TABLE 6.

The results of the least-squares analysis across families for first and later (second and third) lactations

Trait		F-ratio	Position (cM)	Pchr
First lactation	Protein content	2.45	45	<0.0009
	Fat content	2.05	45	<0.0109
	Protein yield	1.67	65	<0.0448
Later lactations	Milk yield	2.19	59	<0.0031
	Protein content	2.98	43	<0.00005
	Fat content	2.37	45	<0.0033
	Protein yield	1.87	62	<0.0182
	Fat yield	1.76	41	<0.0438

Significance thresholds were determined by permutation. The highest test statistics (F-ratios) and their positions (centimorgans) for all chromosomewise significant effects (P_chr < 0.05) are shown.