This data package contains data from: Lagisz, M., Wen, S.-Y., Routtu, J., Klappert , K., Mazzi, D., Morales-Hojas, R., Schäfer, M.A., Vieira, J., Hoikkala, A., Ritchie, M.G., Butlin, R.K., 2011. Two distinct genomic regions, harbouring the period and fruitless genes, affect male courtship song in Drosophila montana. Heredity. The data is saved as two CSV files separated by comas. There are no special symbols for missing data. Missing data are simply empty cells in the spreadsheed. The data contains phenotypic (male courtship song traits) and genotypic (microsatellite and candidate gene markers) data for two Drosophila montana parental strains (C3F13 from Colorado, US, and O3F66 from Oulanka, Finland) and the reciprocal F1 (F1A, F1B) and F2 crosses (F2AA, F2AB, F2BA, F2BB). 1. Song_data.csv Data collected by: Lagisz, M., Ritchie, M.G., Hoikkala, A., Klappert , K., Mazzi, D. Contact: Malgorzata Lagisz, losialagisz@yahoo.com This dataset contains measurements of song traits (means from 3 measurements per individual) for 3 generations of experimental crossess. The file has following columns: 1) ID - ID code for individuals. 2) GEN - generation code. 3) STRAIN - strain code. 4) FRQ - mean song carrier frequency [Hz]. 5) PN - mean song pulse number per train. 6) PTL - mean song pulse train length [ms]. 7) IPI - mean song inter pulse interval [ms]. 8) PL - mean song pulse length [ms]. 9) CN - mean song cycle number per pulse. 2. QTL_data.csv This dataset contains information on song traits and genotypes at microsatellite and candidate gene markers for males from F3 generation of experimental crossess. Data collected by: Lagisz, M., Wen, S.-Y., Routtu, J., Klappert , K., Mazzi, D., Morales-Hojas, R., Schäfer, M.A., Vieira, J., Hoikkala, A., Ritchie, M.G., Butlin, R.K. Contact: Malgorzata Lagisz, losialagisz@yahoo.com The file has following columns: 1) ID - ID code for individuals. 2) FRQ - mean song carrier frequency [Hz]. 3) PN - mean song pulse number per train. 4) PTL - mean song pulse train length [ms]. 5) IPI - mean song inter pulse interval [ms]. 6) PL - mean song pulse length [ms]. 7) CN - mean song cycle number per pulse. 8) PC1 - first principal component score for song traits. 9) PC2 - second principal component score for song traits. 10) - 55) genotypes for microsatellite and candidate gene markers [A - homozygote with alleles from Oulanka population, B - homozygote with alleles from Colorado population, H - heterozygote]. First row - column labels, including genetic marker names. Second row - marker chromosomal location. Third row - marker position on the chromosome [cM].