title: Quantitative trait loci affecting lactose and total  solids on chromosome 6 in Brazilian Gir dairy cattle.
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.
authors: Departamento de Zootecnia, Universidade Federal de Viçosa, Viçosa, MG, Brasil.
authors: A A
authors: AA
authors: Silva
authors: A L S
authors: AL
authors: Azevedo
authors: K
authors: K
authors: Gasparini
authors: R S
authors: RS
authors: Verneque
authors: M G C D
authors: MG
authors: Peixoto
authors: B R
authors: BR
authors: Panetto
authors: S E F
authors: SE
authors: Guimarães
authors: M A
authors: MA
authors: Machado
mesh_terms: D000483:Alleles; D000818:Animals; D001938:Brazil; D001947:Breeding; D002417:Cattle / Q000235:genetics*; D033481:Chromosomes, Mammalian / Q000235:genetics*; D003612:Dairying; D005260:Female; D005819:Genetic Markers; D005838:Genotype; D006579:Heterozygote; D007785:Lactose / Q000235:genetics*; D008297:Male; D008892:Milk / Q000378:metabolism*; D040641:Quantitative Trait Loci / Q000235:genetics*
chemical_list: D005819:Genetic Markers; D007785:Lactose