Poult. Sci.
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Poult Sci 2007. 86:1873-1880
© 2007 Poultry Science Association
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GENETICS

Association of Spot14{alpha} Gene Polymorphisms with Body Weight in the Chicken1

Z. P. Cao, S. Z. Wang, Q. G. Wang, Y. X. Wang and H. Li2

College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, P. R. China

2 Corresponding author: lihui{at}neau.edu.cn or lihui645{at}hotmail.com

In mammals, thyroid hormone responsive Spot14 (THRSP) is a small acidic protein that responds to thyroid hormone stimulation and, therefore, is thought to play a role in growth. The current study was designed to investigate the associations of Spot14{alpha} gene polymorphisms on chicken growth and body composition traits. The Northeast Agricultural University Resource Population (NEAURP) was used in the present study. The NEAURP was established by crossing broiler sires, derived from Northeast Agricultural University broiler lines divergently selected for abdominal fat content, with Baier layer dams, a local Chinese breed. The F1 birds were intercrossed to produce the F2 population. Body weight and body composition traits were measured in the F2 population. Polymorphisms of the gene were detected between parental lines by DNA sequencing. Primers were designed according to the chicken Spot14{alpha} gene (AY568628 [GenBank] ). The PCR-RFLP and PCR-length polymorphisms methods were then developed to genotype polymorphisms in the NEAURP. The A213C and 9 bp insertion-deletion of the Spot14{alpha} gene in the F2 population was found to be associated with BW, which implied that Spot14{alpha} gene or a tightly linked gene had an important effect on growth in the chicken.

Key Words: chicken • Spot14{alpha} gene • polymorphism • association • body weight

1 This research was supported by Program for New Century Excellent Talents in University (No. NCET-04-0343), National Basic Research Program (No. 2006CB102105), and National Natural Science Foundation Key Project (No. 30430510).






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