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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Sales, M. A. Larson, M. J. Reiter, S. T. Brown, A. H. Brown, M. A. Looper, M. L. Coffey, K. P. Rosenkrans, C. F. |
| Description | Country affiliation: United States Author Affiliation: Sales MA ( Department of Animal Science, University of Arkansas, Fayetteville, AR, USA.) |
| Abstract | Relating single-nucleotide polymorphisms (SNP) to cows with acceptable productivity could benefit cattle breeders in areas where tall fescue is the predominant forage. This study aimed to (i) identify SNPs in bovine cytochrome P450 3A28 (CYP3A28) and (ii) determine the associations between SNP genotype, forage and cow body condition (BC). Genotype (CC, CG or GG) and forage [Kentucky-31 wild-type endophyte-infected tall fescue (KY+) vs. bermudagrass] effects on milk volume and quality were determined in Herd 1 cows (123 cows); in Herd 2 (99 cows), genotype and BC (low vs. moderate) effects on ovarian follicle size, calving date and calving per cent were determined; and in Herd 3 (114 cows), effects of genotype and fescue cultivar [KY+ vs. non-toxic endophyte-infected tall fescue (HiMag4)] were related to calving per cent, calving date and weaning weights of both cow and her calf. A cytosine (C) to guanine (G) transversion at base 994 (C994G) in CYP3A28 was identified. There was a genotype × forage type interaction (p < 0.05) on milk protein in Herd 1 cows; CC cows grazing bermudagrass had greater milk protein percentage in relation to other cows in the herd. In Herd 2, BC and genotype × BC tended (p < 0.10) to influence follicle size and Julian calving date respectively. Diameter of the largest follicle tended to be larger in moderate BC than in low-BC cows; whereas, CC and CG cows in moderate BC and homozygous (CC and GG) cows in low BC tended to calve 14 days earlier in relation to CG cows in low BC. In Herd 3, there was a genotype × forage type interaction (p < 0.05) on calving per cent, Julian calving date and calf weaning weight. In this study, genetic alterations (G allele at C994G) coupled with nutritional factors (low BC and toxic tall fescue) resulted in overall lower productivity in cows. |
| File Format | HTM / HTML |
| ISSN | 09312439 |
| Issue Number | 4 |
| Volume Number | 96 |
| e-ISSN | 14390396 |
| Journal | Journal of Animal Physiology and Animal Nutrition |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2012-08-01 |
| Publisher Place | Germany |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Physiology Discipline Veterinary Medicine Discipline Nutritional Sciences Animal Feed Analysis Cattle Physiology Cytochrome P-450 Enzyme System Genetics Diet Veterinary Poaceae Classification Polymorphism, Single Nucleotide Amino Acid Sequence Animals Body Composition Metabolism Female Gene Expression Regulation, Enzymologic Genotype Lactation Milk Chemistry Standards Milk Proteins Ovarian Follicle Pregnancy Time Factors Journal Article Randomized Controlled Trial Research Support, U.s. Gov't, Non-p.h.s. |
| Content Type | Text |
| Resource Type | Article |
| Subject | Animal Science and Zoology Food Animals |
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