Darwinian Fitness

The relative probability of survival and reproduction for a genotype B as compared to a genotype A
References in periodicals archive ?
They say this is nothing more than the process of Darwinian fitness, and that we should let natural selection take its course.
Under natural selection, you would expect organisms to use their resources to produce more genetic descendants, and so increase their Darwinian fitness.
This assumption seems likely because both of the aforementioned particular mutations were described in spontaneous mutants of H37Rv obtained in vitro and had a Darwinian fitness slightly less than or equal to that of the rpoB wild-type-susceptible parental strain (9).