Table 2.

Summary of random and fixed effects fitted for each trait

Effect1	Traits
	STAY	MAX	PIWI	LBW	LVAR	LMO	TNB	STB	GLE	FRT
Random effects
Animal	●	●	●	●	●	●	●	●	●	●
PE				●	●	●	●	●	●	●
Sire							●	●	●	●
Fixed effects
Parity				●	●	●		●
HYSF			●	●	●	●	●	●	●
HYSI1	●	●
HYSI										●
I2							●	●	●
CIWP							●	●
CTNB				●					●
LP			●
LP2			●
NW			●
PBCB						●	●	●	●

1Sire, service sire; PE, permanent environment; HYSF, herd-year-season at farrowing; HYSI1, herd-year-season at first insemination; HYSI, herd-year-season at insemination; I2, second insemination; CIWP, class interval between weaning a pregnancy; CTNB, class of total number born; LP, lactation period; LP2, LP × LP; NW, number weaned; PBCB, purebred or crossbred litter; LBW, litter birth weight; LVAR, litter variation; STAY, stayability after second cycle; MAX, maximum cycle number; TNB, total number born; STB, total number stillborn; LMO, litter mortality; PIWI, prolonged interval between weaning and first insemination; GLE, gestation length; FRT, farrowing rate.