Document Detail


Genotype x environment interactions in Angus, Brahman, and reciprocal cross cows and their calves grazing common bermudagrass and endophyte-infected tall fescue pastures.
MedLine Citation:
PMID:  9110202     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Reproductive and preweaning data on 233 Angus (A), Brahman (B), and reciprocal-cross cows (AB, BA) and 455 two- and three-breed cross calves managed on common bermudagrass or endophyte-infected tall fescue were used to evaluate the interaction of forage type with individual and maternal heterosis and maternal and grandmaternal breed effects. Cows were born from 1988 to 1991 and calves from 15 Polled Hereford sires were born from 1991 to 1994. Heterosis for calving rate was similar and important on both forages (P < .01), but maternal effects were small on each forage. Maternal heterosis for birth weight differed between common bermudagrass and tall fescue (P < .10) and grandmaternal effects were evident on bermudagrass (P < .05) but not tall fescue. Forage effects were generally substantial for 205-d weight, weaning hip height, and weaning weight:height ratio (P < .01), and maternal heterosis for these traits was larger on tall fescue than on common bermudagrass (P < .01). Grandmaternal effects were in favor of Angus for 205-d weight, hip height, and weight:height ratio on common bermudagrass (P < .05) but not on tall fescue. Heterosis for 205-d weight per cow exposed was substantial on both forages (P < .01) and was numerically larger on tall fescue than on bermudagrass, but maternal effects were not significant. These results suggest more advantage for Brahman-cross cows over purebreds on endophyte-infected tall fescue than a similar comparison on common bermudagrass. They also suggest an advantage for Angus in grandmaternal effects on bermudagrass but not tall fescue.
Authors:
M A Brown; A H Brown; W G Jackson; J R Miesner
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of animal science     Volume:  75     ISSN:  0021-8812     ISO Abbreviation:  J. Anim. Sci.     Publication Date:  1997 Apr 
Date Detail:
Created Date:  1997-06-27     Completed Date:  1997-06-27     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8003002     Medline TA:  J Anim Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  920-5     Citation Subset:  IM    
Affiliation:
USDA, ARS, South Central Family Farm Research Center, Booneville, AR 72927, USA.
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MeSH Terms
Descriptor/Qualifier:
Animals
Birth Weight / physiology
Body Constitution / physiology
Body Weight / physiology
Breeding*
Cattle / genetics*,  physiology
Claviceps / isolation & purification,  physiology*
Diet / veterinary*
Environment*
Female
Genotype
Hybrid Vigor / physiology
Linear Models
Male
Poaceae / microbiology*
Statistics as Topic

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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