Working together for Australian excellence
Analysis of results from the recent 2013 Royal Adelaide Show led steer on hoof and on hook competition provided evidence that Limousin has maintained its dressing percentage advantage over all other breeds, but also identified inconsistencies between ultra sound scan and abattoir carcase measurements, especially for eye muscle area...... more
Two NSW DPI/MLA reports provide insights into the economics of cattle in commercial herds that are heterozygous for myostatin mutations. Myostatin mutations such as F94L found in French Pure and high French content Limousins are associated with, among other things, higher meat yield, higher proportion of preferred cuts of meat, and leaner, more tender meat...... more
Just how accurate are their EBVs?
Of the 311 sires published in the June 2013 published sire list, 158 also appeared in the December 2009 list. Although EBV corrections made during this period could be described as spectacular or catastrophic, depending on whether the EBV "improved" or "worsened", in fact most were within the bounds of error represented by the original EBV accuracies.
More telling though was the impact the corrections had on the ranking of the animals. If the EBVs in 2009 had been originally ranked in the top 10% of the breed, then the corrections represented falls in ranking ranging from 15% (to top 25% of the breed) to 85% (or bottom 5% of the breed)!
This demonstrates why stud cattle breeders should be extremely cautious in not misleading potential clients with animal descriptions that rely on EBV ranking..... more
The process of purchasing, delivering, settling in, and managing new bulls is described.
New Zealand research indicates that in an average herd, 90% of cows were pregnant after a mating period of nine weeks, that an optimum cow:bull ratio was in the range 1:20 to 1:55, and that herds that did not cull on temperament had higher conception rates than those that did.
Other research indicates that a useful "rule-of-thumb" for the bull to female ratio is one female per month of age of the bull up to 30 months of age. An 18-month-old bull could thus run with 18 females, and a two-year-old bull (24 months of age) could be exposed to 24 females. Other research recommends limited mating loads for young bulls to 25 - 30 females for 6 - 8 weeks, and then spelling them for at least three months.... more
Although often referred to by stud breeders and in the literature, no current definition of Limousin trait leader could be found in official publications.
However, a review of published sire lists available on the ABRI website enabled selection criteria to be deduced, although the criteria do seem to change over relatively short periods. This review is valid only for the January 2013 published sire listing.
In summary, for a sire to become a trait leader it must satisfy three criteria. Firstly, the sire must be a published sire. Secondly, the sire must have an EBV accuracy in one of 13 selected traits of 75% or greater. Note that the LMA Breedplan article observes that 75% Breedplan accuracy is low accuracy, contrary to the perception the high figure might convey. Finally, the EBV must be ranked in the top 5%, 10% or 20%, depending on which trait is considered....More
A year ago a stud cattle breeder questioned an unusually large rise in the eye muscle area EBV of a foreign AI sire, and recently another breeder observed widespread, large falls in the docility EBVs of Limousin Information Nucleus (LIN) sires. Both changes, in fact, should have been considered unremarkable because they were within the error margins defined by the EBV accuracy figures.
A common theme among stud cattle breeders appears to be overestimation of Breedplan's capabilities (not actively discouraged by breed associations and societies) arising from a failure to understand the significance of EBV accuracies.
The LMA has developed an alternative method of presenting EBV, $Index and accuracy information with the aim of improving understanding and interpretation of Breedplan figures. ...More
US Limousin breeders' preoccupation with estimates of genetic merit (EPDs/EBVs) appears to have led to a significant decline in Limousin's key attributes of retail beef yield and feed conversion efficiency. What could Australian breeders do to prevent them going down a similar path?..... More
Limousins are noted for their superior meat yield- both live weight to carcase and bone out i.e percentage saleable meat from each carcase.
It is not unusual for Limousins to dress up to 64% of live weight. British and Bos Indicus breeds struggle to dress at 56%. ...... More
Limousin Bulls have the capacity to sire more than 50 calves annually.
Limousin Bulls have often worked for more than 10 years.
Limousin/Limousin-cross premiums are often up to $100 per head !! .....More
A team of researchers from Adelaide University have discovered the positive effects of the gene scientifically known as the "F94L Gene". Dr Wayne Pitchford explained in an interview on the ABC's Country Hour on 15th July 2008 that the presence of this Gene can increase beef yields by 20% without the need for additional feed. .....More
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