Genomic estimates of inbreeding and coancestry in Austrian Brown Swiss cattle

Abstract Text: In this study, estimates of genomic coancestry based on Identical By Descent (IBD) segments and genomic inbreeding based on Runs Of Homozygosity (ROH) have been obtained as well as genomic estimates for both coancestry and inbreeding computed on a SNP-by-SNP basis and computed on pedigree data.  The corresponding effective population sizes have been calculated from these estimates. N_ethat have been obtained in the present study are rather small whether we used molecular or pedigree measures of inbreeding or coancestry in the calculations. This result highlight the importance of implementing active management strategies to control the rise of inbreeding and coancestry and the loss of genetic diversity in farm animal breeds even if the population census sizes are reasonably large.

Keywords: Genomic inbreeding,Genomic coancestry,Brown Swiss cattle