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Quantitative trait loci segregating in crosses between N ew H ampshire and W hite L eghorn chicken lines: II . Muscle weight and carcass composition
Author(s) -
Nassar M. K.,
Goraga Z. S.,
Brockmann G. A.
Publication year - 2012
Publication title -
animal genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.756
H-Index - 81
eISSN - 1365-2052
pISSN - 0268-9146
DOI - 10.1111/j.1365-2052.2012.02344.x
Subject(s) - biology , genetics
Summary In order to identify genetic factors influencing muscle weight and carcass composition in chicken, a linkage analysis was performed with 278 F 2 males of reciprocal crosses between the extremely different inbred lines N ew H ampshire (NHI) and W hite L eghorn ( WL 77). The NHI line had been selected for high meat yield and the WL 77 for low egg weight before inbreeding. Highly significant quantitative trait loci ( QTL ) controlling body weight and the weights of carcass, breast muscle, drumsticks–thighs and wings were identified on GGA 4 between 151.5 and 160.5 cM and on GGA 27 between 4 and 52 cM . These genomic regions explained 13.7–40.2% and 5.3–13.8% of the phenotypic F 2 variances of the corresponding traits respectively. Additional genome‐wide highly significant QTL for the weight of drumsticks–thighs were mapped on GGA 1, 5 and 7. Moreover, significant QTL controlling body weight were found on GGA 2 and 11. The data obtained in this study can be used for increasing the mapping resolution and subsequent gene targeting on GGA 4 and 27 by combining data with other crosses where the same QTL were found.