Comparative analysis of the external and internal egg quality in different pure chicken breeds

Hrnčár, Cyril; Biesiada–Drzazga, Barbara; Nikolova, N.; Hanusová, Emília; Hanuš, A.; Bujko, Jozef

doi:10.15414/afz.2016.19.si.123-127

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…Shape index is thus an important trait not only in production, but in trade as well. Irrespective of the breed of hen, among the morphological components the share of white was the highest and that of the shell was the lowest, which is in agreement with other studies (Banaszewska et al, 2018;Biesiada-Drzazga and Janocha, 2009;Hrnćar et al, 2016;Roberts, 2004). The analysis of parameters of morphological components revealed statistical differences depending on the hen's genotype (Table 3).…”

Section: Resultssupporting

confidence: 90%

“…The shell thickness was in the recommended range of 0.25-0.45 mm. Biesiada-Drzazga and Janocha (2009) report similar results for Hy-Line Brown, but Hrnćar et al (2016) noted thicker shells and determined that this parameter was influenced by the hen's genotype. It should be noted that shell thickness depends on genetic and environmental factors, mainly diet (Biesiada-Drzazga et al, 2014;Czaja and Gornowicz, 2006;Roberts, 2004;Van Den Brand et al, 2004).…”

Section: Resultsmentioning

confidence: 72%

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The effect of the genetic origin of hens on selected egg traits

Biesiada–Drzazga¹,

Banaszewska²,

Wielogórska³

et al. 2020

Acta Sci Pol Technol Aliment

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Background. Eggs have been considered an important component of the human diet for centuries. There is currently a wide assortment of eggs available to consumers, varying in terms of weight (from S to XL), housing system (0 to 3), diet, packaging, etc. Although the egg's nutritional value is most important to consumers, their perceptions are unfortunately generally based not on facts, but on popular opinion. Most commercial lines of laying hens used in Poland are of foreign origin. However, some farms use commercial lines from Polish breeding farms. Therefore, research was undertaken to determine selected characteristics of eggs obtained from hens of different origins raised in an intensive system, i.e. industrial production of eggs. Material and methods. The research material consisted of eggs from Hy-Line Brown and Messa 43 hens from large-scale production. The eggs were obtained from hens at the ages of 35, 40 and 45 weeks. The analysis included selected external and internal characteristics of eggs laid during the study period. The eggs were evaluated immediately after laying, and the following quality parameters were determined: egg weight, shell weight, shell thickness, white weight, yolk weight, and pH of white and yolk. Chemical analysis of dry matter, total protein, crude fat and crude ash content in the whites and yolks was performed. The cholesterol content and fatty acid profile in the yolk were analysed as well. A statistical analysis of the results was performed. Results. The analyses revealed significant differences in the weight and morphological composition of eggs depending on the genotype of the hens. Compared to eggs obtained from Hy-Line Brown hens, eggs from Messa 43 hens had significantly lower shell thickness, greater weight between 35 and 45 weeks of age, a larger proportion of shell, and a smaller proportion of albumen. Yolks and whites of eggs from Hy-Line Brown hens contained significantly more dry matter and total protein than those of Messa43 chickens, while the cholesterol content in the yolks of both groups was similar. The fatty acid profile of the egg yolk was similar irrespective of the origin of the hens. Conclusions. Significant differences in egg weight and the parameters of morphological components of eggs were found between the experimental groups. Genotype did not influence cholesterol content or the fatty acid profile in the yolk.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 72%

The effect of the genetic origin of hens on selected egg traits

Biesiada–Drzazga¹,

Banaszewska²,

Wielogórska³

et al. 2020

Acta Sci Pol Technol Aliment

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“…The average shell thickness decreased from 429.30 ±1.25 µm to 420.98 ±1.30 µm (P <0.0001) during the laying. The egg shell thickness values were somewhat higher in comparison to Hanusová et al (2015) and Hrnčár et al (2016).…”

