Quantitative trait loci affecting lactose and total solids on chromosome 6 in Brazilian Gir dairy cattle.
Quantitative trait loci affecting lactose and total solids on chromosome 6 in Brazilian Gir dairy cattle.
Author(s): SILVA, A. A.; AZEVEDO, A. L. S.; GASPARINI, K.; VERNEQUE, R. da S.; PEIXOTO, M. G. C. D.; PANETTO, B. R.; GUIMARÃES, S. E. F.; MACHADO, M. A.
Summary: 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.
Publication year: 2011
Types of publication: Journal article
Unit: Embrapa Dairy Cattle
Keywords: Bos Indicus, Cattle genome, Daughter design
Observation
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