Table 3.

Qualitative indicators of milk from cows with different genotypes for the TG5 gene.

Indicator	Genotype			Difference between genotypes
	TG5CC	TG5CT	TG5TT	TG5CC/TG5CT	TG5CC/TG5TT	TG5CT/TG5TT
Black-and-white breed (n=50)
Milk yield, kg	4570.7±89.0	4756.4±99.7	4825.3±95.9	–185.7	–254.6*	–66.9
Fat, %	3.69±0.05	3.75±0.02	3.78±0.04	–0.06	–0.09	–0.03
Protein, %	3.28±0.07	3.26±0.01	3.25±0.08	0.02	0.03	0.01
Casein, %	2.77±0.10	2.88±0.05	2.83±0.09	–0.11	–0.06	0.05
Lactose, %	4.95±0.15	4.99±0.04	4.97±0.11	–0.04	–0.02	0.02
MSNF, %	8.91±0.17	8.97±0.22	8.95±0.18	–0.06	–0.04	0.02
Milk fat, kg	168.6±5.2	178.3±4.5	182.4±4.9	–9.7	–13.8*	–4.1
Bestuzhev breed (n=50)
Milk yield, kg	3428.4±88.5	3450.1±78.9	3581.2±56.9	–21.7	–152.8	–131.1
Fat, %	3.50±0.07	3.57±0.09	3.88±0.06	–0.07	–0.38**	–0.31**
Protein, %	3.22±0.06	3.26±0.07	3.47±0.03	–0.04	–0.25**	–0.21**
Casein, %	2.80±0.17	2.76±0.11	2.85±0.10	0.04	–0.05	–0.09
Lactose, %	4.64±0.12	4.25±0.14	4.86±0.10	0.39	–0.22	–0.61**
MSNF, %	8.56±0.15	8.66±0.17	9.03±0.26	0.1	–0.47	–0.37
Milk fat, kg	119. 9±6.1	123.2±4.9	138.9±5.1	–3.3	–19.0*	–15.7*
Simmental breed (n=50)
Milk yield, kg	3785.5±88.5	3829.6±80.6	3975.2±56.9	–24.1	–189.7*	–145.6
Fat, %	3.66±0.08	3.62±0.09	3.92±0.09	0.04	–0.26*	–0.3*
Protein, %	3.37±0.07	3.29±0.08	3.56±0.06	0.08	–0.19*	–0.27*
Casein, %	2.90±0.19	2.86±0.12	2.95±0.11	0.04	–0.05	–0.09
Lactose, %	4.52±0.13	4.50±0.16	4.55±0.14	0.02	0.03	0.05
MSNF, %	8.74±0.17	8.80±0.23	9.03±0.17	–0.06	–0.29	–0.23
Milk fat, kg	138.5±7.0	138.6±6.5	155.8±4.8	–0.1	–17.3*	–17.2*

MSNF=Milk solids non-fat, Significance of differences according to Student’s t test

^*-p<0,05;

^**-p<0,01