SNP-based mate allocation strategies to maximize total genetic value in pigs

Table 4 Expected total (\(\Delta G\)) and additive \(\left( {\Delta U} \right)\) genetic gain obtained from matings selected on estimated breeding value \(\left( {\widehat{u}} \right)\) or on estimated total genetic value \(\left( {\widehat{g}} \right)\)

Trait	Expected gain	Selection on \(\widehat{u}\)		Selection on \(\widehat{g}\)
Trait	Expected gain	Trait units	Genetic SD units	Trait units	Genetic SD units
AGE (days)	∆U	− 2.24	− 0.56	− 2.21	− 0.55
AGE (days)	∆G	− 2.19	− 0.54	− 2.98	− 0.74
BD (mm)	∆U	− 0.35	− 0.58	− 0.35	− 0.58
BD (mm)	∆G	− 0.35	− 0.58	− 0.39	− 0.65
APWL (g)	∆U	59.04	0.49	58.35	0.49
APWL (g)	∆G	59.44	0.50	70.78	0.59

\(\Delta G\) (or \(\Delta U\)) is the difference between the mean \(\widehat{u}\) (or the mean \(\widehat{g}\)) of selected matings and the mean \(\widehat{u}\) (or the mean \(\widehat{g}\)) of all possible matings of the expected progeny
AGE age at 100 kg, BD backfat depth, APWL average piglet weight at birth within litter

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