Influence of milking frequency on genetic parameters associated with the milk production in the first and second lactations of Iranian Holstein dairy cows using random regression test day models

Table 3 Number of estimated parameters, log likelihood values and Schwarz’s Bayesian information criteria (BIC) for 3X milking frequency in the first and second lactations

Lactation	Ka^a	Kpe^b	Number of parameters	Log likelyhood	BIC
Lact 1	1	1	16	−106,018.02	212,111.7
	2	1	19	−105,796.05	211,682
	2	2	22	−105,772.28	211,648.6
	3	2	25	−105,735.65	211,589.5
	3	3	28	−105,703.71	211,539.9
	4	2	28	−105,680.26	211,493
	4	3	31	−105,656.98	211,460.6
	4	4	34	−105,645.56	211,451.9
	5	2	31	−105,661.18	211,469
	5	3	34	−105,648.43	211,457.7
	5	4	37	−105,635.52	211,446 ^c
	5	5	40	−105,675.21	211,539.6
Lact 2	1	1	16	−131,871.6	263,819.6
	2	1	19	−131,569.2	263,229.1
	2	2	22	−131,516.12	263,137.3
	3	2	25	−121,394.82	242,909 ^c
	3	3	28	−141,350.47	282,834.7
	4	2	28	−131,347.03	262,827.8
	4	3	31	−131,303.31	262,754.7
	4	4	34	−131,275.85	262,714.1
	5	2	31	−131,134.43	262,416.9
	5	3	34	−131,086.81	262,336
	5	4	37	−131,050.94	262,278.6
	5	5	40	−131,041.94	262,274.9

^aka: order of fit for additive genetic effect
^bke: order of fit for permanent environmental effect
^cSelected order of legendre polynomials for the genetic and permanent environmental effects (best model)

ISSN: 2055-0391