Mapping quantitative trait loci (QTL) in sheep. IV. Analysis of lactation persistency and extended lactation traits in sheep

Table 1 Descriptive statistics of the persistency and extended lactation traits used in this study

Trait	Milk composition	n	mean	SD	min	max
	Milk	174	0.23	0.13	0.03	0.72
	Protein	162	0.47	0.15	0.14	0.99
Persistency	Fat	160	0.40	0.14	0.10	0.79
	Lactose	157	0.35	0.18	0.00	0.71
	Somatic cells	159	0.43	0.07	0.23	0.63
	Useful yield	162	0.65	0.12	0.28	0.91
	Milk	174	0.37	0.15	0.10	0.81
	Protein	161	0.89	0.23	0.42	1.97
Extended lactation	Fat	155	0.91	0.18	0.47	1.45
	Lactose	154	0.54	0.33	0.00	1.34
	Somatic cells	159	0.56	0.07	0.38	0.75
	Useful yield	144	1.09	0.30	0.48	1.75

Shown are the number of sheep with observations (n), the average (mean), standard deviation (SD), lowest (min) and highest (max) values of the variables calculated by fitting the Wood model using the nonlinear mixed model procedure in 'R'.

ISSN: 1297-9686