Genetic characteristics of colostrum refractive index and its use as a proxy for the concentration of immunoglobulins in Holstein cattle

Table 1 Descriptive statistics and heritability (standard error) of colostrum traits

Trait	n	Mean	Minimum	Maximum	\({\mathrm{CV}}_{\mathrm{p}}\)	\({\mathrm{CV}}_{\mathrm{ag}}\)	\({\sigma }_{\mathrm{p}}^{2}\)	\({h}^{2}\)
BRIX, %	542	23.19	10.40	32.00	0.18	0.09	16.04	0.26 (0.14)
IgG, g/L	494	92.71	1.96	208.50	0.39	0.16	1103.10	0.21 (0.14)
IgA, g/L	423	4.84	0.13	15.58	0.59	0.22	6.51	0.17 (0.16)
IgM, g/L	481	5.17	0.26	14.01	0.49	0.24	5.87	0.27 (0.15)

CV_p coefficient of phenotypic variation calculated as the ratio of unadjusted phenotypic standard deviation (raw data) to the overall mean, CV_ag coefficient of additive genetic variation calculated as the ratio of additive genetic standard deviation to the overall mean, \({\sigma }_{p}^{2}\) , phenotypic variance, calculated as the sum of the additive genetic and residual variances, h² heritability, BRIX refractive index, IgG immunoglobulins G, IgA immunoglobulins A, IgM immunoglobulins M

ISSN: 1297-9686