ABOUT 4000 lambs from 100 sheep sires will be enlisted in investigating the genetic relationships between feed intake and conversion efficiency, and greenhouse gas production, in a huge Western Australian-based project.
The five-year project aims to improve the feed conversion efficiency of sheep – so future generations require less feed to produce more meat, while emitting less methane and carbon dioxide.
The project is the first to be undertaken in the DPIRD’s new 300-head sheep feed intake facility – the biggest in Australia – at its Katanning Research Station.
It is being led by the Department of Primary Industries and Regional Developments in partnership with Meat and Livestock Australia.
The research is aimed to enabling farmers to breed more efficient, sustainable sheep to satisfy increasing customer demand for low emission products is set to commence at a new state-of-the art facility in the Great Southern.
Lambs from DPIRD’s longstanding genetic resource flock at Katanning, which also receives funding from MLA, will be used for the new research project. The genetic resource flock generally includes 50 percent terminal sires (Suffolks, Poll Dorsets and White Suffolks), 20pc maternal sire breeds (Border Leicester, Merinos and Dohnes) and the remaining 30pc are Dorpers.
The research will underpin the addition of sustainability traits to Australian Sheep Breeding Values (ASBVs) so farmers can select animals that help them achieve their breeding objectives.
Project lead and DPIRD research scientist Beth Paganoni said the new equipment in the sheep feed intake facility would enable accurate measures of feed intake, gas production and body composition to be measured together for the first time.
“It has previously been difficult to measure feed intake on large numbers of sheep accurately, but now we have the facilities and technology to do so.
“Over the next five years we plan to measure the feed intake, growth and composition of about 4000 lambs from 100 sires to investigate the genetic relationships between feed intake, feed conversion efficiency and gas production,” she said.
“These ASBVs will assist the Australian sheep industry to breed a more efficient, sustainable flock, while reducing production costs and improving environmental outcomes to respond to customer demand for low emission meat and wool.”
The sheep feed intake facility features automated feeders that weigh and disseminate precise amounts of feed through an individual feeder to 20 pens, that hold up to 15 sheep each. Each sheep will have individual meals weighed using electronic identification technology and its total feed intake recorded throughout a 24 hour period.
A new Dual Energy X-ray Absorptiometry, or DEXA, machine will be used to objectively measure muscle, fat and bone weight, to provide a live analysis of body composition. The emissions of each animal will also be measured using portable accumulation chambers.
The initial diet will feature a high growth feed regime, such as feedlot grower pellets, to provide the foundation benchmark while, in time, the research could extend to poorer feed quality and additives.
Ms Paganoni said comparisons will also be made between feed intake and body composition to determine the difference between sheep that have low or high feed efficiency.
“This will include measurements of feed intake, growth, gas production, including carbon dioxide and methane, as well as body composition.
“This data will help to determine ASBVs for the efficient conversion of feed to products, including the methane produced.”
The milestones and results from the project will be shared with industry periodically as the project progresses.
MLA program manager – genetics, Hamish Chandler, said genetics were tools the WA sheep industry could use now and into the future to build a more sustainable flock.
“Sustainability has never been more important, when you look at the current market and seasonal conditions facing producers, right across the country.
“Consumer expectations for sustainability and carbon neutrality are placing greater demands on livestock producers,” he said.
“The ultimate aim is to produce productive livestock even in the face of Australia’s increasingly variable climate.”
The sheep feed intake facility features controlled temperature, air quality, air flow and wind speed, complemented by new undercover yards, best practice biosecurity controls and storage silos.
Picture caption: The project in DPIRD’s new Sheep Feed Intake Facility is about to get underway to breed sheep that require less feed to produce more meat and less carbon emissions.