Dairy-beef offering potential for savings
Beef produced from cattle from New Zealand's dairy sector could provide reductions in greenhouse gas emissions of up to 48, compared to the average for beef cattle, a new study by AgResearch has found.
It could also see a potential reduction in the incidence of animal health problems such as ryegrass staggers.
Scientists at AgResearch want to run outdoor field trials on gene edited endophytes in ryegrass to see if the results of laboratory tests are valid in an outdoor environment. To do this they need approval from the Environmental Protection Agency (EPA).
The trials to date have been conducted at AgResearch's Grasslands facility at Palmerston North. But this new proposal is taking this a step further to see if the endophytes perform as well in the outdoor environment as they do in the glasshouses where the present trials are being conducted. It should be noted that outdoor trials of a similar nature on gene edited endophytes in ryegrass are already being conducted in Australia.
AgResearch science team leader Dr Richard Scott says the endophytes are symbiotic fungi that live within the ryegrass plant and some of the products they produce provide protection against pests. He says the endophyte is only found in the plant tissue and plant seeds and can't be transferred by an insect or pollen - only by seed.
Scott says if the trial is approved, the plants will not be allowed to seed so that no material can be spread by the wind or birds beyond the designated containment area.
"Let's be clear, we are only modifying the endophytes - not the ryegrass plant as a whole," he told Rural News.
The application to the EPA which has the power to approve or reject the AgResearch proposal is very significant historically. The last application of this nature to be approved was back in 2010 when Scion, also known as the Forest Research Institute, was granted approval for an outdoor trial to grow genetically modified radiata pine trees.
Scott says AgResearch has lodged a draft application with the EPA to set the process in motion.
"They will look at our draft and likely ask for clarification or more information until they are satisfied that they have enough data to make a decision. Initially this is an iterative process," he says.
Once the EPA has gone through the draft, then he says a formal proposal will be lodged which will be put out for public consultation before a final decision is made.
Scott says, from their lab work, they are confident that they know how the endophytes are behaving in the plants. But he says only when field trials are done and the laboratory gene edited endophytes are tested in the 'normal outdoor' environment will there be conclusive proof. He says initially the trials will take place in one location, but over time others could also be used.
