Abstract Detail

Phylogenomics

Angulo, Juan [1], Wickett, Norman [2], Pokorny, Lisa [3], Johnson, Matt [4], Medina, Rafael [5], Goffinet, Bernard [6], Shaw, Jonathan [7], Liu, Yang [8].

Reconstructing the rapid radiation of pleurocarpous mosses using 802 nuclear genes.

Understanding the evolutionary history of mosses is essential for a comprehensive picture of land plant diversification, yet a substantial portion of the moss tree of life remains unresolved. In particular, pleurocarpous mosses (Hypnanae) represent a recalcitrant group with regard to reconstructing relationships. Pleurocarps are characterized by the development of gametangia on short, lateral branches. Their split from their most recent common ancestor, shared with cladocarpous mosses, was accompanied by major and rapid bouts of diversification, leading to over 5200 extant species that are distributed worldwide, and comprising 40–50% of all moss species. Despite several previous phylogenetic analyses, current hypotheses of relationships based on molecular data suggest that families and genera within Hypnanae are abundantly polyphyletic. This is undoubtedly due to the fact that the events that established major extant lineages occurred in rapid succession, well over 100 Mya. Without an accurate circumscription of major lineages in Hypnanae, phylogenetic analyses within families may exclude close relatives, while inadvertently including distantly related taxa. Furthermore, the number and timing of critical evolutionary transitions in the group may be falsely inflated or deflated in the face of an inaccurate hypothesis of relationships. Here, we present a phylogenomic approach that uses 802 nuclear genes of 368 species representing all major clades within Hypnanae. Our aim is to provide resolution of the macroevolutionary relationships across the superorder that will put in place the framework needed in order to examine finer scale generic and species relationships.

1 - University of Georgia, Department of Plant Biology, 360 Barber St, Athens, GA, 30601, United States
2 - Chicago Botanic Garden, 1000 Lake Cook Rd., Glencoe, IL, 60022, United States
3 - Centre For Plant Biotechnology And Genomics UPM-INIA, Computational/Systems Biology And Genomics Program, Autopista M-40, Km 38, Pozuelo De Alarcón, 28223, Spain
4 - Texas Tech University, Biological Sciences, 2901 Main Street, Ms3131, Lubbock, TX, 79409, United States
5 - Augustana College, Biology, 639 38th Street, Department Of Biology. Augustana College, Rock Island, IL, 61201, United States
6 - University Of Connecticut, Department Of Ecology & Evolutionary Biology, 75 N. Eagleville Road, U-3043, Storrs, CT, 06269, United States
7 - Duke University, Biology, 130 Science Drive, Box 90338, Durham, NC, 27708, United States
8 - Fairy Lake Botanical Garden, Shenzhen, China

Keywords:
moss
Hypnanae
phylogenomics.

Presentation Type: Poster
Session: P, Phylogenomics Posters
Location: Virtual/Virtual
Date: Wednesday, July 29th, 2020
Time: 5:00 PM Time and date to be determined
Number: PPL004
Abstract ID:605
Candidate for Awards:None