Quantitative genetic analyses for body size and for life history characters within and among
populations of Daphnia obtusa reveal substantial genetic variance at both hierarchical …

Cyclical parthenogens, including aphids, are attractive models for comparing the genetic
outcomes of sexual and asexual reproduction, which determine their respective evolutionary …

Sex in Daphnia is environmentally determined, and some obligately parthenogenetic clones
of D. pulex have retained the ability to produce males. In the present study, males from 13 …

In many plants and animal species, asexuals are more common in marginal habitats such as
high latitudes or altitudes than their closely related sexual counterparts. Here we propose a …

Understanding the source and diversity of clones is necessary to resolve the complicated
issues surrounding the apparent evolutionary stability of sexual reproduction. The source of …

Ploidy-level variation among asexual clones of Daphnia pulex showed a clear latitudinal
pattern. Only a single diploid clone was identified at the high-arctic Igloolik site, and it …

There is growing evidence that transitions from sexual to asexual reproduction are often
provoked by internal genetic factors rather than extrinsic selection pressures. In the …

Despite the enormous theoretical attention given to the evolutionary consequences of
sexual reproduction, the validity of the key assumptions on which the theory depends rarely …

Asexual taxa are short‐lived, suggesting that transitions to asexuality represent evolutionary
dead‐ends. However, with high rates of clonal origin and coexistence of asexuals and …

Some individuals of the cladoceran crustacean, Daphnia pulex, reproduce by cyclic
parthenogenesis, while others are obligate parthenogens. Cyclic parthenogenesis is the …