Publications by authors named "Claudio de Ulhoa Magnabosco"

Article Synopsis
  • The study focused on examining genome-wide autozygosity in Nellore cattle, analyzing ROH patterns and comparing inbreeding estimates from different methods (ROH, genomic relationship matrix, and pedigree-based coefficients).
  • Results showed that Nellore cattle have moderate to high levels of inbreeding (average 7.15%), with most ROH being short segments, and identified 62 autozygosity islands significantly associated with traits like immune response and growth.
  • The findings suggest that using F (from ROH) is more reliable for measuring ancient inbreeding than traditional pedigree methods, highlighting the impact of selective breeding on important genetic traits in the population.
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The causal mutation for polledness in Nelore (Bos taurus indicus) breed seems to have appeared first in Brazil in 1957. The expression of the polled trait is known to be ruled by a few groups of alleles in taurine breeds; however, the genetic basis of this trait in indicine cattle is still unclear. The aim of this study was to identify genomic regions associated with the hornless trait in a commercial Nelore population.

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The objective of this study was to investigate the application of BLUP and single step genomic BLUP (ssGBLUP) models in different scenarios of paternity uncertainty with different strategies of scaling the G matrix to match the A22 matrix, using simulated data for beef cattle. Genotypes, pedigree, and phenotypes for age at first calving (AFC) and weight at 550 days (W550) were simulated using heritabilities based on real data (0.12 for AFC and 0.

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