Genomic selection (GS) as theoretically introduced by Meuwissen et al. (2001) has been successfully implemented worldwide in dairy cattle breeding programs reflecting large populations, i.e., Holsteins, Fleckvieh, Jersey, and Brown Swiss, and has revolutionized conventional breeding schemes. Revolution of dairy cattle breeding programs via GS was the logical consequence due to the obvious possi...

We estimate the value of using information from genetic marker panels for seven economically relevant feedlot cattle traits. The values of using genetic information to sort cattle by optimal days-on-feed are less than $1/head for each of the traits evaluated. However, the values associated with using genetic information to select cattle for placement are as much as $38/head. The most economical...

The BLRI Cattle Breed 1(BCB-1) is a native cattle breed developed by Bangladesh Livestock Research Institute (BLRI) through selective breeding among indigenous cattle of Bangladesh. Data asserted from record sheets of 529 animals maintained during 1992 to 2006 were analyzed to evaluate the reproductive efficiency of BCB-1 cattle in different generations, seasons and parities. The highest percen...

Removing select cattle from a herd (culling) is done to improve herd performance and profitability Production and market conditions influence culling criteria Some cattle are obvious candidates for culling (e g , cows with poor breeding performance or cancer eye), but cattle can and should be culled for reasons that may not be readily observable Simply put, cows are selected for culling based o...

In order to allow consumers to trace to the whole process of beef breeding, production and processing after purchasing beef, to achieve smart, fast and practical goals for quality and safety of beef traceability system, B / S (Browser / Server) mode architecture is used to build quality beef traceability system based on RFID technology in this paper. First, the system is analyzed, the structure...

last rib backfat thickness, broken vertebrae, or scores for stomach ulcers (P > 0.21). Also, deletions of VTM premixes did not affect these same measurements (P > 0.22). However, RAC decreased (P < 0.01) backfat thickness by 8% and tended to decrease scores for stomach ulcers (P < 0.06). In conclusion, there were no interactions to suggest that the effects of RAC on growth performance and carca...

Behavioural and endrocrin%gical data on African elephants (Loxodonta africana) are integrated to provide a hypothesis oj the adaptations reflected in the phenomenon of musth in bulls. Occupation oj home ranges, movements. male dominance hierarchies and intra-specific agonistic behaviour are reviewed. Bulls in musth leave their home range, travel far and jast, initiate more contacts with distant...

Some 60% of Australia% beef cattle are located in the tropics and subtropics, grazing, in general native pastures of low digestibility and N content. Production per head is low, as also are reproductive rates. The nutritional problem centres around the low contents of phosphorus, sulphur and nitrogen in pastures from June to December. This paper discusses responses in breeding cattle to supplem...

Received: Revised: Accepted: May 30, 2011 June 11, 2011 June 13, 2011

The interest in the effect of genotype × environment interaction is increasing because animal breeding programs have become geographically broader. Climate changes in the next decades are also expected to challenge the present breeding goals, increasing the importance of environmental sensitivity. The aim of this work was to analyze genotype × environment interaction effect on cattle BW using t...