Frequencies of fleece color genes were evaluated in Italian Merino-crossbred Upper Visso sheep. Assuming panmixy, the frequencies of alleles at the A (Agouti), B (Brown) and S (Spotting) loci have been calculated in 1328 viable lambs, born by 90 rams and 1384 ewes in 4 flocks. The frequencies are: Awt = 0.866±0.014; Aa = 0.134±0.014; Bb = 0.204±0.100; B+ = 0.796±0.100; Ss = 0.998±0.000; S+ = 0.002±0.000. At the locus E (Extension) the dominant epistatic allele Ed was not found. The frequency of Aa, the only mutant existing at locus A besides Awt, is higher than in other Merino crossbreds.
Frequencies of fleece color genes in Upper Visso sheep
PIERAMATI, Camillo;OLIVIERI, Oliviero;TRABALZA MARINUCCI, Massimo;
1989
Abstract
Frequencies of fleece color genes were evaluated in Italian Merino-crossbred Upper Visso sheep. Assuming panmixy, the frequencies of alleles at the A (Agouti), B (Brown) and S (Spotting) loci have been calculated in 1328 viable lambs, born by 90 rams and 1384 ewes in 4 flocks. The frequencies are: Awt = 0.866±0.014; Aa = 0.134±0.014; Bb = 0.204±0.100; B+ = 0.796±0.100; Ss = 0.998±0.000; S+ = 0.002±0.000. At the locus E (Extension) the dominant epistatic allele Ed was not found. The frequency of Aa, the only mutant existing at locus A besides Awt, is higher than in other Merino crossbreds.File in questo prodotto:
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