Abstract

Temperature is a stress factor that varies temporally and spatially, and can affect the fitness of cold-blooded organisms, leading to a loss of reproductive output; however, little is understood about the genetics behind the long-term response of organisms to temperature. Here, we approach this problem in the model nematode Pristionchus pacificus by utilising a large collection of natural isolates with diverse phenotypes. From this collection we identify two strains, one from California that can give rise to fertile offspring up to 28°C and one from Japan that is fertile up to 30°C. We show that the optimum temperature and the upper temperature limit for fertility is shifted higher in the Japanese strain suggesting that there is a mechanism that controls the temperature response of fertility across a range of temperatures. By crossing the two strains, and using genetic mapping, we identify a region on chromosome V that is responsible for maintaining fertility at higher temperatures. Thus, we conclude that fitness of P. pacificus at high temperature is under genetic control, suggesting that it could be subject to natural selection.

Details

Title
A locus in Pristionchus pacificus that is responsible for the ability to give rise to fertile offspring at higher temperatures
Author
Leaver, Mark; Kienle, Simone; Begasse, Maria L; Sommer, Ralf J; Hyman, Anthony A  VIAFID ORCID Logo 
Pages
1111-1117
Section
RESEARCH ARTICLES
Publication year
2016
Publication date
2016
e-ISSN
20466390
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2760916198
Copyright
© 2016. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.