ORIGINAL PAPER
Polymorphism of intronic microsatellites in the
A-FABP and LEPR genes and its association with
productive traits in the pig
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1
Department of Animal Genetics and Breeding, August Cieszkowski Agricultural University,
Wołyńska 33, Poznań 60-637, Poland
2
Experimental Station,
60-637 Pawłowice, Poland
3
National Research Institute of Animal Production,
32-083 Balice, Poland
Publication date: 2004-10-25
Corresponding author
M. Świtoński
Department of Animal Genetics and Breeding, August Cieszkowski Agricultural University,
Wołyńska 33, Poznań 60-637, Poland
J. Anim. Feed Sci. 2004;13(4):615-624
KEYWORDS
ABSTRACT
The adipocyte fatty acid-binding protein (A-FABP) and leptin receptor (LEPR) genes are
candidate quantitative trait loci (QTLs) for fatness traits in the pig. In both genes polymorphic short
tandem repeat (STR) sequences in intron 1 (A-FABP) and in intron 3 (LEPR) were revealed. The
association studies between both polymorphisms and productive traits were performed in two breeds
(Polish Large White and Polish Landrace) and one synthetic line (L990) of the pig. In the A-FABP
ten and in the LEPR gene eight alleles were identified, and the polymorphic information content
(PIC) values ranged from 0.713 to 0.749 and from 0.441 to 0.557, respectively. The associations
with backfat thickness and intramuscular fat content were found. Since the observed relationships
considering each gene were not concordant in all the studied populations, it was concluded that both
genes are linked with an unknown QTL.
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