entirely consistent with the findings of Fathi et al (2019) and Drabik et al (2020).…”

Application of Classification Techniques in the Analysis of External Characteristics of Eggs

“…In egg production, these processes are fully or partially automated [17,19]. When sorting eggs, part of the processes are automated and others are done manually and above all rely on the expert's visual judgment [18,20]. This type of assessment also determines the nature of the assessments.…”