Data from: Male-biased fitness effects of spontaneous mutations in Drosophila melanogaster

Data on the fitness of different lines, following mutation accumulation, for either juveniles, males, or females of that genotype. Group: the trait measured, either juvenile egg-to-adult viability, male reproductive success, or female reproductive success. MA_generation: the number of generations since lines were initiated; juvenile fitness was assessed at 16, 30, and 46, adult traits at 52. Treatment: whether the replicate is of a line that underwent mutation accumulation (mutant), or is from one of three control populations (controlX, controlY, controlZ). Line: an arbitrary replicate number, i.e. a mutant or control genotype. Note that mutant lines are consistent across generations, whereas control genotypes in a given generation are independent of those in another generation. Offspring: a measure of fitness. For juveniles, the number of focal individuals emerging as adults, in the presence of standard competitors. For adults (males, females), the number of offspring sired/produced in the presence of standard competitors.