Abstract
Five Charolais families known to segregate for both horned and polled were selected and tested for linkage analysis by use of microsatellites and karyotyping for Robertsonian translocation 1;29. No recombinants were found between any of these markers and the polled phenotype or each other. When statistical analysis was performed, the logarithm of the odds (LOD) indicated that there was 100% linkage occurring between the markers and the phenotype (p<0.001). These microsatellite markers, TGLA49 and BM6438, can be assumed to be very close to the actual gene that determines the polled phenotype. Another linked marker, SOD1, was physically mapped, which places all of these markers within 1q12–14, very near the centromere of Chromosome (Chr) 1. A homozygous polled cow was identified in this study by following the alleles at both markers and the phenotypes in her family.
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Schmutz, S.M., Marquess, F.L.S., Berryere, T.G. et al. DNA marker-assisted selection of the polled condition in Charolais cattle. Mammalian Genome 6, 710–713 (1995). https://doi.org/10.1007/BF00354293
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DOI: https://doi.org/10.1007/BF00354293