Abstract Detail

Phylogenomics and evolution of Superrosids

Ma, Hong  [1], Li, Hao [2], Huang, Chien-Hsun [3].

Phylotranscriptomics in Rosaceae and evolutionary implications on fruit type and regulatory genes .

Angiosperms are characterized by the production of fruits, which serve to protect developing seeds and subsequently facilitate seed dispersal. Fruit are also major food sources for humans and other animals and are classified into many morphological types. The Rosaceae family has ~3000 species and its members produce an unusually large number of distinct fruit types, including dry achenetum and follicetum and fleshy drupe, pome and drupetum, providing an excellent system for evolutionary studies of fruit types. We have recently generated a nuclear-gene Rosaceae phylogeny using hundreds of low-copy genes from over 120 species with highly supported monophyly of all subfamilies and tribes and well-resolved relationships among these lineages. In addition, phylotranscriptomic analysis detected strong evidence for several whole genome duplications (WGDs); further comparative analysis with apple and pear genomic sequences indicate that a genome duplication event supported by extensive collinear genomic regions is likely shared by members of the apple subtribe (Malinae), which produce pome-type fleshy fruits or morphologically similar types, suggesting that this ancient polyploid event might have contributed to the increased diversification of this subtribe. Moreover, duplicate genes retained following the apple subtribe WGD include several key regulatory genes involved in pome fruit development, as well as other potential regulators, providing a potential mechanistic link between gene duplication from the WGD and morphological innovation. The analysis of Rosaceae phylogenetic, WGDs and fruit type evolution in the context of climate changes over geological times provide clues about how WGDs and environmental factors, including animals, could have contributed to the evolution of the many fruit types in Rosaceae.

Related Links:
Plant Love Stories
Kuebbing Lab Webpage

1 - Dept Biology, 510 Mueller Lab-Penn State Univ, University Park, PA, 16802, United States
2 - the Pennsylvania State University, Biology, 510 Mueller Lab, the Huck Institutes of the Life Sciences, University Park, PA, 16802, USA
3 - Fudan University, Institute of Plant Biology, Center of Evolutionary Biology, School of Life Sciences, Shanghai 200433, China

Molecular phylogeny
ancestral character estimation
transcription factors
Whole-genome duplication
pome fruit.

Presentation Type: Colloquium Presentations
Session: COL07, Phylogenomics and evolution of superrosids
Location: Virtual/Virtual
Date: Wednesday, July 29th, 2020
Time: 4:30 PM
Number: COL07006
Abstract ID:352
Candidate for Awards:None

Copyright © 2000-2020, Botanical Society of America. All rights reserved