Genetic analysis reveals ovalbumin gene promoter variants alter egg weight and quality in White Leghorn chickens, indicating potential genetic markers for layer breeding.
An investigation was carried out on the promoter region of the ovalbumin gene to uncover genetic variations and evaluate their impact on egg quality characteristics in chickens. Single-stranded conformation polymorphism analysis, followed by sequencing, was employed to identify polymorphisms within the gene. Three distinct haplotypes were discerned across two distinct white leghorn chicken lines (IWI and IWK). These haplogroups were found to have a significant impact on egg weight by the 52nd week. Additionally, a notable correlation was observed between haplogroups and traits such as Haugh unit and albumin index, particularly within the IWK line. In summary, the partial promoter region of the ovalbumin gene demonstrated polymorphism and exerted a noteworthy influence on both the quality and quantity of eggs in layer chickens.
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Ravina et al. (2024) studied this question.
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