Genotype–environment interaction in layer chickens in the growing stage: comparison of three genotypes at two different feeding levels with or without red mite (&amp;lt;i&amp;gt;Dermanyssus gallinae&amp;lt;/i&amp;gt;) infestation

ERDEM, Hakan; Savaş, Türker

doi:10.5194/aab-64-447-2021

Cited by 3 publications

(2 citation statements)

References 42 publications

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“…The results also showed a significant effect of line-by-treatment interaction for some studied traits (BW42, GR21–28, saturated O 2 , total CO 2 , ALT, creatinine, urea albumin, and liver %). Similarly, Erdem et al [ 56 ] indicated that young layer chickens’ genotype and dietary environment influenced their disease resistance. Interaction between the genetics and environment might decrease the effectiveness of breeding programs [ 57 ].…”

Section: Discussionmentioning

confidence: 99%

Influence of Improved Microclimate Conditions on Growth and Physiological Performance of Two Japanese Quail Lines

Emam

Elnesr

El-Full

et al. 2023

Animals

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Microclimate parameters (ammonia, ambient temperature, heat index, and relative humidity) surrounding birds affect the production and health status of poultry. Therefore, this study aimed to evaluate the impact of adding natural zeolite to the litter of Japanese quail on improving microclimate parameters and its reflection in growth performance, blood gases, and blood biochemical parameters. A total of 1152 chicks were obtained from the same hatch at the 20th selection generation. Chicks were allocated into two groups based on the litter composition: Group 1: wheat straw as litter (untreated group); Group 2: 80% wheat straw + 20% zeolite (treated group). Each group consisted of 576 chicks: 410 selected line chicks and 166 control line chicks. Significant and favorable effects of the treatment on microclimate parameters during tested periods were found to favor the treated group. Either the treated group or the selected line had significantly better growth performance than the untreated group and control line. Zeolite-treated quails had significantly desirable blood gases and lower blood acidity and serum total iron binding capacity compared to the untreated group. Thus, adding natural zeolite to the litter enhanced the microclimate parameters that improved growth performance, blood gases, and blood biochemical parameters and reduced ammonia emission.

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Section: Discussionmentioning

confidence: 99%

Influence of Improved Microclimate Conditions on Growth and Physiological Performance of Two Japanese Quail Lines

Emam

Elnesr

El-Full

et al. 2023

Animals

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“…Взаємодію "генотип-середовище" можна розглядати як зміну послідовності тих самих генотипів залежно від перебування в умовах різного середовища та як різницю в продуктивності, що спостерігається між середовищами, або як комбінацію цих двох факторів (Tixier-Boichard, 2018;Erdem & Savas, 2021;Greene et al, 2022).…”

Section: вступunclassified

Parameters of plasticity and stability of laying hens under the interaction “genotype × environment”

Khvostik,

Paskevych,

Fijalovych

2024

SMLNUVMBA

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The article presents the research results on the evaluation of the polygenically determined quantitative trait “laying” under the influence of the interaction “genotype × environment” on the comprehensive genetic material of chickens. Meat and egg hens of the original maternal form of domestic breeding, descendants of the first and second generations of different genesis, and improved synthetic populations performed it. The laying hens of the experimental groups were determined during seven months of egg laying. By using a two-factor variance analysis, a probable influence of genotypic affiliation (P < 0.05) and the month of egg laying (P < 0.001) on the level of manifestation of laying hens of the studied groups was established. The probable difference in the gradation of “condition” factors made it possible to evaluate the parameters of plasticity and stability in the studied groups of birds. The regression coefficient (bi) characterizes the average reaction of a group of individuals to a change in environmental conditions, that is, their plasticity, which makes it possible to predict the variability of the trait under the studied conditions. High bi-indicators indicate a more significant response of a group of chickens to a change in environmental conditions, influenced by active factors. That is, the larger the value of bi, the steeper the regression line, and the more sensitive the group is to changes in detention conditions. A zero or close to zero value of bi indicates that the group reacts poorly to changes in environmental conditions (in our case, the months of egg-laying). Plasticity analysis makes it possible to identify genotypes of birds with significant adaptability to changes in environmental conditions. The laying hens of the created synthetic population, the offspring of the first generation of different genetic origins, and the F2 hens of the “K-51” group were more plastic in laying. This indicates the slightest response of this bird to changes in environmental conditions. The “Ross” birds of the “K-22” and “K-32” groups of different generations and the original maternal form F10 were less plastic according to this feature; that is, they were more sensitive to the influence of active factors. The variant of stability (S2i) of the feature shows how reliably the selection feature of the studied group of birds corresponds to the plasticity estimated by the regression coefficient. The closer the S2i indicators are to zero, the less the empirical values of the characteristic differ from the theoretical values located on the regression line. The “Ross” hens of the second generation of the “K-22” and “K-32” groups were distinguished by their high laying stability (S2i=2.42–2.65). The least stable in terms of this polygenic trait was the “Kobb” chickens of the “K-51” and “K-5” groups (S2i=6.01–9.53). Hybrids of the first generation were characterized by more excellent laying stability than mothers.

