title: Review: Effects of different growth rates in broiler breeder and layer hens on some productive traits.
abstract: Genetic selection that has been carried out for several dozen years has led to significant progress in poultry production by improving productive traits and increasing the profitability of broiler breeder and layer hen production. After hatching, broilers and layers differ mainly in feed intake, growth rate, efficiency of nutrient utilization, and development of muscles and adipose tissue. A key role can be played by hormonal mechanisms of appetite control in broilers and layers. The paper discusses the consequences of different growth rates resulting from long-term genetic selection on feed intake, efficiency of nutrient utilization, and development of muscles and adipose tissue, with particular consideration of the hormonal mechanisms of appetite control in broilers and layers. The information presented in this review paper shows that it would be worth comparing these issues in a meta-analysis.
authors.affiliation: Department of Animal Biochemistry and Biotechnology, UTP University of Science and Technology, Mazowiecka 28, 85-084 Bydgoszcz, Poland buzala@utp.edu.pl.
authors.forename: M
authors.initials: M
authors.lastname: Buzala
authors.affiliation: Department of Animal Biochemistry and Biotechnology, UTP University of Science and Technology, Mazowiecka 28, 85-084 Bydgoszcz, Poland.
authors.forename: B
authors.initials: B
authors.lastname: Janicki
mesh_terms: D000273:Adipose Tissue / Q000254:growth & development*; D000818:Animals; D002645:Chickens / Q000235:genetics / Q000254:growth & development / Q000502:physiology*; D004734:Energy Metabolism; D005247:Feeding Behavior; D005260:Female; D024510:Muscle Development
keywords: adipose tissue; feed intake; genetic selection; hormone; muscle