Temperature effects on life-history trade-offs, germline maintenance and mutation rate under simulated climate warming

摘要: Mutation has a fundamental influence over evolutionary processes, but how processes shape mutation rate remains less clear. In asexual unicellular organism, increased rates have been observed in stressful environments and the reigning paradigm ascribes this increase to selection for evolvability. However, explanation does not apply sexually reproducing species, where little is known about environment affects rate. Here we challenged experimental lines of seed beetle, evolved at ancestral temperature or under simulated climate warming, repair induced mutations temperature. Results show that stress causes individuals pass on greater load their grand-offspring. This suggests stress-induced rates, multicellular organisms alike, can result from compromised germline DNA low condition individuals. Moreover, adapted warming had longevity cost reproduction, allocation decision improved repair. These results suggest be modulated by resource trade-offs encompassing life-history traits important implications adaptation extinction as well our understanding genetic diversity organisms.