Table 2.
Genomic relationship matrix (G) calculated and employed in the prediction of calving difficulty
| Model/G | BASE | TOP25 | BOT75 | NET | CONN | FREE |
|---|---|---|---|---|---|---|
| Model-1 | X | . | . | . | . | . |
| Model-2 | . | X | . | . | . | . |
| Model-3 | . | X | X | . | . | . |
| Model-4 | . | . | . | X | . | . |
| Model-5 | . | . | . | X | . | X |
| Model-6 | . | . | . | . | X | . |
| Model-7 | . | . | . | . | X | X |
BASE was a general genomic relationship matrix was used as reference method and built on the whole set of markers. Markers were then gathered if ranking among the top 25% for proportion of genetic variance explained for at least three of the six traits considered, a genomic relationship matrix was built on these markers (TOP25) as well as on the remaining markers (BOT75). A genomic relationship matrix was constructed by including only the markers that were in proximity of a gene and therefore included in the network (NET) or all the remaining markers (FREE). Matrix CONN included NET markers also accounting for AWM correlations among markers (genes)