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The material consisted of 60 hybrid boars, from line 990 (female) and Pietrain breeds (male), divided into two groups depending on the litter size in which they were born and reared - group: 7-10 piglets (average 8.8) per litter; group: 11-17 piglets (average 12.5) per litter. The mean body weight of 21 day of live piglets born and reared in larger litters was significantly (P < 0.05) lower than...
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