F. Siewerdt et Ra. Cardellino, THE EFFICIENCY OF USING MORE THAN ONE RECORD AS THE SELECTION CRITERIA FOR LITTER TRAITS IN PIGS, Brazilian journal of genetics, 18(3), 1995, pp. 397-403
Repeatability estimates for litter size and weight, at birth and at da
y 21, are reported for three breeds of pigs. The estimates ranged from
0.122 to 0.185, averaging 0.149. The repeatabilities were used to max
imize the genetic progress in litter traits per time unit, and a rough
prediction of genetic progress in the sampled populations was provide
d. It was concluded that data from the first two litters should be use
d to obtain the maximum possible amount of genetic progress.