Show hybrid hoos hogs produce super meat development of a super meat yielding hybrid hog by the ap application of the same inbreeding methods that produced hybrid corn is the goal of farm authorities thirteen state experiment stations are cooperating in what is known own as the regional swine breeding laboratory george A montgomery writes in cappers farmer they are inbreeding some of the more popular breeds with the hope of establishing superior types in this they are following the methods of those who developed inbred parent stock for modern hybrid corn the hog men are little further advanced in their program than corn men were 15 or 20 years ago mr montgomery points out they have their but the work of main in his herd 1 sows bows must be able to produce large litters of live pigs ggs 2 A high percentage of pigs born bom uve alive must survive to market age 3 pigs must gain rap rapidly idly from birth to market weight 4 feed requirements quire ments for each unit of gain must be low 5 body form must be such as to produce high yields of the most desi desirable desirably e cu cuts ts of pork he has succeeded in fixing the last three characteristics so some of his lines and crosses of these lines excel purebred polands bolands that have been propagated by ordinary br breeding din methods however in inbreeding lowers vitality and to a lesser extent fertility and crossing two unrelated inbred lines of the same breed does not produce the hybrid vigor that comes when two breeds are crossed winters ex s 4 4 C new type Alinne minnesota sota hybrid hog bog 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 work ing with poland chinas cainas has saved only inc individuals livid bals that best combine five economically desirable characteristics to re plains that this is because t the he base is too narrow work done at the minnesota station with w ith 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 farmer of the future may start for example with sows bows obtained by crossing the best line of inbred polands bolands that come out of minne botas experiments on the fastest line of Hamp shires developed develop eq at the illinois experiment station these would then be bred to an inbred duroc boar from the line developed at the ohio station gilts of that line might be mated to an inbred berkshire after which the producer might go to a Hamp hampshire shir e boar and continue thereafter the hampshire poland duroc berkshire rotation |