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Effects of Egg Weight on Egg Quality Traits of Potchefstroom Koekoek Chicken Genotype

Effects of Egg Weight on Egg Quality Traits of Potchefstroom Koekoek Chicken Genotype

Thobela Louis Tyasi1*, Lebo Trudy Rashijane1, Kwena Mokoena1, Kagisho Madikadike Molabe1, Madumetja Cyril Mathapo1, Victoria Rankotsan Hlokoe1, Lebelo Joyceline Selala1, Masixole Maswana1 and Lubabalo Bila2

1School of Agricultural and Environmental Sciences, Department of Agricultural Economics and Animal Production, University of Limpopo, Private Bag X1106, Sovenga 0727, Limpopo, South Africa.
2Potchefstroom College of Agriculture, Department of Animal Production, Private Bag X1292, Potchefstroom, 2520, South Africa.
* Corresponding author:


An egg is a reproduction tool in chickens and a valuable food source for humans. The objective of this study was to examine the effect of egg weight (EW) on egg quality traits such as egg length (EL), egg diameter (ED), yolk weight (YW), albumen weight (AW), shell weight (SW), shell index (SI), yolk ratio (YR), albumen ratio (AR) and shell ratio (SR). Potchefstroom Koekoek layer genotype eggs (n = 200) were used. Pearson correlation and analysis of variance (ANOVA) were used for analysis. Correlation results indicated that egg weight had a statistical significant correlation (P < 0.05) with egg quality traits. Egg weight displayed a positive highly significant correlation with EL (0.82), AW (0.67) and SW (0.62), respectively. The findings suggest that EL, AW and SW might be used in selection to improve EW of Potchefstroom Koekoek chicken genotype. ANOVA results showed that egg weight had a statistical significant difference (P < 0.05) with egg quality traits except for albumen ratio and yolk ratio (P > 0.05).  Moreover, the findings revealed that small eggs weight had a longer egg length, yolk weight, shell weight, shell ratio and albumen weight than medium and large eggs. While large eggs had a higher egg diameter and shell index.


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Pakistan Journal of Zoology


Vol. 54, Iss. 4, Pages 1501-2001


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