Sample Sizes Required for Predicting Albumen Quality in Stored Eggs From Eight Commercial Stocks

Hill, A. T.; Eissinger, R. C.; Hamilton, Donald M.; Patko, J.

doi:10.4141/cjas80-116

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…IB). Mueller et al (1960), Kline et al (1965), andHill et al (1980) also noted that the variability of egg albumen quality increased with the age of the birds.…”

Section: Resultsmentioning

confidence: 88%

“…Kline et al (1965) and Hill et al (1980) demonstrated that variability of Haugh units increases with age of layer. The aims of the present study were to assess the effect of age of hens on the albumen quality of eggs for five commercial strains of White Leghorn commonly used in Canada, using the modified albumen height gauge described by Buckley et al (1981), with a view towards establishing guidelines for future quality control programs.…”

Section: Introductionmentioning

confidence: 96%

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Egg Quality. 2. Albumen Quality of Eggs from Five Commercial Strains of White Leghorn Hens During One Year of Lay

et al. 1986

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Egg weight and albumen height of a sample of 160 eggs from each of five commercial strains of White Leghorn hens were measured at each of 18 sampling times between 197 and 484 days of age for a total of 14,400 eggs. Age (P<.01) and strain (P<.05) were the main factors affecting interior egg quality. Both albumen height and Haugh units decreased at an approximately constant rate over time. An electronic albumen meter was used to measure albumen height. The tip of the measuring rod had to be kept free of dried albumen to prevent measurement errors.(Key words: commercial strains, age of hen, albumen meter, interior quality, variability)

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“…IB). Mueller et al (1960), Kline et al (1965), andHill et al (1980) also noted that the variability of egg albumen quality increased with the age of the birds.…”

Section: Resultsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 96%

Egg Quality. 2. Albumen Quality of Eggs from Five Commercial Strains of White Leghorn Hens During One Year of Lay

et al. 1986

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“…일반적으로 난각은 6개의 층으로 구성되고, 가장 안쪽에는 난황과 난백 을 직접적으로 싸는 막과 외부 막층 가까이 있는 섬유질 막 은 난각의 석회화에 관여한다 (Tyler, 1969;Pooley, 1979). 난 각의 질은 품종과 같은 유전적 요인뿐만 아니라, 영양적 요 인, 환경적 요인 및 산란 연령과 같은 다양한 요인에 의해 영 향을 받는다 (Roland, 1979;Hill et al, 1980;Peebles and Brake, 1987;Williams, 1992;Suk and Park, 2001;Samli et al, 2005;Akyurek and Okur, 2009;Jin et al, 2011;Roberts et al, 2013;Lee et al, 2016 (Soares, 1984;Bar et al, 1999;Dacke, 2000;Ingleton, 2002;Silverman, 2003;Huang et al, 2006;Ramasamy, 2006;Talmage and Mobley, 2008;Bar, 2009 (Griffin, 1992;Walzem, 1996;Davis, 1997;Dacke, 2000;Bar, 2008). 난각은 이온뿐만 아니라, OCX-32, OCX-36, OC-17, OC-116, Osteopontin 등의 단백 질로 구성되며, 이들 중 OCX-32는 uterine specific protein으 로 난각의 석회화 및 외부각질화에 작용한다.…”

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Histological Change of Uterus Endometrium and Expression of the Eggshell-related Genes according to Hen Age

Park¹,

Cho²,

Park³

et al. 2017

Korean Journal of Poultry Science

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The eggshell is an intricate and highly ordered structure composed of multiple layers and a calcified matrix. The eggshell is formed at the uterine segment of the chicken oviduct. In this study, histological changes in the uterine endometrium and the expression of the eggshell-related genes were investigated according to hen age. We analyzed the expression of eggshell protein-related genes, such as OCX-32, OCX-36, OC-17, OC-116, and eggshell-ion-related genes, such as CABL-1, SPP1, SCNN1G, ATP2A2, CA2, and CALM1. In chicken uterine endometrium, histological deformation, fibrosis, atrophy and elimination of micro-villi were found with increasing hen age. The concentration of blood-ion components did not significantly change with age. The amount of telomeric DNA in uterine endometrial cells decreased with increasing hen age. The expression of most of the eggshell-related genes changed significantly with increasing hen age. The expression of some ovo-proteins, which play a role in eggshell formation, increased with increasing hen age; however, there were no significant correlations among eggshell protein genes. Eggshell ion-related genes, such as ATP2A2, SCNN1G, CA2, and CALM1, were closely related to each other. The OCX-32 and OCX-36 genes were closely related to some of the eggshell ion genes. Eggshell protein-related genes, such as the OCX-32, OCX-36 genes and ion-related genes such as CALB-1, ATP2A2, SCNN1G, CA2, CALM1, affected eggshell formation, mutually or independently. This study shows that, uterine although endometrial cell damage occurs with increasing hen age, normal eggshells can be formed in old hens. This suggests that eggshell protein-and eggshell ion-related genes also control the homeostasis of eggshell formation.

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Some factors affecting albumen quality with particular reference to Haugh unit score

Williams

1992

World's Poultry Science Journal

200

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Sample Sizes Required for Predicting Albumen Quality in Stored Eggs From Eight Commercial Stocks

Cited by 5 publications

References 8 publications

Egg Quality. 2. Albumen Quality of Eggs from Five Commercial Strains of White Leghorn Hens During One Year of Lay

Egg Quality. 2. Albumen Quality of Eggs from Five Commercial Strains of White Leghorn Hens During One Year of Lay

Histological Change of Uterus Endometrium and Expression of the Eggshell-related Genes according to Hen Age

Some factors affecting albumen quality with particular reference to Haugh unit score

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