Estimates of genetic parameters were obtained using REML methods on 5291 all parity and 1416 first parity litter records. Estimates of heritability and repeatability of traits were consistent with those reported elsewhere at 0.1, 0.2 for litter size and 0.21, 0.28 for birth weight respectively. Maternal effects were seen to be very small, particularly in gilts.

J. T Mercer, R. E Crump

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume XV. Beef cattle, sheep and pig genetics and breeding, fibre, fur and meat quality., , 489–492, 1990
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