TABLE 3

QTL affecting copulation occurrence and latency between D. yakuba and D. santomea

BC crossTraitQTLPeakLREffectEffect/σpR2
F1 females × D. santomea malesBC female mating to D. yakuba male1A–3B4B13.42−0.21−9.520.0225
82A–88B85E48.21−0.30−14.060.0908
F1 females × D. santomea malesLatency to BC female mating D. yakuba male7D–16D10E11.814.910.420.0439
F1 females × D. yakuba malesBC male mating to D. santomea female48D–50D48A10.22−0.16−7.440.0188
68A–73E69A12.73−0.16−7.600.0200
97D–95C96E14.67−0.16−7.220.0231
• QTL regions are estimated from 2 LOD support intervals (P ≤ 0.05) and the cytological locations were extrapolated from recombination rate between markers in comparison to the D. yakuba cytological map. The peak is the cytological location with the highest likelihood ratio (LR). Effects were estimated from the least-squares means of the two genotype classes as [homozygous − heterozygous] and are also given scaled by the phenotypic standard deviation (σp). R2 is the proportion of the variance accounted for the QTL and is estimated by , where s2 is the variance of the trait, is the sample variance of the residuals, and is the variance of the residuals (Basten et al. 1999).