Host genetic control on rumen microbiota and its impact on dairy traits in sheep

Table 2 Descriptive statistics and heritability (\({h}^{2}\)) of dairy traits in Lacaune ewes

	Mean	SD	CV (%)	\({h}^{2}\)	SE \({h}^{2}\)
Traits expressed on a daily basis^a
Milk yield (mL)	1946	589	30.3	0.28	0.06
Fat content (g/100 mL)	7.37	1.14	15.5	0.59	0.06
Protein content (g/100 mL)	5.71	0.52	9.1	0.57	0.06
Alpha-S1-casein	1.38	0.15	10.9	0.54	0.08
Alpha-S2-casein	0.66	0.26	39.4	0.68	0.07
Beta-casein	2.10	0.23	10.9	0.41	0.08
Kappa-casein	0.45	0.04	8.9	0.50	0.08
Alpha-lactalbumin	0.13	0.01	7.7	0.36	0.08
Beta-lactoglobulin	0.46	0.50	108.7	0.44	0.08
Butyric acid (C4:0)	0.25	0.03	12.0	0.50	0.08
Caproic acid (C6:0)	0.21	0.03	14.3	0.53	0.07
Caprylic acid (C8:0)	0.20	0.03	15.0	0.55	0.08
Capric acid (C10:0)	0.73	0.12	16.4	0.58	0.07
Lauric acid (C12:0)	0.49	0.08	16.3	0.60	0.07
Palmitic acid (C16:0)	1.96	0.37	18.9	0.54	0.08
Oleic acid (cis-9 C18:1)	0.80	0.31	38.7	0.44	0.08
Rumenic acid (cis-9 trans-11 C18:2)	0.04	0.02	50.0	0.45	0.08
Alpha-linolenic acid (C18:3n-3)	0.04	0.01	25.0	0.38	0.08
Traits expressed on a lactation basis
Lactation somatic cell score (LSCS)	3.29	1.50	45.6	0.33 to 0.41^b	0.07 to 0.09
CV milk	53.93	12.18	22.6	0.19 to 0.26^b	0.07 to 0.09

SD standard deviation, CV (%) coefficient of variation expressed in percentage, SE standard error
^aMilk proteins and fatty acids given in g per 100 mL
^bMean heritability of LSCS and CV milk estimated for each three-trait model

ISSN: 1297-9686