Phylogenomics using low-depth whole genome sequencing: A case study with the olive tribe.

Species trees have traditionally been inferred from a few selected markers, and genome-wide investigations remain largely restricted to model organisms or small groups of species for which sampling of fresh material is available, leaving out most of the existing and historical species diversity. The genomes of an increasing number of species, including specimens extracted from natural history collections, are being sequenced at low depth. While these data sets are widely used to analyse organelle genomes, the nuclear fraction is generally ignored.

Prospects on the evolutionary mitogenomics of plants: A case study on the olive family (Oleaceae).

The mitogenome is rarely used to reconstruct the evolutionary history of plants, contrary to nuclear and plastid markers. Here, we evaluate the usefulness of mitochondrial DNA for molecular evolutionary studies in Oleaceae, in which cases of cytoplasmic male sterility (CMS) and of potentially contrasted organelle inheritance are known. We compare the diversity and the evolution of mitochondrial and chloroplast genomes by focusing on the olive complex and related genera.

Mitogenomics of Hesperelaea, an extinct genus of Oleaceae.

The recent developments in high-throughput DNA sequencing allowed major advances in organelle genomics. Assembly of mitochondrial genomes (hereafter mitogenomes) in higher plants however remains a challenge due to their large size and the presence of plastid-derived regions and repetitive sequences. In this study, we reconstructed the first mitogenome of Oleaceae using a herbarium specimen of the extinct genus Hesperelaea collected in 1875.

The joint evolution and maintenance of self-incompatibility with gynodioecy or androdioecy.

Mating systems show two kinds of frequent transitions: from hermaphroditism to dioecy, gynodioecy or androdioecy, or from self-incompatibility (SI) to self-compatibility (SC). While models have mostly investigated these two kinds of transitions as independent, empirical observations suggest that, to some extent, they can evolve jointly. Here, we study the joint evolution and maintenance of SI and androdioecy or SI and gynodioecy by the means of phenotypic models.