Abstract

Background:
Pleomorphic adenoma gene 1 (PLAG1) is a zinc finger transcription factor and widely known to play an important role in regulating growth traits in bovine.

Aim:
This study aimed to evaluate the association of PLAG1 polymorphisms with body weight and measurement traits of Brahman cattle.

Methods:
A total of 57 blood samples of Brahman cattle and their body weight and measurement traits have been collected. Moreover, the PCR-RFLP method was used to determine the genotypes of the three polymorphisms in PLAG1, namely g.48308C>T, g.32212 (19 bp indel), and g.45233 T>C. A mix model effect was performed to evaluate the association of PLAG1 with body weight and measurement traits, while Tukey HSD test was used to compare the means among genotypes.

Results:
Genotype variations were observed for the g.48308C>T SNP and 19 bp indel. In details, the CC and CT genotypes of g.48308C>T SNP were identified and all possible genotypes of 19 bp indel were also identified. On the other hand, g.45233T>C SNP showed no variation. The statistical analysis revealed that SNP g.48308C>T and 19 bp indel had a significant effect on body weight and chest girth (PT SNP and DD genotype of 19 bp indel of the PLAG1 were favorable for those two traits.

Conclusion:
Based on these results, the SNP g.48308C>T and 19 bp indel in the PLAG1 could be as candidate marker for body weight and chest girth in Brahman cattle population at the Center for Superior Animal Breeding and Forage (BPTU-HPT) Sembawa.

Key words: Association study, Body weight, Brahman cattle, Chest girth, PLAG1 variations