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the New Zealand agribusiness center agricultural science award we know that cows are all different that's why we're trying to measure something we have to have several cows we also figured that some are more efficient than others and what that means is some need less food to make even more milk there's others lead a lot of food to make the same amount of milk or maybe a bit less so the project was aimed at identifying genomic markers for efficiency and to be able to do this we've got about a thousand and fifty six to eight month old Holstein Friesian heifer calves through the pins and feed them in the pins for 60 days we measured their intake in their life weight gain and we identified that the ten percent most efficient cars eight twenty percent less than the ten percent least efficient car so then we took the most efficient carbs and least-efficient carbs through to lactating animals and put them through the the important thing was the cards that were identified as being most efficient was still the most efficient when lactating to do that we had to have quite a lot of automation and we also did something quite unusual because even though we're interested in dairy cows that produce milk we actually did most of our measurements with the young heifers before they were lactating and measured how much feed they needed to growth the assumption underneath all this was differences in efficiency of all controlled by a biochemistry by your digestion and if you are efficient for growth you'd be efficient for lactation and that was the underlying philosophy one of the challenges really that we had here was to try and utilize this information that and that commercial setting for farmers and so let's see if the first time would actually commercialized and send out to farmers now alpha catalog a fee conversion efficiency greeting value so now in farm is by balls by seamen they could actually look at the breeding worth of the animal and also at the same time that the feed conversion efficiency and add the two together and make a a better selection decision