Quantitative trait loci associated with body weight and abdominal fat traits on chicken chromosomes 3, 5 and 7

Genetics and Molecular Research : GMR
S Z WangH Li

Abstract

Body weight and abdominal fat traits in meat-type chickens are complex and economically important factors. Our objective was to identify quantitative trait loci (QTL) responsible for body weight and abdominal fat traits in broiler chickens. The Northeast Agricultural University Resource Population (NEAURP) is a cross between broiler sires and Baier layer dams. We measured body weight and abdominal fat traits in the F(2) population. A total of 362 F(2) individuals derived from four F(1) families and their parents and F(0) birds were genotyped using 29 fluorescent microsatellite markers located on chromosomes 3, 5 and 7. Linkage maps for the three chromosomes were constructed and interval mapping was performed to identify putative QTLs. Nine QTL for body weight were identified at the 5% genome-wide level, while 15 QTL were identified at the 5% chromosome-wide level. Phenotypic variance explained by these QTL varied from 2.95 to 6.03%. In particular, a QTL region spanning 31 cM, associated with body weight at 1 to 12 weeks of age and carcass weight at 12 weeks of age, was first identified on chromosome 5. Three QTLs for the abdominal fat traits were identified at the 5% chromosome-wide level. These QTLs explained 3.42 to 3.59% of ...Continue Reading

References

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Citations

Mar 5, 2016·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·L LengH Li
Jul 23, 2014·Asian-Australasian Journal of Animal Sciences·A M Fouad, H K El-Senousey
Jan 7, 2016·Asian-Australasian Journal of Animal Sciences·Muhammad CahyadiJun-Heon Lee
Oct 19, 2016·Molecular Biology Reports·M IranmaneshDong-Dong Wu

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