Drosophila: Drosophila datasets and QTL mapping study

Description Usage Format Details Source Examples

Description

Two datasets with genotypes and phenotypes for backcrossed Drosophilas.

Usage

1

Format

Two datasets with genotypes and phenotypes for backcrossed Drosophilas.

The set of 41 markers describes genotypes while 5 variables describe phenotypes. See references for more details.

bm

A data.frame with 370 obs. and 46 variables, first 41 are genotypes of gene markers, last five describes genotypes

bs

A data.frame with 402 obs. and 46 variables, first 41 are genotypes of gene markers, last five describes genotypes

chr

Factor w/ 4 levels CBFbeta, FLT3, None, Other

pos

Markers position on chromosom in centimorgnas

Details

The phonotype pc1 is nicely described by genotype in both backcrossed datasets.

Source

Genetic Architecture of a Morphological Shape Difference Between Two Drosophila Species Zhao-Bang Zenga, Jianjun Liu, Lynn F. Stamb, Chen-Hung Kao, John M. Mercer, Cathy C. Laurie Genetics, Vol. 154, 299-310, January 2000

Examples

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data(Drosophila)
library(lattice)
# calculate log likelihoods
pval1 = numeric(41)
for (i in 1:41) {
  y = Drosophila$bm$pc1
  x = factor(Drosophila$bm[,i])
  pval1[i] = logLik(lm(y~x))
}
# loglikelihood plot
xyplot(pval1~pos|chr, data=Drosophila, type=c("p","l"), 
     pch=19, ylab="log likelihood")

PBImisc documentation built on May 29, 2017, 5:53 p.m.