The RH X chromosome marker order and orientation was generally in agreement with the X chromosome assembly. However, 15 out of 84 markers from the BovGen RH map and 18 out of 93 markers from the SUNbRH7000-rad map suggested a possible assembly error. Comparison of the RH maps showed that 5 markers from BovGen RH map and 4 markers from SUNbRH7000-rad map had a consistent arrangement that differed from the Brahman X assembly. Both RH maps showed an inversion of a 1,286,607 bp contig in a scaffold that is made up of 4 contigs. With the exception of this scaffold, other RH marker inconsistencies would have required contigs to be broken and rearranged. The Brahman X and ARS-UCD1.2 X agreed in all these regions so the order and orientation of scaffolds that agreed best with Hi-C and optical map was retained.
Outside of the PAR, the Y chromosome assembly is made up of small scaffolds with average length of 98,509 bp. The ordering of scaffolds was completely dependent on the 52 RH markers and no contig breaks were required.
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