Males of Caenorhabditis elegans provide a crucial practical tool in the laboratory, but, as the
rarer and more finicky sex, have not enjoyed the same depth of research attention as …

Biologists have long appreciated natural variation in the nematode phylum. The
development of Caenorhabditis elegans as a model organism has provided a rich set of …

Studies of model organisms have provided important insights into how natural genetic
differences shape trait variation. These discoveries are driven by the growing availability of …

When gene regulatory networks diverge between species, their dysfunctional expression in
inter-species hybrid individuals can create genetic incompatibilities that generate the …

Abstract Entomopathogenic nematodes (EPNs), including Heterorhabditis and Steinernema,
are parasitic to insects and contain mutualistically symbiotic bacteria in their intestines …

Factors shaping the distribution and abundance of species include life‐history traits,
population structure, and stochastic colonization–extinction dynamics. Field studies of model …

The diversity in sperm shape and size represents a powerful paradigm to understand how
selection drives the evolutionary diversification of cell morphology. Experimental work on the …

Background Pseudogamy is a reproductive system in which females rely on the sperm of
males to activate their oocytes, generally parasitizing males of other species, but do not use …

Background Biotic interactions are ubiquitous and require information from ecology,
evolutionary biology, and functional genetics in order to be understood. However, study …

Asymmetric partitioning is an essential component of many developmental processes. As
spermatogenesis concludes, sperm are streamlined by discarding unnecessary cellular …