| Onset of puberty in heifers of diverse beef breeds and crosses. | |
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MedLine Citation:
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PMID: 7174548 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Puberty traits of straightbred and crossbred heifers (n = 301) were evaluated under pasture conditions. Breed groups represented were straightbred Hereford and Red Poll, reciprocal crosses of these two breeds, Angus X Hereford, Angus X Charolais-Cross, Brahman X Hereford and Brahman X Angus. Breed group was an important (P less than .01) source of variation in heifer weights and in age at puberty. Straight-bred Red Poll and Red Poll cross heifers were youngest at puberty, Angus X Hereford and Angus X Charolais-Cross were intermediate, and straightbred Hereford and Brahman crosses were oldest at the onset of puberty. At the beginning of their first mating season at 19.5 mo of age, 96% of the straightbred Red Polls, 95% of Red Poll crosses, 81% of Angus X Herefords, 89% of Angus X Charolais-Crosses, 68% of straightbred Herefords, 48% of Brahman X Herefords and 74% of the Brahman X Angus had attained puberty. Results of a diallel analysis of Hereford-Red Pool matings indicated that maternal influence of the Red Poll breed was superior (P less than .01) to Herefords for body weight up to 24 mo of age and incidence of puberty at 11.5 mo. Red Polls also exceeded Herefords in direct effects for puberty percentage at 11.5, 15 and 19.5 mo of age. Heterosis was significant for puberty percentage and weight. Breed group differences in pregnancy rate at 24 mo were not significantly. |
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Authors:
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J S Dow; J D Moore; C M Bailey; W D Foote |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of animal science Volume: 55 ISSN: 0021-8812 ISO Abbreviation: J. Anim. Sci. Publication Date: 1982 Nov |
Date Detail:
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Created Date: 1983-02-14 Completed Date: 1983-02-14 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8003002 Medline TA: J Anim Sci Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1041-7 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Body Weight Cattle / genetics*, physiology Crosses, Genetic Female Sexual Behavior, Animal Sexual Maturation* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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