scholarly journals PSIV-3 Late-Breaking: Transcriptomic analysis in the liver of aged brown-egg laying hens with different intensity of eggshell color.

2018 ◽  
Vol 96 (suppl_3) ◽  
pp. 286-286
Author(s):  
G Han ◽  
D Kil ◽  
D Goo ◽  
G Park ◽  
J Kim ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Laying ◽  
Transcriptomic Analysis ◽  
Eggshell Color

scholarly journals Eggshell color in brown-egg laying hens — a review

2015 ◽  
Vol 94 (10) ◽  
pp. 2566-2575 ◽  
Author(s):  
S. Samiullah ◽  
J.R. Roberts ◽  
K. Chousalkar
Keyword(s):  
Laying Hens ◽  
Egg Laying ◽  
Eggshell Color

scholarly journals Mitigation Effects of Bentonite and Yeast Cell Wall Binders on AFB1, DON, and OTA Induced Changes in Laying Hen Performance, Egg Quality, and Health

Toxins ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 156
Author(s):  
Ling Zhao ◽  
Yue Feng ◽  
Jing-Tao Wei ◽  
Meng-Xiang Zhu ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Dietary Supplementation ◽  
Basal Diet ◽  
Liver Weight ◽  
Laying Hen ◽  
Egg Laying ◽  
Villus Height ◽  
Crypt Depth ◽  
Induced Changes

The objective of this study was to evaluate the efficacy of mycotoxin binders in reducing the adverse effects of co-occurring dietary aflatoxin B1 (AFB1), deoxynivalenol (DON) and ochratoxin A (OTA) on laying hens. Three hundred and sixty 26-week-old Roman laying hens were randomly allocated into four experimental groups with 10 replicates of nine birds each. The four groups received either a basal diet (BD; Control), a BD supplemented with 0.15 mg/kg AFB1 + 1.5 mg/kg DON + 0.12 mg/kg OTA (Toxins), a BD + Toxins with Toxo-HP binder (Toxins + HP), or a BD + Toxins with TOXO XL binder (Toxins + XL) for 12 weeks. Compared to the control, dietary supplementation of mycotoxins decreased (P < 0.10) total feed intake, total egg weight, and egg-laying rate, but increased feed/egg ratio by 2.5–6.1% and mortality during various experimental periods. These alterations induced by mycotoxins were alleviated by supplementation with both TOXO HP and XL binders (P < 0.10). Furthermore, dietary mycotoxins reduced (P < 0.05) eggshell strength by 12.3% and caused an accumulation of 249 μg/kg of DON in eggs at week 12, while dietary supplementation with TOXO HP or XL mitigated DON-induced changes on eggshell strength and prevented accumulation of DON in eggs (P < 0.05). Moreover, dietary mycotoxins increased relative liver weight, but decreased spleen and proventriculus relative weights by 11.6–22.4% (P < 0.05). Mycotoxin exposure also increased alanine aminotransferase activity and reduced immunoglobulin (Ig) A, IgM, and IgG concentrations in serum by 9.2–26.1% (P < 0.05). Additionally, mycotoxin exposure induced histopathological damage and reduced villus height, villus height/crypt depth, and crypt depth in duodenum, jejunum and (or) ileum (P < 0.05). Notably, most of these histological changes were mitigated by supplementation with both TOXO HP and XL (P < 0.05). In conclusion, the present study demonstrated that the mycotoxin binders TOXO HP and XL can help to mitigate the combined effects of AFB1, DON, and OTA on laying hen performance, egg quality, and health.

scholarly journals Influence of the energy and digestible lysine contents of the diet on performance and egg quality traits of brown-egg laying hens from 19 to 59 weeks of age

2021 ◽  
pp. 101211
Author(s):  
R. Scappaticcio ◽  
J. Garcia ◽  
G. Fondevila ◽  
A.F. de Juan ◽  
L. Cámara ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Egg Laying ◽  
Quality Traits

Ovarian transcriptomic analysis of black Muscovy duck at the early, peak and late egg-laying stages

Gene ◽  
2021 ◽  
Vol 777 ◽  
pp. 145449
Author(s):  
Zhigang Hu ◽  
Jing Liu ◽  
Junting Cao ◽  
Huilin Zhang ◽  
Xiaolin Liu
Keyword(s):  
Egg Laying ◽  
Transcriptomic Analysis ◽  
Muscovy Duck ◽  
Early Peak

scholarly journals The Effect of Age and Genotype on Quality of Eggs in Brown Egg‑Laying Hybrids

2019 ◽  
Vol 67 (2) ◽  
pp. 407-414 ◽  
Author(s):  
Adam Kraus ◽  
Lukáš Zita
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Shape Index ◽  
Egg Laying ◽  
Average Weight ◽  
Eggshell Thickness ◽  
External Quality ◽  
Technological Value ◽  
Effect Of Age

The aim was to assess the internal and external quality of consumer eggs of egg‑laying hens of two selected genotypes depending on their age. All of these hens were kept in enriched cages. There were compared eggs from Hy‑Line Brown and ISA Brown hens at the age from 36 to 64 weeks. In total, 3840 eggs from 300 hens were evaluated. Quality of eggs was determined by their technological value. Statistically significant interactions (P = 0.001) between age and genotype were found in all evaluated parameters except for the yolk colour (P = 0.044), whereas there was not found interaction (P = 0.072) between age and genotype in eggshell strength. The significant effect of hens’ age was found in all evaluated parameters, with the only exception of the yolk colour. The results showed that the average weight of eggs, eggshell, albumen and yolk increased with the age. Also the eggshell proportion, its colour and yolk index values ​​increased, whereas the egg shape index, eggshell thickness and strength, albumen proportion, Haugh units, the albumen and the yolk index decreased. Statistically significant effect of the genotype was found in all evaluated parameters except for the yolk index. When comparing both genotypes, the eggs from ISA Brown hens had a better quality. The trend of deteriorating egg quality with age was confirmed.

scholarly journals EGG-LAYING HENS’ REACTION ON CHRONIC AND ACUTE (SLAUGHTERING) STRESS

2019 ◽  
Vol 238 (2) ◽  
pp. 76-82
Author(s):  
K.V. Zhuchaev ◽  
◽  
L.I. Sulimova ◽  
M.L. Kochneva ◽  
A.A. Saveliev ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Laying
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