Sources of variation in litter size and weight at birth and at 21 days of age in Duroc, Landrace and Large White pigs. 1. Litter size
Milagres, J.C.; Fedalto, L.M.; Silva, M. de A. e; Pereira, J.A.A.
Revista da Sociedade Brasileira de Zootecnia 10(4): 653-671
For 546 Landrace, 652 Large White and 421 Duroc litters, total litter size at birth averaged 10.94, 11.38, and 10.24 resp., the number of liveborn piglets per litter 10.19, 10.65 and 9.45, and litter size at 21 days 9.24, 9.58 and 8.21, the performance of Durocs being significantly inferior to that of the other 2 breeds. Herd had a significant effect on all litter traits, but season of farrowing and age at 1st farrowing did not.