Table 4. Heritability (± standard errors) of microbiota composition and genetic correlations (± standard errors) between microbiota composition and digestive efficiency.

Trait	h²	Genetic correlations with
		AMEn 1	CDUDM	CDUS	CDUL	CDUP
Log(L. salivarius)	0.048 ± 0.071	-0.084 ± 0.526	-0.333 ± 0.409	0.095 ± 0.639	-0.543 ± 0.572	-0.672 ± 0.269
Log(L. crispatus)	0.080 ± 0.058	0.235 ± 0.589	0.764 ± 0.388	-0.108 ± 0.623	0.230 ± 0.593	-0.255 ± 0.617
Log(Lactobacillus)	0.067 ± 0.069	-0.428 ± 0.355	0.043 ± 0.413	-0.599 ± 0.275	-0.553 ± 0.453	-0.850 ± 0.235
Log(C. leptum)	0.155 ± 0.134	0.212 ± 0.156	0.508 ± 0.184	-0.377 ± 0.233	-0.152 ± 0.197	-0.035 ± 0.452
Log(C. coccoides)	0.037 ± 0.082	0.476 ± 0.176	0.503 ± 0.206	0.267 ± 0.226	-0.063 ± 0.347	-0.278 ± 0.850
Log(E. coli)	0.164 ± 0.109	-0.175 ± 0.207	-0.658 ± 0.252	-0.027 ± 0.310	-0.642 ± 0.289	-0.061 ± 0.614
Log(L. salivarius)/ Log(L. crispatus)	0.150 ± 0.159	-0.221 ± 1.545	-0.710 ± 0.965	0.080 ± 1.575	-0.605 ± 1.435	-0.408 ± 0.669
Log(L. salivarius)/ Log(Lactobacillus)	0.067 ± 0.056	0.242 ± 0.304	-0.337 ± 0.324	0.531 ± 0.368	-0.111 ± 0.442	0.041 ± 0.764
Log(L. salivarius)/ Log(C. leptum)	0.080 ± 0.100	-0.095 ± 0.531	-0.391 ± 0.499	0.307 ± 0.601	-0.285 ± 0.671	-0.579 ± 0.319
Log(L. salivarius)/ Log(C. coccoides)	0.019 ± 0.044	-0.180 ± 0.741	-0.391 ± 0.767	0.075 ± 0.835	-0.501 ± 0.799	-0.736 ± 0.391
Log(L. salivarius)/ Log(E. coli)	0.057 ± 0.065	0.202 ± 0.602	0.691 ± 0.414	0.067 ± 0.664	0.505 ± 0.604	-0.302 ± 0.738
Log(L. crispatus)/ Log(Lactobacillus)	0.179 ± 0.108	0.651 ± 0.389	0.958 ± 0.151	0.340 ± 0.538	0.780 ± 0.323	0.483 ± 0.469
Log(L. crispatus)/ Log(C. leptum)	0.077 ± 0.049	0.192 ± 0.663	0.756 ± 0.428	-0.036 ± 0.688	0.342 ± 0.616	-0.278 ± 0.599
Log(L. crispatus)/ Log(C. coccoides)	0.136 ± 0.077	0.233 ± 0.499	0.803 ± 0.297	-0.064 ± 0.575	0.410 ± 0.479	-0.044 ± 0.570
Log(L. crispatus)/ Log(E. coli)	0.235 ± 0.094	0.102 ± 0.378	0.694 ± 0.295	-0.111 ± 0.425	0.522 ± 0.481	-0.044 ± 0.681
Log(C. leptum)/ Log(Lactobacillus)	0.086 ± 0.065	0.575 ± 0.311	0.274 ± 0.292	0.367 ± 0.274	0.494 ± 0.431	0.960 ± 0.282
Log(C. leptum)/ Log(C. coccoides)	0.126 ± 0.136	-0.346 ± 0.611	0.069 ± 0.525	-0.754 ± 0.477	-0.213 ± 0.715	-0.053 ± 0.568
Log(C. leptum)/ Log(E. coli)	0.207 ± 0.055	0.168 ± 0.238	0.702 ± 0.226	-0.172 ± 0.284	0.528 ± 0.257	0.043 ± 0.520
Log(C. coccoides)/ Log(Lactobacillus)	0.102 ± 0.058	0.638 ± 0.151	0.116 ± 0.184	0.758 ± 0.392	0.559 ± 0.460	0.749 ± 0.523
Log(C. coccoides)/Log(E. coli)	0.156 ± 0.076	0.294 ± 0.369	0.765 ± 0.271	0.045 ± 0.403	0.674 ± 0.302	0.142 ± 0.352
Log(E. coli)/ Log(Lactobacillus)	0.208 ± 0.135	0.021 ± 0.461	-0.597 ± 0.399	0.223 ± 0.486	-0.380 ± 0.426	0.258 ± 0.597

Bold values are significantly different from 0 (P<0.05)

¹ AMEn: metabolisable energy corrected to zero nitrogen retention; CDUDM, CDUS, CDUL, CDUP: coefficients of fecal digestive use of dry matter, starch, lipids and proteins