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United States Department of Agriculture

Agricultural Research Service

Research Project: DEVELOPMENT AND ASSESSMENT OF A SYSTEM TO PRODUCE GRASS-FED BEEF FOR THE SOUTHERN GREAT PLAINS

Location: Forage and Livestock Production Unit

Title: Breed group effects for chute exit velocity as an indicator trait for temperament in weaner cattle

Authors
item Thomas, L -
item Brown, Hayden -
item Johnson, B -
item Coleman, Samuel
item Elzo, Mauricio -
item Derouen, Sidney -
item Franke, Don -
item Wyatt, Wayne -
item Vann, Rhonds -
item Hansen, Gary -

Submitted to: Journal of Animal Science
Publication Type: Abstract Only
Publication Acceptance Date: April 1, 2012
Publication Date: N/A

Interpretive Summary: Abstract only

Technical Abstract: The objective of this study was to determine breed group differences in chute exit velocity (CEV) in weaner cattle (n=3176). Data were collected in 2004 through 2008 under procedures of objective 3, Southern Regional Research project S1013 with the following states contributing data: FL, LA, and MS. Chute exit velocity was the time required for a calf to traverse 1.8 m when released from the working chute. Chute exit velocity was calculated as (velocity = distance (m)/time (s)). Included were Angus (A), Braford (BF), Brangus (BN), Brahman (B), Charolais (C), Hereford (H), Romosinuano (R), Commercial (X) and 2-and 3-way crosses of these groups. Data were analyzed by location with ANOVA and a model with terms for an overall mean, year, breed, calf gender where applicable, calf age, dam age, and error. Calf age and dam age were covariates. At Brooksville, FL, CEV did not differ (P = 0.42) among breed types involving A, B, and R breeds. At Marianna, FL, breed group affected (P < 0.10) mean CES; A was similar (P > 0.05) to CA, CBN, BN and AB; B was similar (P > 0.05) to ABN, AB, BN, CBN, and CA. At Baton Rouge, LA, mean CEV was affected (P < 0.01) and B had greater (P < 0.05) mean CEV when compared to A and BF, whereas BF had lesser (P < 0.05) mean CEV than A and B. Breed types (A and BN) did not differ (P = 0.32) in mean CEV at Iberia, LA. At Raymond, MS, mean CEV was affected (P = 0.03) by breed type, but AX (lowest value) did not differ (P > 0.05) from AB, BNX, and A. The HX (highest value) was similar (P > 0.05) to BNX, AB and A for mean CEV. Breed type-differences for CEV has potential for among breed selection for temperament in weaner cattle.

Last Modified: 9/1/2014
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