Table 2.

Estimates of additive genetic variance ( ), permanent environmental variance ( ), residual ( ) and phenotypic ( ) variances and heritability ( ) obtained by one-trait analyses.

Trait1					± SE
UM150_270	39,042	50,041	108,973	198,057	0.20 ± 0.04
CM150_270	36,128	38,321	80,182	154,631	0.23 ± 0.04
FM150_270	45,640	41,761	94,851	182,252	0.25 ± 0.04
UM90_270	38,656	55,827	123,105	217,589	0.18 ± 0.04
CM90_270	34,748	36,829	79,572	151,148	0.23 ± 0.04
FM90_270	54,485	41,501	98,408	194,395	0.28 ± 0.04
UM150_305	43,039	54,172	122,830	220,039	0.20 ± 0.04
CM150_305	37,470	39,762	80,195	157,427	0.24 ± 0.04
FM150_305	54,595	49,019	112,484	216,097	0.25 ± 0.04
UM90_305	40,906	60,968	137,820	239,693	0.17 ± 0.04
CM90_305	35,278	38,696	79,226	153,200	0.23 ± 0.04
FM90_305	56,598	44,984	109,766	211,348	0.27 ± 0.04

¹Unadjusted milk yield for lactations from 150 to 270 (UM_{150_270}), 150 to 305 (UM_{150_305}), 90 to 270 (UM_{90_270}) and 90 to 305 (UM_{90_305}) days in milk; Adjusted milk yield for days in milk using multiplicative correction factors for lactations from 150 to 270 (FM_{150_270}), 150 and 305 (FM_{150_305}), 90 and 270 (FM_{90_270}) and 90 to 305 (FM_{90_305}) days in milk; Adjusted milk yield for days in milk including days in milk in the model for lactations from 150 to 270 (CM_{150_270}), 150 to 305 (CM_{150_305}), 90 to 270 (CM_{90_270}) and 90 to 305 (CM_{90_305}) days in milk. SE – standard error.