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

Lukanov, H.; Genchev, A.; Kolev, P.

doi:10.15547/tjs.2019.01.008

Cited by 6 publications

(4 citation statements)

References 17 publications

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“…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.…”

Section: Discussionmentioning

confidence: 85%

“…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).…”

Section: Discussionmentioning

confidence: 99%

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

Fathi

Aloyaydi

Al-Homidan

et al. 2021

Animal Science Journal

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We investigated how the geometrical and mechanical properties of eggshell of Japanese quail are affected by strain and flock age. Two strains of quail (white and gray) were used in the current experiment. The results showed that there was no significant difference for all geometric measurements due to strain effect. Eggs produced from the older birds showed significantly higher (P < 0.01) values compared with younger age for all studied traits. Eggs produced from quails at 22 weeks had a significantly (P < 0.01) darker yolk color than that of the younger age. Superiority in shell thickness, shell weight, and breaking force was detected in eggs of gray quails compared with white quails. On the other hand, the eggs from white quails had significantly higher values for static stiffness and Young's modulus as compared with those of gray counterparts. A significant decrease (P < 0.01) was found for fracture toughness and Young's modulus in eggs of aged birds. A significant negative relationship was found between the breaking force and both static stiffness and Young's modulus. A significant positive relationship was observed between breaking force and both shell thickness and shell percentage. The phenotypic correlation between eggshell breaking force and toughness was relatively high.

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Section: Discussionmentioning

confidence: 85%

Section: Discussionmentioning

confidence: 99%

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

Fathi

Aloyaydi

Al-Homidan

et al. 2021

Animal Science Journal

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“…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.…”

Section: Initroductionmentioning

confidence: 99%

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

Georgieva-Nikolova¹,

Zlatev²

2019

ARTTE

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In this article a comparative analysis is made to determine the influence of vectors of selected features derived from geometric, optical and dielectric characteristics of eggs on the accuracy of classification, depending on their weight. Suitable for classification are the principal components and latent variables that reduce feature vectors containing shape indices (D, A, V), spectral indices (TVI, GLI), dielectric characteristics (C, k), selected by four methods (CORR, SFCPP, RELIEFF, FSRNCA). By comparative studies it is found that the use of classification methods (DT, DA, SVM) are more effective in predicting weight of hen eggs than in quail eggs. The proposed egg analysis methods take precedence over the known solutions in this field as it takes into account changes in the internal properties of quail and hen eggs when stored.

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“…The peak of egg production in quail occurred at partperiod (3 months) egg number of laying with the egg production rate ranged from [22][23][24][25] 85 to 95%. It was illustrated that genetic improvement for increasing egg numbers would increase the production rate and profitability of Japanese quail 12,26 .…”

Section: Introductionmentioning

confidence: 99%

Correlated Responses to Short-term Selection for Egg Production Traits in Japanese Quail

El-Attr¹,

Iraqi²

2020

Asian J. of Poultry Science

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Background and Objective: Poultry industry aims mainly to produce genetically superior animals with high productivity of egg and meat.On a commercial scale, the purpose of most quail genetic improvement programs is to select genetically superior birds for meat and egg production. The objective of this study was to investigate the effect of short-term selection through four generations of selection in Japanese quail on egg number at the first 90 days of laying, estimate genetic parameters of egg production traits and estimate the correlated response to selection. Materials and Methods: Data of 1,352 female Japanese quails were collected through five consecutive generations (base and four selected generations) to estimate genetic gain, depending on breeding values, for Age at First Egg (AFE), Body Weight at Sexual Maturity (BWSM), Weight at First Egg (WFE), Egg Number at first 90 days (EN90D) and Average Egg Weight (AEW). Results: Estimates of heritability for egg production traits were ranged from 0.17 to 0.26. Moreover, positive genetic correlations were detected (0.18 to 0.43) between all studied egg production traits, except the correlation between AFE and EN90D (-0.32). The contrast among estimates was significant (p<0.05), favoring the selected generations over the base. The cumulative selection response was favorable for all unselected traits with the superiority of the selected generations to the base generation. Conclusions: It can be concluded that early selection based on breeding value for a cumulative egg number at first 90 days of egg production can effectively improve the total egg production and other egg traits in Japanese quail through four selected generations.

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

Cited by 6 publications

References 17 publications

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

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

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

Correlated Responses to Short-term Selection for Egg Production Traits in Japanese Quail

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