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Bovine growth hormone gene polymorphism affects stress response in J apanese B lack cattle
Author(s) -
Tachi Noriko,
Tanaka Sigefumi,
Ardiyanti Astrid,
Katoh Kazuo,
Sato Shusuke
Publication year - 2014
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1111/asj.12212
Subject(s) - haplotype , polymorphism (computer science) , biology , basal (medicine) , hormone , gene , genetics , endocrinology , medicine , genotype , insulin
We investigate the associations between growth hormone ( GH ) gene polymorphism and behavioral and physiological responses to stressors and learning ability in J apanese B lack cattle. Flight distance test was conducted in the first experiment. Steers with haplotype C of GH gene polymorphism avoided human approaches at a significantly greater distance than ones without haplotype C ( C : 1.9 ± 0.9, non‐ C : 1.0 ± 0.2 m, P < 0.05). An open‐field test was conducted in the second experiment. Behavioral responses did not differ significantly between steers with and without haplotype C . Increases of heart rates to dropping of iron pipes was significantly higher in steers with haplotype C ( C :161.7 ± 21.8, non‐ C :130.7 ± 31.3%, P < 0.05). Despite basal serum concentrations not being different between steers with and without haplotype C , serum cortisol in blood sampling immediately after severe confinement in a race tended to be higher in steers with haplotype C ( P = 0.1). The maze test was conducted as the third experiment. There was no difference in performance in the maze test between steers with and without haplotype C . It is concluded that genetic polymorphism of GH may affect stress responses through GH concentration in steers.