الملخص الإنجليزي
A total of 320 twenty week-old slow and rapid feathering Saudi Arabian Baladi pullets were used to assess the effect of sex-linked feathering genes on body weight, age at sexual maturity, feed intake and subsequent laying performance. Similar numbers of rapid feathering Leghorns pullets were included in the study for the purpose of comparison. The experimental birds of each genotypic group were randomly divided into four replicates and subjected to standard management practices. Slow feathering Baladi pullets had higher (P<0.05) adult body weight, rate of mortality, and feed intake and a similar age at sexual maturity but showed lower (P<0.05) hen-day, and hen-housed egg production and feed conversion compared with rapid teathering Baladi pullets. Rapid feathering Leghorns had higher (P<0.05) adult body weight, age at sexual maturity, hen-day egg production, rate of mortality and feed intake and lower feed intake/kg eggs than rapid and slow feathering Baladi. However, tapid feathering Baladi and Leghorns had similar hen-housed egg production and feed intake per dozen eggs and had better (P<0.05) performance than slow feathering Baladi.
