Summary
This study evaluates how different commercial laying genotypes perform under free-range conditions during the early-to-mid production period (21–44 weeks), assessing both biological productivity and economic efficiency. The research likely identifies genotype-specific variation in egg quality parameters and cost of production, offering practical guidance for producers selecting breeds suited to extensive systems. Findings are expected to contribute to the evidence base on matching genotype to system type for optimised welfare, quality, and economic outcomes.
UK applicability
Although conducted in Turkey, the findings are broadly applicable to UK free-range egg producers, who also face decisions around genotype selection within the context of welfare standards and market quality requirements. UK producers operating under the British Lion Code or RSPCA Assured standards may find comparative genotype performance data useful, though climatic and husbandry differences should be considered when extrapolating results.
Key measures
Lay rate (%); egg weight (g); feed conversion ratio; egg mass (g/hen/day); Haugh unit score; shell thickness (mm); yolk colour; egg production cost per unit
Outcomes reported
The study measured productive performance, egg quality traits, and economic cost per egg across multiple laying hen genotypes kept in a free-range system from 21 to 44 weeks of age. It likely compared genotypes on metrics including lay rate, egg weight, shell quality, interior quality indices, and feed conversion efficiency.
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