HOW TO USE THIS ONLINE MAGAZINE
by clicking the arrows at the side of the page.
by clicking anywhere on the page. A slider will appear, allowing you to adjust your zoom level.
and move the page around when zoomed in by dragging the page.
and return to the original size by clicking on the page again.
by entering text in the search field and click on "In This Issue" or "All Issues" to search the current issue or the archive of back issues
a PDF of this magazine.
by clicking on thumbnails to select pages, and then press the print button.
a page via email, Facebook, Twitter and more.
TO VIEW PREVIOUS EDITIONS
, click the
button at the bottom of the screen.
Beyond the Bale : February 2010
February 2010 BEYOND THE BALE 24 WOOL PRODUCTION The first breeding values for breech wrinkle were launched in September by Sheep Genetics, an AWI and Meat & Livestock Australia initiative. Australian Sheep Breeding Values (ASBVs) for breech wrinkle allow farmers to identify, select and breed from sheep that have improved natural resistance to flystrike. The ASBV for Early Breech Wrinkle gives Merino producers the potential to fast-track their progress to reduce breech wrinkle in their flocks. As breech wrinkle is strongly associated with flystrike, selecting rams with low Early Breech Wrinkle ASBVs will contribute to progeny with enhanced natural resistance to breech flystrike. This is the result of five years of intensive investment in research and breeding initiatives across the country. The research was funded by AWI and Meat & Livestock Australia, together with the Australian Merino Sire Evaluation Association and the Sheep CRC. Sheep with favourable Early Breech Wrinkle ASBVs have demonstrated less susceptibility to flystrike. However, research has also shown the relationship between breech wrinkle and fleece weight must be carefully managed, so as to prevent associated negative production effects. This can be achieved through fleece weight and staple length ASBVs, with environmental effects also an important factor. "AWI research has shown that animals with a breech wrinkle score of two or less have significantly reduced incidence of flystrike," Sheep Genetics manager Sam Gill says. "It is sheep breeders who make the choice to develop sheep suitable for their own environment and production system. It is also important that ram breeders use wrinkle ASBVs to select rams as there are some significant effects of sex, birth type, dam and age that could bias selection if not handled effectively," he adds. The accuracy of early breech wrinkle ASBVs has been validated with up to 10 years of research data (more than 15,000 records) that has found a strong association between breech and body wrinkle. Research has also shown highly wrinkled lambs tend to remain so throughout their lives. Sheep Genetics aims to produce one single breeding value for wrinkle that uses information from both early and later life measurements. Breech and body wrinkle scores have been collated from various industry sources such as the Sheep CRC Information Nucleus Flocks, Merino Sire Evaluation sites, MERINOSELECT members and AWI breech flocks. More information: www.wool.com www.sheepgenetics.org.au/MERINOSELECT www.merinosuperiorsires.com.au FAST FACTS l ASBVs for breech wrinkle have been developed due to the large impact of the trait on breech flystrike. l Their development could fast-track the production of animals with natural resistance to flystrike. Breech wrinkle ASBVs now available The launch of breeding values for breech wrinkle will help producers breed sheep with improved natural resistance to flystrike. 2009 MERINO SUPERIOR SIRES Merino breeders looking for the latest information on selecting rams to boost sheep productivity and reduce susceptibility to blowfly strike can gain powerful new knowledge from the recently published 2009 Merino Superior Sires report. Merino Superior Sires No. 15, published by the Australian Merino Sire Evaluation Association (AMSEA), is the latest edition of the report series that has been produced annually since 1994, enabling breeders to compare hundreds of top sires evaluated at up to 14 sire-evaluation sites across all the major wool-growing regions in Australia. AMSEA chairperson Knox Heggaton says Merino Superior Sires offers even more to breeders this year. "The recently released breech wrinkle ASBVs have been included in Merino Superior Sires for the first time," he says. "Using Merino Superior Sires, breeders can select for plainer, lower wrinkle sheep, while at the same time keeping an eye on productivity."
September November 2009