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Kırmızı Akar (Dermanyssus gallinae) ile On Yıl

Savaş

2024

Hayvansal Üretim

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Kırmızı akar (Dermanyssus gallinae) kanatlı hayvanlarda kan emen gececil bir parazittir. Birçok çalışma kanatlı sektörüne söz konusu parazitin ekonomik zararını göstermiştir. Bu derlemede yazar ve çalışma arkadaşlarının kırmızı akar ile yaptıkları çalışmaların bir değerlendirilmesi yapılmıştır. Çalışmalarda popülasyon dinamiğini takip edebilmek için akarın yuvalanmasını sağlayacak yapılar tasarlanmış; bunların yardımı ile özellikle akar yoğunluğu tahmin edilmiştir. Bir akarın canlı ağırlığının ortalama 55 µg olduğu ve bir gecede 203 µg kan emebildiği belirlenmiştir. Parazitin tavuk ve bıldırcınların büyümesini olumsuz etkilediği, büyümenin erken dönemindeki bir enfestasyonun eşeysel olgunluğu geciktirdiği ve yumurta verimi ile yumurta ağırlığını düşürdüğü belirlenmiştir. Tavuklarda büyümenin hibrit genotiplerde akardan benzer şekilde etkilendiği, ancak saf genotiplerde farklılaşabildiği gözlenmiştir. Konakçının beslenmesinin akarın etkilerine nasıl yansıdığı konusunda çalışma bulunmamasına karşın, yem tüketiminin muhtemelen düşük akar yoğunluğunda arttığı, yüksek akar yoğunluğunda ise azalabileceği ortaya konmuştur. Yoğun akar enfestasyonunda (25.000 akar/kg) mortalitenin arttığı, parazit yoğunluğundaki her bir 1000 akar artışının bir kuşun (yaklaşık 100g canlı ağırlığında) ölüm riskine %11 arttırdığı bulunmuştur. Enfestasyon altındaki hayvanlarda konfor davranışı sayılamayacak sıklıktaki kaşınma ile lokomosyon artışının ek bir enerji kaybına neden olabileceği; yanı sıra akarın kuşun derisi üzerinde gezinmesi ve ısırıkları nedeniyle oluşan stresin de hayvanların refahını önemli ölçüde olumsuz olarak etkileyebilmesi olasıdır.

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Genotype–environment interaction in layer chickens in the growing stage: comparison of three genotypes at two different feeding levels with or without red mite (<i>Dermanyssus gallinae</i>) infestation

Cited by 3 publications

References 42 publications

Influence of Improved Microclimate Conditions on Growth and Physiological Performance of Two Japanese Quail Lines

Influence of Improved Microclimate Conditions on Growth and Physiological Performance of Two Japanese Quail Lines

Parameters of plasticity and stability of laying hens under the interaction “genotype × environment”

Kırmızı Akar (Dermanyssus gallinae) ile On Yıl

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