Section: Resultsmentioning

confidence: 71%

Eggs quality of Oravka breed hens depending on hen´s age

Hanusová¹,

Hanuš²,

Hrnčár³

2021

Acta fytotechn zootechn

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Licensed under a Creative Commons Attribution 4.0 International License The objective of this study was to compare some internal and external quality parameters of eggs during laying period at 7, 8 and 13 months of hen´s age.Hens of genetic animal resources of the Oravka breed from NAFC-RIAP Nitra were included in experiment. In our experiment the average egg weight was significantly increased with the age of the laying hens (P <0.0001, P = 0.0076). There were significant differences in egg length and egg width, but no significant differences in egg shape index. The thickness of eggshell was demonstrably thinner in all measured positions of the egg with increasing age of laying hens. The average eggshell thickness decreased from 429.30 ±1.25 µm to 420.98 ±1.30 µm (P <0.0001) during the laying The albumen weight during laying varied from 31.29 ±0.36 g to 33.22 ±0.35 g. Albumen height and Haugh unit measure the viscosity of the thick albumen. The Haugh unit in Oravka breed were lower in the oldest hens (69.17 ±1.36). All yolk characteristics increased with age. The yolk weight increased from 14.64 ±0.21 g at the age of 7 months to 19.67 ±0.27 g at the age of 13 months (P <0.0001). We found significant differences in yolk colour only between hens of 8 and 13 months age (P = 0.0021).

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Genetic diversity, population structure and ancestral origin of KwaZulu-Natal native chicken ecotypes using microsatellite and mitochondrial DNA markers

Nkosinathi

Ceccobelli

Cardinali

et al. 2020

Italian Journal of Animal Science

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South African native chicken breeds are no exception to the declining of local domestic breeds that has long been recognised and found associated with the commercialisation of breeding in domestic animals. The aims of the study were: (i) to provide a comprehensive view of genetic variation in four KwaZulu-Natal indigenous chicken populations (Jozini, Newcastle, Pietermaritzburg, and Port Shepstone), and (ii) to estimate the extent of differentiation of the village populations from three conserved South African indigenous pure breeds (Potchefstroom koekoek, Ovambo, and Venda) by genotyping individuals at 19 autosomal microsatellite loci. Finally, (iii) new information to the history of KwaZulu-Natal indigenous chicken populations was made available by exploring their phylogenetic relationship and their possible maternal origin through the mitochondrial DNA. The results suggested noticeable genetic diversity within and between ecotypes with clear sub-structuring between them. The indigenous populations had high genetic diversity (observed heterozygosity ranging from 0.61 in Pietermaritzburg to 0.70 in Jozini) while conserved populations showed considerable within population inbreeding coefficient (from 0.01 in Potchefstroom koekoek to 0.18 in Ovambo). Median-joining network analyses indicated the dominance of haplogroup E suggesting a likely Southeast Asia and/or Indian subcontinent origin. The presence of haplogroup B and C not only emphasises multiple maternal origin but also highlights genetic introgression of local chickens with commercial genotypes. These results highlighted the importance of local breeds as a genetic reservoir; moreover, the conservation of local breeds may play an important role in the local economy as a source of high-quality products for consumers. HIGHLIGHTS The genetic variation and differentiation of KwaZulu-Natal indigenous chicken populations and pure South African chicken breeds is investigated. The village populations showed a noticeable genetic variability with clear sub-structuring between them. The results can be used to improve a sustainable breeding and conservation programs to control possible genetic dilution with commercial genotypes.

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Comparative analysis of the external and internal egg quality in different pure chicken breeds

Cited by 5 publications

References 15 publications

The effect of the genetic origin of hens on selected egg traits

The effect of the genetic origin of hens on selected egg traits

Eggs quality of Oravka breed hens depending on hen´s age

Genetic diversity, population structure and ancestral origin of KwaZulu-Natal native chicken ecotypes using microsatellite and mitochondrial DNA markers

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