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Association Of Genotype At Drd2 With Growth And Reproductive Performance Traits In Bulls Grazing Toxic Endophyte-Infected Tall Fescue, Kaysie Jennings
Association Of Genotype At Drd2 With Growth And Reproductive Performance Traits In Bulls Grazing Toxic Endophyte-Infected Tall Fescue, Kaysie Jennings
Masters Theses
Fescue toxicosis can negatively impact growth and fertility of beef cattle grazing tall fescue infected with an endophytic fungus. The fungus produces ergot alkaloids that contribute to the hardiness of the plant, but can be detrimental to the animal if consumed. A single nucleotide polymorphism (SNP) in the dopamine receptor D2 gene (DRD2) has been associated with serum prolactin concentrations and hair coat scores in cattle grazing toxic endophyte-infected (TE) tall fescue; cattle with the GG genotype had decreased serum prolactin concentrations and increased hair coat scores. Separately, heifers with the AA genotype calved sooner than AG or GG heifers. …