Fatness QTL on chicken chromosome 5 and interaction with sex.

Genetics, Selection, Evolution : GSE
B AbashtMadeleine Douaire

Abstract

Quantitative trait loci (QTL) affecting fatness in male chickens were previously identified on chromosome 5 (GGA5) in a three-generation design derived from two experimental chicken lines divergently selected for abdominal fat weight. A new design, established from the same pure lines, produced 407 F2 progenies (males and females) from 4 F1-sire families. Body weight and abdominal fat were measured on the F2 at 9 wk of age. In each sire family, selective genotyping was carried out for 48 extreme individuals for abdominal fat using seven microsatellite markers from GGA5. QTL analyses confirmed the presence of QTL for fatness on GGA5 and identified a QTL by sex interaction. By crossing one F1 sire heterozygous at the QTL with lean line dams, three recombinant backcross 1 (BC1) males were produced and their QTL genotypes were assessed in backcross 2 (BC2) progenies. These results confirmed the QTL by sex interaction identified in the F2 generation and they allow mapping of the female QTL to less than 8 Mb at the distal part of the GGA5. They also indicate that fat QTL alleles were segregating in both fat and lean lines.

Citations

Feb 1, 2011·BMC Genetics·Hai-Ming XuXiang-Yang Lou
Dec 4, 2009·BMC Genomics·Guillaume Le MignonSandrine Lagarrigue
Dec 1, 2006·Poultry Science·B AbashtS J Lamont
Feb 20, 2014·Genetics Research International·Ann Bohannon-StewartXiaofei Wang
Feb 26, 2013·Animal : an International Journal of Animal Bioscience·E Baéza, E Le Bihan-Duval
Oct 1, 2009·BMB Reports·Xiaofei WangLarry A Cogburn
Jan 8, 2019·Animal : an International Journal of Animal Bioscience·J C FaveriM C Ledur

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