Intracellular symbionts and the evolution of uniparental cytoplasmic inheritance
- 22 April 1992
- journal article
- Published by The Royal Society in Proceedings Of The Royal Society B-Biological Sciences
- Vol. 248 (1321), 69-77
- https://doi.org/10.1098/rspb.1992.0044
Abstract
Uniparental inheritance of cytoplasmic elements is widespread among eukaryotic organisms and is achieved by a diverse range of mechanisms. This paper shows that the cytoplasmic genetic system would be expected to evolve towards uniparental inheritance, given the existence of deleterious symbionts capable of invading the host cytoplasm together with nuclear genes that lead to the elimination of cytoplasmic elements from one of the gamete types. The reason for this is that, under biparental inheritance, foreign symbionts with strong deleterious effects are able to spread through host populations. A nuclear modifier gene which leads to the loss of cytoplasmic elements from one gamete type gains a net advantage as a symbiont spreads, because the modifier sometimes gives rise to a symbiont-free zygote. Insofar as small gametes reduce the rate of symbiont transmission to the zygote, modifier genes causing small gamete size would tend to accumulate, so that cytoplasmic inheritance would become associated with maternal rather than paternal gametes. Once uniparental inheritance predominates in the host population, the population is protected from invasions by a large class of harmful symbionts, but at the same time those symbionts that benefit their hosts are still able to increase in frequency.Keywords
This publication has 20 references indexed in Scilit:
- Population genetic aspects of deleterious cytoplasmic genomes and their effect on the evolution of sexual reproductionGenetics Research, 1992
- Cytoplasmic fusion and the nature of sexesProceedings Of The Royal Society B-Biological Sciences, 1992
- Paternal inheritance of mitochondrial DNA in miceNature, 1991
- The cytological basis of the plastid inheritance in angiospermsProtoplasma, 1989
- RAPID SCREENING METHOD TO DETECT POTENTIAL BIPARENTAL INHERITANCE OF PLASTID DNA AND RESULTS FOR OVER 200 ANGIOSPERM SPECIESAmerican Journal of Botany, 1988
- The evolution of sexesPublished by Springer Science and Business Media LLC ,1987
- Chloroplast DNA deletions associated with wheat plants regenerated from pollen: possible basis for maternal inheritance of chloroplastsCell, 1984
- Relaxed Cellular Controls and Organelle HeredityScience, 1983
- Reproductive evolution: Mating types and uniparental transmission of chloroplast genesNature, 1983
- Comparative morphology and biology of the fungi, mycetozoa and bacteriaPublished by Smithsonian Institution ,1887