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Timely Topic Archive
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Longevity Attributes of Bos indicus x Bos taurus Crossbred Cows
F.A. Thrift and T.A. Thrift, Universities of Kentucky and Florida, respectively, recently published an excellent research review of the attributes of Bos indicus (Brahman) x Bos Taurus (European) crossbred cows.
Author: Dr. Rick Rasby, Professor of Animal Science
Date published: Feb-10-04
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Reproductive Tract Injuries That Can Occur in Bulls
In order to be a successful breeder, a bull must produce adequate amounts of fertile semen and must be able to deliver that semen to the reproductive tracts of cows.
Author: Dr. Rick Rasby, Professor of Animal Science
Date published: Apr-15-04
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Sire Milk EPDs Were Closely Related to Production of Their Daughters
Oklahoma State Univ. researchers conducted a long-term study to evaluate the productivity of daughters of highly proven high and low Milk EPD Angus and Hereford sires.
Author: Dr. Rick Rasby, Professor of Animal Science
Date published: Jun-24-04
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Factors Affecting Beef Cow Longevity
Washington State Univ. and USDA researchers used a statistical method, “survival analysis techniques,” to identify factors affecting the longevity of beef females.
Author: Dr. Rick Rasby, Professor of Animal Science
Date published: Aug-13-04
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Effect of Time of Insemination on Pregnancy Rate of Beef Heifers
Research has shown that ovulation in beef females occurs at an average of 31±1 hours after the onset of estrus (range of 22 to 43 hours).
Author: Dr. Rick Rasby, Professor of Animal Science
Date published: Sep-03-04
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THE IMPACT OF CONVENIENCE TRAITS
Convenience traits are those cattle traits that contribute directly to savings in time, facilities, drugs and labor in a cow-calf enterprise.
Author: Dr. Rick Rasby, Professor of Animal Science
Date published: Oct-04-04
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The Teeth Have It...Kind Of
Even with an effective ID system in place, the U.S. may or may not find it easy to quickly and effectively determine animal age thresholds.
Author: Dr. Rick Rasby, Professor of Animal Science
Date published: Oct-25-04
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Single-Trait Selection for Increased Scrotal May Increase Mature Size
In 1995, in an effort to improve reproductive performance, a decision was made by Montana State Univ. scientists to begin selection for scrotal circumference (SC) in a herd of inbred Hereford cattle at the Northern Agricultural Research Center, Havre, Montana.
Author: Dr. Rick Rasby, Professor of Animal Science
Date published: Oct-28-04
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Relationship of Teat and Udder Scores With Cow Milk Production and Calf Growth Traits
Some beef breed associations provide a scoring system for the evaluation of teat size and udder suspension in cows. However, the relationship of teat and udder scores with milk production and calf growth is not clear.
Author: Dr. Rick Rasby, Professor of Animal Science
Date published: Nov-03-04
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Certain Carcass and Calving Traits Were Genetically Antagonistic
Previous research has shown that certain carcass traits are genetically correlated, both favorably and unfavorably, with calving traits.
Author: Dr. Rick Rasby, Professor of Animal Science
Date published: Nov-04-04
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