Author: Charles Elmer MaysPublisher:
ISBN:
Category : Cattle
Languages : en
Pages : 116
Book Description
Effects of Endophyte-infected Fescue and FEB-200 on Reproductive Performance of Beef Bulls
Author: Charles Elmer MaysPublisher:
ISBN:
Category : Cattle
Languages : en
Pages : 116
Book Description
Effect of Removal Time from Endophyte Infected Fescue on Reproductive Performance in Mares
Author: Wendy TaylorEffects of the Consumption of Endophyte Infected KY-31 Fescue Hay on the Reproductive Parameters of the Growing Holstein Bull
Author: Kathryn Louise EvansPublisher:
ISBN:
Category : Dairy cattle
Languages : en
Pages : 160
Book Description
Association of Genotype at DRD2 with Growth and Reproductive Performance Traits in Bulls Grazing Toxic Endophyte-infected Tall Fescue
Author: Kaysie JenningsPublisher:
ISBN:
Category :
Languages : en
Pages : 69
Book Description
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. The objective of this study was to examine the DRD2 SNP for genotype-phenotype associations in bulls grazing either TE tall fescue or non-toxic endophyte-infected (NTE) tall fescue. Bulls remained on their respective pasture treatments from February through mid-June. Statistical analysis focused solely on the months of April and May. Urine samples, semen samples, body weights (BW), scrotal circumferences (SC), and body condition scores were collected. Bulls were genotyped using a bovine Taqman genotyping assay (Applied Biosystems, Foster City, CA). Genotype at DRD2 was associated with weight gain such that GG bulls gained less weight than AA or AG bulls regardless of pasture type (P=0.0055). Bulls on TE tall fescue gained more weight than bulls on NTE tall fescue (P=0.0433). Genotype at DRD2 was associated with SC such that AA and GG bulls had a greater SC than AG bulls (P=0.0033). A trend was also observed between scrotal circumference and treatment (P=0.0768) with bulls grazing NTE tall fescue tending to have a smaller scrotal circumference than bulls grazing TE tall fescue. Urine ergot alkaloid concentrations were greater for bulls on TE tall fescue (P
Effects of Feeding Endophyte-infected Tall Fescue Seed on Beef Cattle Performance, Hepatic Enzyme Activity, Lipid Oxidation, Metmyoglobin Reductase Activity, and Mitochondrial Lipid Composition
Author: Brandon Jermaine McClentonPublisher:
ISBN:
Category :
Languages : en
Pages : 98
Book Description
The objective of this study was to determine the effects of feeding endophyte-infected tall fescue seed to Angus steers on average daily gain, carcass characteristics, ergovaline concentration, lipid oxidation, hepatic enzyme activity, metmyoglobin reductase activity, and mitochondrial lipid composition. Animals were blocked into light, medium, and heavy body weight groups and were randomly assigned to either a KY31 seed treatment (6796 ppb ergovaline; 20 μg/kg BW; E+; n = 6) or a KY32 control ( 100 ppb; E-; n = 6). There was a 2- way treatment × time interaction effect on ADG (P
Evaluation of the Effects of Endophyte-Infected Tall Fescue Consumption on the Pulmonary Arterial Pressure of Beef Cattle
Author: Edwin Benjamin Rajo GomezPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
A Comparison of the Management Strategies Used to Mitigate Or Alleviate the Effects of Endophyte-infected Tall Fescue on Beef Cattle Performance
Author: Jamie HawleyPublisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 206
Book Description
Beef Steer Performance as Affected by Endophyte-infected Tall Fescue
Author: Trevyr Reyn BedingfieldPublisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 96
Book Description
Influence of Endophyte-infected Tall Fescue Seed Consumption on Reproductive Performance in the Mare
Author: Carrie Layne SharpImpacts of Endophyte Infected Fescue on Cow Calf Production and Evaluation of Grazing Pressures on Endophyte Free Fescue Pastures
Author: Bolaji AremuPublisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 442
Book Description