Differential physiological response of slow- and fast-growing broiler lines to hypoxic conditions during chorioallantoic membrane development.

ABSTRACT: Ambient conditions during chicken embryogenesis, such as insufficient oxygen or changes in temperature, are expected to cause permanent phenotypic changes and affect their posthatch performance. Decades of genetic selection for high growth rate resulted with various physiological and morphological changes that can affect the broiler fitness under environmental stress. To evaluate the selection effect on responses to environmental challenge during embryonic development, and the long-term implications, we have used a unique genetic line, that was not selected for over 30 yr (since 1986), as control for the modern commercial genetic line. At embryonic day 5 (E5), broiler embryos from these 2 genetic lines were divided into 2 treatments: 1) control; 2) 15% O₂ concentration for 12 h/

SUBMITTER: Ben-Gigi R 

PROVIDER: S-EPMC7858093 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature