The Influence of Quantity of Thick Albumen on Internal Egg Quality Measurements

Baker, R. C.; Vadehra, D. V.

doi:10.3382/ps.0490493

Cited by 8 publications

(3 citation statements)

References 6 publications

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“…An average of three eggs per bird was used in the analyses. The procedures for measuring the egg composition and for the separation of thick and thin white were carried out as previously described 55 , 56 . All eggs were kept in the same storage room and measured within 12 h after egg laying.…”

Section: Methodsmentioning

confidence: 99%

RNA-Seq reveals seven promising candidate genes affecting the proportion of thick egg albumen in layer-type chickens

Wan

Jin

et al. 2017

Sci Rep

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Eggs with a much higher proportion of thick albumen are preferred in the layer industry, as they are favoured by consumers. However, the genetic factors affecting the thick egg albumen trait have not been elucidated. Using RNA sequencing, we explored the magnum transcriptome in 9 Rhode Island white layers: four layers with phenotypes of extremely high ratios of thick to thin albumen (high thick albumen, HTA) and five with extremely low ratios (low thick albumen, LTA). A total of 220 genes were differentially expressed, among which 150 genes were up-regulated and 70 were down-regulated in the HTA group compared with the LTA group. Gene Ontology (GO) analysis revealed that the up-regulated genes in HTA were mainly involved in a wide range of regulatory functions. In addition, a large number of these genes were related to glycosphingolipid biosynthesis, focal adhesion, ECM-receptor interactions and cytokine-cytokine receptor interactions. Based on functional analysis, ST3GAL4, FUT4, ITGA2, SDC3, PRLR, CDH4 and GALNT9 were identified as promising candidate genes for thick albumen synthesis and metabolism during egg formation. These results provide new insights into the molecular mechanisms of egg albumen traits and may contribute to future breeding strategies that optimise the proportion of thick egg albumen.

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Section: Methodsmentioning

confidence: 99%

RNA-Seq reveals seven promising candidate genes affecting the proportion of thick egg albumen in layer-type chickens

Wan

Jin

et al. 2017

Sci Rep

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“…Wesley and Stadelman (1959) and Baker and Vadehra (1970) Sauter et al (1953) studied the relationship of candled quality of eggs with other quality measurements. They found that there was a highly significant correlation between candling quality and albumen index, yolk index, yolk color, albumen score, and pH.…”

Section: Review Of Literaturementioning

confidence: 98%

A Comparison of Candling Eggs With Other Methods of Determining Internal Egg Quality

Baker

Vadehra

1972

Poultry Science

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The eggs from 23 strains of White Leghorns were used to study different internal egg quality measurements. Twenty-five eggs from each of the strains were candled by three experienced persons the day after the eggs were laid. After candling, the eggs were broken-out, and internal quality was determined by U.S.D.A. scores, Haugh units, albumen height and yolk index. The entire experiment was repeated using seven-day old eggs. Correlations were run on all of the strains for each of the internal quality measurements.There appears to be a high correlation between such measurement,? as U.S.D.A. scores and albumen height, U.S.D.A. scores and Haugh units, and albumen height and Haugh units. Candling did not appear to correlate with any of the other measurements of internal egg quality. There was a poor correlation between yolk index and other measurements. The "i" values on all of the measurements varied considerably airjpng the twenty-three strains.Analysis of variance was used to detect differences among the candlers. The results show that there was a highly significant difference among the individuals who candled the eggs.

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“…This change probably had more influence on the reduction of interior quality than did the decrease in total albumen. Thick albumen, when considered by itself, is known to be poorly correlated with interior quality (Sturkie and Polin, 1954;Baker and Vadehra, 1970). Inner thin albumen is enveloped by thick.…”

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confidence: 99%

Egg Changes Associated with Reduced Interior Quality Because of Dietary Vanadium Toxicity in the Hen

Eyal

Moran

1984

Poultry Science

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Ammonium metavanadate was added to a control low vanadium corn-soybean meal laying ration (2 mg/kg) to supply 20 and 30 mg/kg added vanadium. Single Comb White Leghorn hens at 33 weeks of age were given the control feed for 4 weeks, then three groups having equivalent performance were formed. Dietary treatments were imposed for a subsequent 4 weeks.Treatment comparisons were made on the differences arising between the standardization and experimental periods. Adding vanadium had no effect on egg production and feed intake; however, birds receiving 30 mg/kg did not gain as much weight as those receiving other treatments. Eggs were examined on the day following collection for the last 4 days of each period. Egg weight was unaffected by vanadium, but Haugh units were reduced. Total albumen decreased with interior quality while the proportion of outer thin increased at the expense of inner thin albumen. Protein concentration and electrophoretic pattern of each albumen were unaltered.Removal of the oviduct at termination of the experiment revealed that magnum weight was reduced at the highest level of vanadium. Deterioration of internal quality by vanadium is speculated to be mediated by an inhibition of magnum motility during egg formation. Based on all albumen measurements, functional properties that could affect consumer use are not anticipated. (

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The Influence of Quantity of Thick Albumen on Internal Egg Quality Measurements

Cited by 8 publications

References 6 publications

RNA-Seq reveals seven promising candidate genes affecting the proportion of thick egg albumen in layer-type chickens

RNA-Seq reveals seven promising candidate genes affecting the proportion of thick egg albumen in layer-type chickens

A Comparison of Candling Eggs With Other Methods of Determining Internal Egg Quality

Egg Changes Associated with Reduced Interior Quality Because of Dietary Vanadium Toxicity in the Hen

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