ET gives plenty to phone home about

摘要

Roger Evans has been to see Llew and Sarah Thomas' Tremenyn herd where embryo transfer is making a big contribution to genetic progress. We hear a lot these days, about the 'gap' - the genetic divide that exists between the PIN95 genetic base of cowsin this country and the cows of the other leading milk producers of the world. Putting a value of Szero on UK cows, that gap ranges from +￡20 in Canada, to plus +39 and +￡40 in the US and Holland respectively.