Université de Neuchâtel

Evolution of moonwort ferns ("Botrychium", Ophioglossaceae) on local to global scales

Dauphin, Benjamin ; Grant, Jason (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2017.

Les plantes ont depuis longtemps fasciné les biologistes par leur capacité à former des espèces cryptiques, des hybrides entre des espèces distinctes, de grandes tailles de génomes stables, et une large variété de systèmes reproducteurs parmi les taxons qui ont conduit à l’actuelle biodiversité des plantes. Il y a plus de 450 millions d’années, les plantes vasculaires ont émergé...

Accès public à partir du 1 déc. 2018
Université de Neuchâtel

Rapid allopolyploid radiation of moonwort ferns (Botrychium; Ophioglossaceae) revealed by PacBio sequencing of homologous and homeologous nuclear regions

Dauphin, Benjamin ; Grant, Jason R ; Farrar, Donald R ; Rothfels, Carl J

In: Molecular Phylogenetics and Evolution, 2018, vol. 120, p. 342-353

Polyploidy is a major speciation process in vascular plants, and is postulated to be particularly important in shaping the diversity of extant ferns. However, limitations in the availability of bi-parental markers for ferns have greatly limited phylogenetic investigation of polyploidy in this group. With a large number of allopolyploid species, the genus Botrychium is a classic example in...

Université de Neuchâtel

Molecular phylogenetics supports widespread cryptic species in moonworts (Botrychium s.s., Ophioglossaceae)

Dauphin, Benjamin ; Vieu, Julien ; Grant, Jason R

In: American Journal of Botany, 2014, vol. 101, no. 1, p. 128–140

Premise of the study: Previous phylogenetic studies of moonworts (Botrychium sensu stricto (s.s.)) included few taxa from outside of North America. This low geographical representation limited interpretations of relationships of this group rich in cryptic species. With 18 out of 30 species in the genus being polyploid, understanding their evolutionary history remains a major challenge....

Université de Fribourg

Ploidy level and genome size variation in the homosporous ferns Botrychium

Dauphin, Benjamin ; Grant, Jason ; Mráz, Patrik

In: Plant Systematics and Evolution, 2016, vol. 302, no. 5, p. 575–584

Recent cytological and molecular studies have investigated genome size variation and evolution in the homosporous ferns, but representatives of the Ophioglossaceae were largely overlooked, despite their evolutionary singularity. Flow cytometry analysis was performed on 41 individuals of eight species of the genera Botrychium (B.), Botrypus, and Sceptridium to estimate their ploidy level...