Response to selection for time interval between ovipositions in the hen

Area of Science:

• Animal Science
• Genetics
• Poultry Science

Background:

• Understanding the genetic basis of reproductive traits in poultry is crucial for improving egg production efficiency.
• Selection for specific traits can have correlated effects on other important production characteristics.

Purpose of the Study:

• To investigate the effects of selecting for a reduced oviposition time interval in Single Comb White Leghorns.
• To evaluate the correlated responses in egg production, body weight, and egg quality traits.

Main Methods:

• Seven generations of selection for reduced oviposition time interval.
• Random mating with restrictions against full or half-sib matings.
• Measurement of oviposition time, total egg number, body weight, age at first egg, egg weight, and rate of lay.

Main Results:

• A 4.8% reduction in oviposition time interval was achieved.
• No significant changes were observed in total egg number, body weight, or age at first egg.
• Egg weight declined by 5%, while the rate of lay showed a slight increase (P < 0.07).

Conclusions:

• Selection for reduced oviposition time interval is feasible and heritable.
• Correlated responses indicate a complex genetic relationship between oviposition time and other production traits.
• Further research can optimize selection strategies for improved poultry breeding programs.