Mapping QTLs on chicken chromosome 1 for performance and carcass traits in a broiler x layer cross
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Data
2006-04-01
Autores
Nones, K.
Ledur, M. C.
Ruy, D. C.
Baron, E. E.
Melo, CMR
Moura, ASAMT
Zanella, E. L.
Burt, D. W.
Coutinho, L. L.
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Editor
Blackwell Publishing
Resumo
With the objective of mapping quantitative trait loci (QTLs) for performance and carcass traits, an F-2 chicken population was developed by crossing broiler and layer lines. A total of 2063 F-2 chicks in 21 full-sib families were reared as broilers and slaughtered at 42 days of age. Seventeen performance and carcass traits were measured. Parental (F-0) and F-1 individuals were genotyped with 80 microsatellites from chicken chromosome 1 to select informative markers. Thirty-three informative markers were used for selective genotyping of F-2 individuals with extreme phenotypes for body weight at 42 days of age (BW42). Based on the regions identified by selective genotyping, seven full-sib families (649 F-2 chicks) were genotyped with 26 markers. Quantitative trait loci affecting body weight, feed intake, carcass weight, drums and thighs weight and abdominal fat weight were mapped to regions already identified in other populations. Quantitative trait loci for weights of gizzard, liver, lungs, heart and feet, as well as length of intestine, not previously described in the literature were mapped on chromosome 1. This F-2 population can be used to identify novel QTLs and constitutes a new resource for studies of genes related to growth and carcass traits in poultry.
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abdominal fat, carcass, growth, organs, quantitative trait loci, selective genotyping
Como citar
Animal Genetics. Oxford: Blackwell Publishing, v. 37, n. 2, p. 95-100, 2006.