Rxivist logo

Genetic interaction between two unlinked loci underlies the loss of self-incompatibility in Arabidopsis lyrata

By Yan Li, Mark van Kleunen, Marc Stift

Posted 04 Nov 2019
bioRxiv DOI: 10.1101/830414

As the first step towards the evolution of selfing from obligate outcrossing, identifying the key mutations underlying the loss of self-incompatibility is of particular interest. However, our current knowledge is primarily based on sequence-based comparisons between selfing species and their self-incompatible relatives, which makes it hard to distinguish causal from secondary mutations. To by-pass this problem, we inferred the genetic basis of the loss of self-incompatibility by intercrossing plants from twelve geographically interspersed outcrossing and selfing populations of North-American Arabidopsis lyrata and determining the breeding system of 1,580 progeny. Self-incompatibility was not restored after crosses between different self-compatible populations. Equal frequencies of self-compatible and self-incompatible progeny emerged from crosses between parents with different breeding systems. We propose a two-locus genetic model for the loss of self-incompatibility in which specific S- locus haplotypes ( S1 and S19 ) are associated with loss of self-incompatibility through their interaction with an unlinked modifier.

Download data

  • Downloaded 254 times
  • Download rankings, all-time:
    • Site-wide: 107,141
    • In genetics: 4,586
  • Year to date:
    • Site-wide: 116,032
  • Since beginning of last month:
    • Site-wide: 96,201

Altmetric data

Downloads over time

Distribution of downloads per paper, site-wide