SOW'S LARGE FAMILIES
1 " 1 An illustration of the influence of inheritance on the size of pig litters is provided by a sow which: has- pr.oduced in two years and two montlis, five litters aggregating 74 piglets, 58 of which were born alive. This prolifie three-year-old sow, bred by klassey Agricultural College, has just produced a litter of 15, .12 of which were alive at birth. Her first family of nine (seven boni alive), arrived on January 12, 1944, and since then her performances have been: Litter of 13 (11 alive), 17 (14), 20 (14), and 15 (12). Her mother, product of the mating of a Large Wliite board with a Tamworth sow, was from a litter of eight; and she herself, a threequarter Large White, was oue of a litter of 19. Production of large litters has been due in part to" the practice of the College in controlling services by boars so that the greatest number of female eggs may be fertilised during the three-day heat period. This lias been done by allovving- the boar to lun with the sow for only a limited time on each of those days, so tliat cacli day 's batch of eggs may be fertilised . by sperm whicli has not rapidly lost its vigour tlirough over-indulgeuce by the boar on tlie first day.
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Chronicle (Levin), 13 April 1946, Page 6
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221SOW'S LARGE FAMILIES Chronicle (Levin), 13 April 1946, Page 6
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