A 12,000 rad whole genome radiation hybrid panel for high resolution mapping in cattle: characterization of the centromeric end of chromosome 1

We have constructed a 12,000 rad bovine whole-genome radiation hybrid panel (BovR12) to complement the 5000 rad panel (BovR5) currently available to the bovine genomics research community. Initial characterization with markers from chromosome 1 reveals a higher frequency of breakage between adjacent markers and subsequently a larger number of 'linkage' groups on this chromosome. For this set of markers, the retention frequency is also higher than in BovR5.