Genetic effects of aging on fitness and nonfitness traits in laying hens housed three per cage

Autor: Mônica Corrêa Ledur, L E Liljedahl, L Asselstine, Ian McMillan, R. W. Fairfull

Publikováno v: Poultry Science. 82:1223-1234

Three White Leghorn strains, their two-way crosses, and two commercial lines were used to study the effects of aging on several parameters related to performance of fitness and nonfitness traits during the first laying cycle of hens housed three per

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::738713e413eafe1d78159a06daab2ac9
https://doi.org/10.1093/ps/82.8.1223

Age-regulated expression of genetic and environmental variation in fitness traits. 2. Genetic effects and variances for viability among crosses from a factorial mating of six selected Leghorn strains

Autor: R. W. Fairfull, L. E. Liljedahl, R. S. Gowe

Publikováno v: Canadian Journal of Animal Science. 79:269-276

White Leghorn strains were crossed reciprocally in a complete factorial mating producing 6 pure strains and 30 strain-crosses, which were kept for two laying cycles: 133–496 d of age and 547–909 d. Hens were housed for lay individually in four tw

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c6010f04a2f3d06c7756b3814f8371c5
https://doi.org/10.4141/a97-104

A genetic evaluation of male reproductive fitness at early and late age in Drosophila melanogaster treated with a mutagen

Autor: L. E. Liljedahl, G. Engström, T. Björklund

Publikováno v: Genetics Selection Evolution, Vol 25, Iss 5, Pp 421-434 (1993)
Genetics Selection Evolution
Genetics Selection Evolution, BioMed Central, 1993, 25 (5), pp.421-434
Genetics, Selection, Evolution : GSE

Summary - The effect of ethyl methane sulfonate-induced mutations in different germ cell stages on male reproductive fitness at early and late age, compared to an untreated control, was investigated in a laboratory population of Drosophila melanogast

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ecfca15ee040eda692a539338c75f1d0
http://www.gsejournal.org/content/25/5/421

Expression of genetic and environmental variation during ageing : 2. Selection for increased lifespan in Drosophila melanogaster

Autor: G. Engström, L. E. Liljedahl, T. Björklund

Publikováno v: TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik. 85(1)

A selection experiment with Drosophila melanogaster was carried out to test some theories of ageing by calculating genetic parameters for a reproductive fitness trait at different ages. Successful selection for increased lifespan showed that longevit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a291cf76b08e22bee079cdbb3979b6d
https://pubmed.ncbi.nlm.nih.gov/24197225

Age changes in genetic and environmental variation in laying hens

Autor: R. S. Gowe, R. W. Fairfull, J. S. Gavora, L. E. Liljedahl

Publikováno v: TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik. 67(5)

Effects of age on the genetic and environmental variation of egg production, egg weight and egg quality were investigated in two populations of laying hens. The first part of the study was based on data from a crossbred population in Sweden that allo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a908e59f7814edd12626e33c42c47078
https://pubmed.ncbi.nlm.nih.gov/24258757