Abstract Detail

Phylogenomics and evolution of Superrosids

Sun, Miao [1], Folk, Ryan [2], Gitzendanner, Matt [3], Smith, Stephen [4], Chen, Zhiduan [5], Soltis, Pamela [6], Soltis, Douglas [7], Guralnick, Robert [8].

Phylogenetic and diversification analyses of rosids.

The rosid clade (Rosidae) encompasses more than 25% of all extant angiosperms (assuming an estimate of 400,000 angiosperm species) and includes 17 orders and 135 families with enormous ecological and economical importance. Using sequence data in GenBank, we reconstructed the phylogeny of rosids based on a 19,740-taxon, five-locus supermatrix (i.e., atpB, rbcL, matK, matR, and ITS). The topology and divergence times of the five-locus tree generally agree with previous estimates of rosid phylogeny, although we recover greater resolution and support in several areas along the rosid backbone. However, we also note a few significant differences between our five-locus estimate and earlier topologies (e.g., the placement of the COM clade, as well as Myrtales, Vitales, and Zygophyllales). Our five-locus phylogeny is the most comprehensive DNA data set yet compiled for the rosid clade. Nevertheless, even with 19,740 species, current sampling represents only 16-22% of all rosids, and we also find evidence of strong phylogenetic bias in the accumulation of GenBank data, highlighting continued challenges for species coverage. These limitations also exist in other major angiosperm clades (e.g., asterids, monocots), as well as other large, understudied branches of the Tree of Life, illustrating the need for broader molecular sampling. Nevertheless, the phylogeny presented here improves upon rosid sampling by more than two-fold and will be an important resource for macroevolutionary studies of this pivotal clade.

1 - AARHUS UNIVERSITY, BIOSCIENCE, NY MUNKEGADE 114, Jutland, BUILDING 1540, Aahrus, 8000, Denmark
2 - Mississippi State University, 295 E. Lee Blvd., P.O. Box GY, 295 E. Lee Blvd., P.O. Box GY, Mississippi State, MS, 39762, United States
3 - University Of Florida, Florida Museum Of Natural History, Po Box 117800, Gainsville, FL, 32611, United States
4 - 1105 N University Ave, Ann Arbor, MI, 48109, United States
5 - Chinese Academy of Sciences, Institute of Botany, 20 Nanxincun, Xiangshan, Beijing, BJ, 100093, CN
6 - University Of Florida, Florida Museum Of Natural History, Po Box 117800, Gainesville, FL, 32611, United States
7 - University Of Florida, Florida Museum Of Natural History, Dickinson Hall, Gainesville, FL, 32611, United States
8 - University Of Florida, Florida Museum Of Natural History, Gainesville, FL, 32611, USA

Keywords:
Mega-phylogeny
rosids
dating
GenBank
sampling
macroevolution.

Presentation Type: Colloquium Presentations
Session: COL07, Phylogenomics and evolution of superrosids
Location: Virtual/Virtual
Date: Wednesday, July 29th, 2020
Time: 3:30 PM
Number: COL07002
Abstract ID:381
Candidate for Awards:None