HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Complex heterochrony underlies the evolution of Caenorhabditis elegans hermaphrodite sex allocation

Abstract : Hermaphroditic organisms are key models in sex allocation research, yet the developmental processes by which hermaphrodite sex allocation can evolve remain largely unknown. Here we use experimental evolution of hermaphrodite-male (androdioecious) Caenorhabditis elegans populations to quantify the developmental changes underlying adaptive shifts in hermaphrodite sex allocation. We show that the experimental evolution of increased early-life self-fertility occurred through modification of a suite of developmental traits: increased self-sperm production, accelerated oogenesis and ovulation, and increased embryo retention. The experimental evolution of increased self-sperm production delayed entry into oogenesis-as expected, given the sequentially coupled production of self-spermatogenesis and oogenesis. Surprisingly, however, delayed oogenesis onset did not delay reproductive maturity, nor did it trade-off with gamete or embryo size. Comparing developmental time dynamics of germline and soma indicates that the evolution of increased sperm production did not delay reproductive maturity due to a globally accelerated larval development during the period of self-spermatogenesis. Overall, heterochrony in gametogenesis and soma can explain adaptive shifts in hermaphrodite sex allocation.
Document type :
Journal articles
Complete list of metadata

https://hal.inrae.fr/hal-02629987
Contributor : Migration Prodinra Connect in order to contact the contributor
Submitted on : Wednesday, May 27, 2020 - 4:40:44 AM
Last modification on : Thursday, March 17, 2022 - 10:08:41 AM

Links full text

Identifiers

Collections

Citation

Nausicaa Poullet, Anne Vielle, Clotilde Gimond, Sara Carvalho, Henrique Teotonio, et al.. Complex heterochrony underlies the evolution of Caenorhabditis elegans hermaphrodite sex allocation. Evolution - International Journal of Organic Evolution, Wiley, 2016, 70 (10), pp.2357-2369. ⟨10.1111/evo.13032⟩. ⟨hal-02629987⟩

Share

Metrics

Record views

7