Effect of long-term selection for egg production on eggshell quality of Japanese quail (Coturnix japonica)

Fathi, M. M.; Eldlebshany, Amira; El-Deen, M. Bahie; Radwan, Lamiaa M.; Rayan, Gamal

doi:10.3382/ps/pew233

Cited by 19 publications

(14 citation statements)

References 20 publications

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“…Descriptive statistics for the external and internal egg quality traits are presented in Table 1. These findings are within the ranges for Japanese quail reported by Taha (2009), who found EN ranged from 51.97 to 72.83, and Fathi et al (2016), who observed average ENs of 57.0 and 65.8 eggs in the control and selected lines, respectively. The present study revealed that the average EW was 13.63 g. Khaldari et al (2010) and Copur et al (2010) reported similar averages of 13.40 g and 13.25 g. In contrast, lower EW with a range of 10.27 -12.76 g was reported for quails by Hassan et al (2003), Kul and Seker (2004), Sari et al (2016), Al-Daraji et al (2010), andNarinc et al (2015).…”

Section: Resultssupporting

confidence: 90%

“…Round eggs and unusually long eggs do not look 'right', and do not fit well in egg cartons. These eggs are much more likely to be broken during shipment than those of normal shape, resulting in economic losses for breeders and traders (Uluocak, 1995;Fathi et al, 2016). Eggs that look abnormal are more likely to be rejected by the consumer, whereas defects in eggshell ultrastructure can result in breakage or impaired development of the embryo during incubation (Mills et al, 1994;Roberts, 2004;Duman et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Many selection programmes have sought to improve Japanese quail egg production, but these focused mostly on external egg traits (Minvielle, 1998;Cheng, 2002). Fathi et al (2016) revealed that selection for higher EN and lower broken eggshell percentage improved ultrastructural features of the mammillary layer rather than selection for EST. Narinc et al (2015) stated that specific gravity may be the selection criterion of choice for genetic improvement of eggshell quality.…”

Section: Introductionmentioning

confidence: 99%

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Influence of selection for egg production on egg quality traits in Japanese quail

El-Attrouny¹,

Iraqi²

2021

SA J. An. Sci.

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The current study investigated the influence of selection for increased egg production on external and internal egg quality traits over five generations in Japanese quail. A total of 4325 fresh eggs from 1326 females were collected each week during the egg-laying period to estimate heritability, genetic and phenotypic correlations, and correlated response of external and internal egg quality traits to selection for egg number (EN). The direct response to selection indicated an increase of 7.7 ± 0.27 eggs produced during the 90 days following production of the first egg. The correlated responses to selection indicated that selection for higher EN can be expected to increase EW and increase egg quality. Estimates of heritability ranged from 0. 11 to 0.35 for external egg quality traits and from 0.08 to 0.32 for internal egg quality traits. Estimates of the genetic correlations of EN with external and internal traits were positive, ranging from 0.09 to 0.25 and from 0.02 to 0.27, respectively. These estimates indicated few if any genetic antagonisms that would adversely affect selection response. However, eggshell thickness would not be expected to change as a result of selection for EN. Thus, the external and internal quality of Japanese quail eggs could be improved by selection for high egg production.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of selection for egg production on egg quality traits in Japanese quail

El-Attrouny¹,

Iraqi²

2021

SA J. An. Sci.

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“…A total of 460 eggs (230 eggs from each variety) were collected at 16 weeks of age. External and internal egg quality measurements were assessed according to Fathi et al [8]. Each egg was weighed to the nearest 0.1 g. Egg width (equatorial axis) and egg length (longitudinal axis) were measured using Vernier caliper to 0.1 mm.…”

Section: Methodsmentioning

confidence: 99%

Assessment of Residual Feed Intake and Its Relevant Measurements in Two Varieties of Japanese Quails (Coturnixcoturnix japonica) under High Environmental Temperature

Fathi

Al-Homidan

Ebeid

et al. 2019

Animals

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Three hundred and ten 12-week-old laying Japanese quails (Coturnixcoturnix japonica) from gray and white varieties (155 each) were randomly selected from the initial population and kept in individual battery cages. The measurements of growth and egg production were determined to derive residual feed intake (RFI). The relationship between RFI and egg quality, blood parameters, and carcass characteristics was also determined. The results indicated that the gray quails had significantly higher egg mass and lower broken eggs compared to the white quails. A significant increase of eggshell strength and shell percentage was found in eggs produced from gray quails compared to their white counterparts, although their shell thickness means weresimilar. The results of multiple regression analysis clearly identified a significant effect of metabolic body weight and egg mass for the computation of expected feed intake, rather than body weight gain, in both varieties of Japanese quails. A strong positive correlation between RFI and feed intake in both gray and white quail varieties was found. The same trend was also observed for feed conversion ratio (FCR). Therefore, including RFI in the selection criteria of Japanese quails in order to improve FCR under high environmental temperature is highly recommended.

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“…These palisade layers are the columnar shape with the spongy structure. The narrow columnar shape provides high strength against breakage to the eggshell and shell thickness ( Ahmed et al, 2005 ; Fathi et al, 2016 ). The cuticle is the last layer to be deposited on the shell before egg laying.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Hen Aging on Eggshell Ultrastructure and Shell Mineral Components

Park

Sohn

2018

Korean J Food Sci Anim Resour

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The eggshell, which is a complex and highly ordered structure, is very important factor for food safety and egg marketing. This study investigated the changes in eggshell structure and shell components in relationship to hen age. For this study, we examined the histological change of the endometrium of the 30-, 60-, and 72-wk-old commercial layers, and analyzed the ultrastructure and ionic composition of their eggshells. The results showed that histological deformation, fibrosis, atrophy and elimination of micro-villi in the uterus endometrium were found through microscopic observation that was associated with increasing hen age. Concentration of blood-ion components such as Ca2+, Na+, K+, and Cl– ions did not change with age. Along with the results from the ultrastructure analysis of the eggshell, the palisade layer ratio and the density of mammillary knobs were significantly decreased in older hens. In addition, the type B mammillary knobs were frequently observed with increasing hen age. In the mineral element assay from the eggshell, Ca2+, S2–, and Co2+ significantly decreased with increasing hen age, whereas Na+, K+, and V2+ significantly increased. Therefore, the damages of endometrial tissue inhibit the processes of ion transmission and the crystallization of eggshell formation, resulting in a large and non-uniform mammillary knob formation. This means the conditions of endometrial cells affect the formation of the eggshell structure. In conclusion, hen aging causes the weakness of the eggshell and degrades the eggshell quality.

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Effect of long-term selection for egg production on eggshell quality of Japanese quail (Coturnix japonica)

Cited by 19 publications

References 20 publications

Influence of selection for egg production on egg quality traits in Japanese quail

Influence of selection for egg production on egg quality traits in Japanese quail

Assessment of Residual Feed Intake and Its Relevant Measurements in Two Varieties of Japanese Quails (Coturnixcoturnix japonica) under High Environmental Temperature

The Influence of Hen Aging on Eggshell Ultrastructure and Shell Mineral Components

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