Show I 1 hybrid hogs produce super meat development of a super meat yielding hybrid hog by the application of the same inbreeding methods that produced hybrid corn Is the goal off of farm armi autho authorities thirteen state experiment stations ire are cooperating in what Is known as the regional swine breeding lab laboratory orator george A montgomery writes in cappers farmer they are Inbreed inbreeding some of the more popular breeds with the hope of establishing superior types ainali in this ts they are following the methods of those who developed inbred parent stock for modern hybrid corn the hog bog men are little further advanced in id their program than corn men were 15 or 20 years adz mr montgomery points out they have their reds but the work of main in hi sherd 1 sows bows must be able to produce large litters of live pigs 2 A high percentage of pigs born alive must survive to market age 3 pigs must gain rapidly from birth to market weight 4 feed requirements quire ments far or each unit of gair gain must be low 5 body form must be such as to produce high yields of the most desirable cuts of pork ahe he has succeeded in fixing the last three characteristics so some of his lines 11 nes and crosses of these lines excel purebred polands bolands that have been propagated by ordinary breeding methods however inbreeding lowers vitality and to a lesser extent fertility and crossing two unrelated inbred lines of the same bried breed does docs not produce the hybrid vigor that comes when two breeds are crossed winters ex new type minnesota hyari hog combining them to see which ones nick has hardly started minnesota and iowa for example have crossed inbred lines of poland chinas cainas with certain elements in the results highly encouraging others distinctly disappointing at the minnesota station dr M L winters working with poland chinas cainas has saved only individuals that best combine five economical ly desirable characteristics to re plains that this Is because the base is too narrow work done at the minnesota station with ordinary purebred boars baars bears out this theory A cross of a purebred boar of one breed with a purebred sow of another gave pigs that were superior to either parent breed the crossbred gilts mated to a purebred boar of a third breed were still better than a two breed cross if winters beliefs are borne out a tanner farmer of the future may start for example with sows bows obtained obtain dd by crossing the best line of inbred polands bolands Po lands that come out of minne botas experiments on the fastest line of Harrip shires developed at the illinois experiment station these would then be bred to an inbred duroc boar from the line developed at the ohio stat station JorL gilts of that line might be mated to an inbred berkshire after which the producer might go to a hampshire boar and continue thereafter the hampshire poland duroc berkshire rotation |