Most inferred species relationships are well supported across multiple species tree and supermatrix analyses, but discordance among plastid and nuclear gene trees at a few important nodes highlights the complexity of plant genome evolution, including polyploidy, periods of rapid speciation, and extinction.
Studies on chromosomes III. Science60— Tipping points in the dynamics of speciation. We applied our method to a set of newly generated deletion mutants in the dioecious plant Silene latifolia and refined the locations of the sex-determining loci on its Y chromosome map.
However, a scenario of secondary contact vs. Understanding the genetic adaptation of these wild relatives will help plant breeders most effectively use available wild diversity.
Differences in genome size, in particular, can be up to Close banner Close. Schartl M, et al. Most TEs show patchy distribution, indicating multiple events of loss and gain. A sperm—egg incompatibility usually associated with Wolbachia infections. A Stepwise progression, due to inversions or large shifts in recombination hotspots, results in large spatial blocks where the divergence between X—Y or Z—W orthologs is similar.
Interrelationships of the 11 gasterosteiform families sticklebacks, pipefishes, and their relatives : a new perspective based on whole mitogenome sequences from 75 higher teleosts. The X chromosome of Hemipteran insects: conservation, dosage compensation and sex-biased expression.
Schaeffer; Ming Guo; Bruce A. Oxford University Press.
Journal article Chapter. Here, we report the first study of synonymous and nonsynonymous substitution rates on plant sex chromosomes. These genes showed significantly elevated species differentiation FST and Dxy , consistent with diversifying selection acting on these genes.
Our molecular phylogenetic analysis found the presence of positive selection in rbcL of most analyzed land plants, but not in algae and cyanobacteria.