Quantitative trait loci affecting lactose and total solids on chromosome 6 in Brazilian Gir dairy cattle.

• Autor(a) principal: SILVA, A. A.
• Data de Publicação: 2011
• Outros Autores: 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.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
• Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/910305; http://dx.doi.org/10.4238/2011.October.31.15
• topic: Daughter design; Cattle genome; Bos Indicus; dairy cattle

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.