GENETIC DETERMINISM OF THE REPRODUCTION TRAITS IN A PLYMOUTH ROCK LINE

Abstract

The heritability of the studied traits was below 0.2 in four traits (age at first egg, body weight, eggs produced during the control period, laying percentage during the control period); only egg weight having a higher heritability, 0.698. There are tight positive phenotypic, genotypic and environmental correlations between the egg number and the laying percentage and tight negative correlations between the age at first egg and the egg number and between the age at first egg and the laying percentage.

Keywords

• genetic determinism
• reproduction traits
• layers