Journal
ELIFE
Volume 8, Issue -, Pages -Publisher
ELIFE SCIENCES PUBLICATIONS LTD
DOI: 10.7554/eLife.43606
Keywords
-
Categories
Funding
- European Research Council
- Human Frontier Science Program [LT000783/2010-L]
- Deutsche Forschungsgemeinschaft [WE 2897/4-2]
- Max-Planck-Gesellschaft
Ask authors/readers for more resources
Genetic drift is expected to remove polymorphism from populations over long periods of time, with the rate of polymorphism loss being accelerated when species experience strong reductions in population size. Adaptive forces that maintain genetic variation in populations, or balancing selection, might counteract this process. To understand the extent to which natural selection can drive the retention of genetic diversity, we document genomic variability after two parallel species-wide bottlenecks in the genus Capsella. We find that ancestral variation preferentially persists at immunity related loci, and that the same collection of alleles has been maintained in different lineages that have been separated for several million years. By reconstructing the evolution of the disease-related locus MLO2b, we find that divergence between ancient haplotypes can be obscured by referenced based re-sequencing methods, and that trans-specific alleles can encode substantially diverged protein sequences. Our data point to long-term balancing selection as an important factor shaping the genetics of immune systems in plants and as the predominant driver of genomic variability after a population bottleneck.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available