Evo-devo of the germline and somatic gonad in nematodes.

Due to recent progress in the development of genetic tools, nematodes have become excellent models to address the mechanistic basis of evolution of development. The gonad is one of the most variable structures in nematodes, reflecting the diverse modes of reproduction and lifestyle in this phylum. During larval development, the gonad primordium has a key role in organizing the neighboring tissues. Therefore, changes in the development of the gonad do not only influence the evolution of its morphology but also the overall body plan of the nematode. Here, we review recent progress on the evolution of development of the germline and somatic gonad in nematodes.