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http://d.hatena.ne.jp/QTL_chicken/20091006/1254834621

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plotLodProfile(rqtl, xlab="Chromosome 1", ylab="LOD score")

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traitx <- read.cross("csv", ".", "traitx.csv")

traitx <- calc.genoprob(traitx, step=1, error.prob=0.01, map.function=c("kosambi"))

qtl <- makeqtl(traitx, chr=c(1, 2), pos=c(120, 220), what="prob")

rqtl1 <- refineqtl(traitx, qtl=qtl, formula=y~Q1+Q2, verbose=TRUE, keeplodprofile=TRUE, method="hk")

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traity <- read.cross("csv", ".", "traity.csv")

traity <- calc.genoprob(traity, step=1, error.prob=0.01, map.function=c("kosambi"))

qtl <- makeqtl(traity, chr=c(1, 2), pos=c(120, 220), what="prob")

rqtl2 <- refineqtl(traity, qtl=qtl, formula=y~Q1+Q2, verbose=TRUE, keeplodprofile=TRUE, method="hk")

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plotLodProfile(rqtl1, xlab="Chromosome 1", ylab="LOD score", ylim=c(0, 10), chr=c(1, 2), col="red", lty=1)

plotLodProfile(rqtl2, xlab="Chromosome 1", ylab="LOD score", chr=c(1, 2), col="red", lty=2, add=TRUE, qtl.labels=FALSE)

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qtl <- makeqtl(traity, chr=c(1, 2, 3), pos=c(120, 220, 300), what="prob")

rqtl2 <- refineqtl(traity, qtl=qtl, formula=y~Q1+Q2+Q3+Q1*Q3, verbose=TRUE, keeplodprofile=TRUE, method="hk")

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