Navegando por Autor "Azevedo, A.L.S."

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    Quantitative trait loci affecting lactose and total solids on chromosome 6 in Brazilian Gir dairy cattle
    (Genetics and Molecular Research, 2011-10-31) Silva, A.A.; Azevedo, A.L.S.; Gasparini, K.; Verneque, R.S.; Peixoto, M.G.C.D.; Panetto, B.R.; Guimarães, S.E.F.; Machado, M.A.
    Fourteen Brazilian Gir sire families with 657 daughters were analyzed for quantitative trait loci (QTL) on chromosome 6 affecting lactose and total solids. Cows and sires were genotyped with 27 microsatellites with a mean spacing between markers of 4.9 cM. We used a 1% chromosome-wide threshold for QTL qualification. A QTL for lactose yield was found close to marker MNB66 in three families. A QTL for total solid yield was identified close to marker BMS2508 in three families. A QTL for lactose percentage, close to marker DIK1182, was identified in two families. A QTL for total solid percentage, close to marker MNB208, was identified in four families. These QTLs could be used for selection of animals in dairy production systems.