Abstract Detail

Phylogenomics

Stull, Gregory [1], Tian, Qin [2], Liu, Shui-Yin [2], Fu, Xiao-Gang [1], Kates, Heather [3], Folk, Ryan [4], Guralnick, Robert [5], Soltis, Pamela [6], Soltis, Douglas [7], Yi, Ting-Shuang [8].

A nuclear phylogenomic overview of Rosaceae.

The rose family (Rosaceae: ca. 90 genera and 3000 species) is a morphologically and ecologically diverse angiosperm clade with multiple attributes that make it an attractive system for studying plant evolution, but also a major challenge for phylogeny reconstruction. Both hybridization and polyploidy have been common throughout the evolutionary history of the family. Complex patterns of morphological evolution have frequently undermined taxonomic efforts, such that generic polyphyly is rampant and generic numbers have fluctuated considerably. Apomixis is also ubiquitous in several clades (e.g., Crataegus, Rubus, Sorbus), and alternative treatments of apomictic lineages have led to wildly different estimates of species numbers in the family (ranging from ca. 2500 to 5000). Despite these challenges, nuclear phylogenomic studies are providing increasing clarity on relationships across many areas of Rosaceae phylogeny. However, a comprehensive nuclear phylogeny of Rosaceae, necessary for resolving generic limits and examining macroevolutionary patterns across the family, is currently lacking. We present a densely sampled nuclear phylogenomic framework for Rosaceae, including 86 loci and ca. 2000 species, offering unprecedented insight into both deep and shallow relationships across the family. In addition to outlining major relationships relevant to taxonomy, we will highlight areas of phylogenomic conflict (including cyto-nuclear discordance) and inferred instances of ancient hybridization and polyploidization across the family, and discuss the significance of these processes in shaping broader patterns of Rosaceae evolution. More broadly we discuss the challenges—and benefits—of building a large, species-level nuclear phylogeny in a clade with extensive hybridization, polyploidy, and widespread taxonomic problems.

1 - Kunming Institute of Botany, Germplasm Bank of Wild Species, Kunming, Yunnan Province, China
2 - Kunming Institute of Botany, Chinese Academy of Sciences, Germplasm Bank of Wild Species, Kunming, Yunnan Province, China
3 - University Of Florida, Florida Museum Of Natural History, Dickinson Hall, Gainesville, FL, 32611, United States
4 - Mississippi State University, Biological Sciences, 295 E. Lee Blvd., P.O. Box GY, Mississippi State, MS, 39762, United States
5 - Florida Museum Of Natural History, 358 Dickinson Hall, University O, 358 Dickinson Hall, University Of Florida, Gainesville, FL, 32611, United States
6 - University Of Florida, Florida Museum Of Natural History, Gainesville, FL, 32611.0, United States
7 - University of Florida, Florida Museum of Natural History,, 3215 Hull Road, P. O. Box 2710, Gainesville, FL, 32611, USA
8 - Kunming Institute of Botany, Chinese Academy of Sciences, China

Keywords:
hybridization
phylogenomics
polyploidy
Rosaceae
Rosales
whole genome duplication.

Presentation Type: Oral Paper
Number: PHYLO II011
Abstract ID:810
Candidate for Awards:None