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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
4
|
| pubmed:dateCreated |
1980-8-15
|
| pubmed:abstractText |
182 calves, mostly Angus but also of Hereford and Shorthorn breeding, born in the University herd, were studied, including 55, born during Spring 1970, genotypically distributed as 8 mm, 33 m+ and 14 ++. Eighteen of the 24 homozygotes (mm) had the typical double-muscled conformation at birth (mmY); in the remainder, the typical bulging muscles usually manifested themselves within one month after birth. Averaged over sexes, mmY calves were 4.4 kg heavier (P less than 0.05) than the Angus (++) breed average of 26.6 kg. Compared within-sires, mmY calves were 4.0 kg heavier than m+. Heterozygotes (m+) were 0.4 kg heavier than the normal (++) average. Estimating differences between mm, m+ and ++ for post-natal traits was confined to the 1970 calves because experimental conditions were controlled. Double-muscled (mm) calves had a higher (+7%) 180-day weight compared with normal (++) calves. After weaning at approximately 180 days, until yearling age, bulls and heifers received diets with roughage:concentrate ratios of 75:25 and 70:30, respectively. The post-weaning growth rate of mm calves was depressed (-17%) due to a reduced (-11%) feed intake compared with non-mm controls. Homozygotes had a lower (-4%) liveweight at 365 days, compared with ++ animals. Least squares estimates of the difference (m+ - ++) at birth, 180 days and 365 days were -1.0 +/- 1.0 kg, +7.3 +/- 4.5 kg and +7.3 +/- 6.3 kg, respectively.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:status |
MEDLINE
|
| pubmed:month |
Dec
|
| pubmed:issn |
0017-4793
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| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
43
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
221-34
|
| pubmed:dateRevised |
2008-11-21
|
| pubmed:meshHeading |
pubmed-meshheading:546687-Animal Nutritional Physiological Phenomena,
pubmed-meshheading:546687-Animals,
pubmed-meshheading:546687-Birth Weight,
pubmed-meshheading:546687-Body Weight,
pubmed-meshheading:546687-Cattle,
pubmed-meshheading:546687-Cattle Diseases,
pubmed-meshheading:546687-Genes, Dominant,
pubmed-meshheading:546687-Growth,
pubmed-meshheading:546687-Hypertrophy,
pubmed-meshheading:546687-Muscles,
pubmed-meshheading:546687-Muscular Diseases
|
| pubmed:year |
1979
|
| pubmed:articleTitle |
Effects of the m gene for muscular hypertrophy on birth weight and growth to one year of age in beef cattle.
|
| pubmed:publicationType |
Journal Article
|