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In effect, this means that 100 purebred Highland cows can produce on the average 2,020 pounds - A FULL TON OF CALVES TO SELL AT WEANING TIME - more than 100 purebred Hereford cows can. Highland Hereford Cross cows can produce 5,721 lbs, NEARLY THREE TONS, more than purebred Hereford cows can, per 100 cows.
These herds were kept under identical conditions, rather poor short-gross prairie range. The females were only "run-of-the-mill", with no special selection. A farmer following a similar breeding program, using a top-gaining Highland bull on his existing cow-herd to produce Highland Cross dams, should be able to far exceed these figures. With better pasture, fertility and weaning weights would be better, adding environmental advantage to genetic advantage.
The Highland Hybrids surpassed the Herefords by 6.0 percent (Canadian Journal of Animal Science Vol. 44). Of course, we can expect "hybrid vigour" in almost any cross, but it is interesting to compare these figures with those from Hereford-Angus cross calves whose average weaning weight was superior to that of the parental breeds by only 3.5 percent (Canadian Journal of Animal Science Vol. 14).
Why this greater hybrid vigour? In breeding the new corn hybrids, strain "A" is self pollinated, strain "B" is self pollinated, then strain "A" is bred to strain "B". It is possible that in cattle breeding the same thing is being done. Purebred Herefords have a long history of breed purity, without a mixture of other genes. The Highland breed has been similarly isolated. Then when the two are bred together, they "nick", as the cowman says.
The Highland has proved its ability to "nick" well with other breeds, such as Shorthorn and Angus. It is common practice in Scotland to breed Highland cows to a beef Shorthorn bull, to produce market cattle. A new breed the "Luing" has been established with 3/8ths Highland and 5/8ths Shorthorn blood, and is fast gaining in popularity in Britain. Of course the breeder who wants hornless cattle can simply introduce polled Hereford, polled Shorthorn, Angus or Brangus blood when producing his polled cow herd, and still keep the advantages of a liberal percentage of highland blood.
Here are a few more statistics regarding steers fed out and butchered at Manyberries Experimental Station, from KYLOE CRY, 1971, No. 1. The superiority of the Highland Hybrids over pure Herefords in rib-eye area is one of the points of interest.
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