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Article

Estimation of direct and maternal genetic variance for litter size in Canadian Yorkshire and Landrace swine using an animal model.

Journal of animal science - 1 Jul 1990

Southwood O I, Kennedy B W

Abstract excerpt

Estimates of additive direct heritability (h2a) for traits such as litter size may be biased by maternal effects. The size of these effects was estimated using a derivative-free restricted maximum likelihood procedure under an animal model. First-parity records from Yorkshire (Y) and Landrace (L) gilts were obtained from the Quebec Record of Performance sow productivity program for 21,127 litters born between...

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Identifiers

PMID: 2384377
DOI: 10.2527/1990.6871841x

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Source receipt: pubmed, retrieved 7 Sept 2026.

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