1. Quantitative trait loci affecting lactose and total solids on chromosome 6 in Brazilian Gir dairy cattle
- Author
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Simone Eliza Facioni Guimarães, K. Gasparini, Ana Luisa Sousa Azevedo, B R Panetto, Rui da Silva Verneque, A.A. Silva, Maysa Machado, and Maria Gabriela Campolina Diniz Peixoto
- Subjects
Genetic Markers ,Male ,Heterozygote ,Genotype ,Quantitative Trait Loci ,Lactose ,Bos indicus ,Daughter design ,Breeding ,Quantitative trait locus ,Biology ,chemistry.chemical_compound ,Animal science ,Cattle genome ,Genetics ,Animals ,Dairy cattle ,Molecular Biology ,Alleles ,Sire ,food and beverages ,General Medicine ,Total dissolved solids ,Chromosomes, Mammalian ,Dairying ,Milk ,chemistry ,Genetic marker ,Microsatellite ,Cattle ,Female ,Brazil - Abstract
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.
- Published
- 2011