Mapping of quantitative trait loci affecting quality and production traits in egg layers
| Autor: | Asko Mäki-Tanila, Johanna Vilkki, Nina Schulman, Maria Tuiskula-Haavisto, Mervi Honkatukia, Dirk-Jan de Koning |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: |
Quality Control
Genotype Eggs Oviposition Population Quantitative Trait Loci mareks-disease lines Biology Quantitative trait locus Animal Breeding and Genomics resistance Eating Egg Shell Egg White Genetic linkage body-weight Animals Fokkerij en Genomica Eggshell education Genetics education.field_of_study affecting susceptibility Body Weight association hormone receptor gene Chromosome Mapping General Medicine chicken genome linkage map Chromosome 4 growth-hormone Microchromosome WIAS Microsatellite Animal Science and Zoology Female Chickens Egg white |
| Zdroj: | Poultry Science 81 (2002) 7 Scopus-Elsevier Poultry Science, 81(7), 919-927 |
| ISSN: | 0032-5791 |
| DOI: | 10.1093/ps/81.7.919 |
| Popis: | A mapping population segregating for egg quality traits was created by a line cross between two egg layer lines and screened by a genome scan. The F2 generation consisted of 307 hens, which were scored for egg quality and production traits. The mapping population was genotyped for 99 microsatellite loci, spanning nine macrochromosomes and five small linkage groups. The linkage maps were used in mapping QTL affecting 14 traits, by using multiple markers and a least-squares approach. We detected 14 genomewide significant and six suggestive QTL that were located on chromosomes 2, 3, 4, 5, and, 8 and sex chromosome Z. A significant QTL affecting egg white thinning was found on chromosome 2. For eggshell strength, a significant QTL was found on chromosome Z. For production traits, the most interesting area was on chromosome 4, where highly significant QTL effects were detected for BW, egg weight, and feed intake in the same area. The most significant QTL explains 25.8% of the phenotypic variance in F2 of body weight. An area affecting the age at first egg, egg weight, and the number of eggs was located on chromosome Z. |
| Databáze: | OpenAIRE |
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