Abstract
A genetic map of bovine chromosome 10 was constructed from 10 microsatellite markers and one erythrocyte antigen that were scored in a reciprocal backcross and F2 Angus x Brahman beef cattle population. The sex averaged map length is 89.7cM or approximately 3.2% of the estimated 28OOcM genome length. The markers had heterozygosity values ranging from 0.36 to 0.87 and PIC values ranging from 0.39 to 0.83. An interval mapping analysis using regression methods was used to search for quantitative trait loci (QTLS) on bovine chromosome 10. A quantitative trait locus affecting relative ribeye area (RREA) was found on chromosome 10. There was an indication of possible QTLs affecting ribeye area (REA), Wamer-Bratzler shear force (WBSF), dressing percentage (DP) and quality grade (QG), although the minimum significance level was not attained. The magnitude of QTL effects for RREA, REA, WB SF, DP and QG were 0. 69, 0.63, 0.42, 0.22 and 0. 5 1 phenotypic standard deviations, respectively. All five traits except RREA exhibited some degree of dominance effect.
Lutaaya, Emmanuel (1996). Mapping and analysis of quantitative trait loci in Bos indicus x Bos Taurus cattle: chromosome 10. Master's thesis, Texas A&M University. Available electronically from
https : / /hdl .handle .net /1969 .1 /ETD -TAMU -1996 -THESIS -L88.