Phylogeny and Gene Tree Conflicts in Triticeae Grasses
Author Information
Author(s): Juan S. Escobar, Céline Scornavacca, Alberto Cenci, Claire Guilhaumon, Sylvain Santoni, Emmanuel J.P. Douzery, Vincent Ranwez, Sylvain Glémin, Jacques David
Primary Institution: Institut National de la Recherche Agronomique, Centre de Montpellier, France
Hypothesis
Can a comprehensive multigenic phylogeny be constructed for Triticeae despite gene tree incongruences?
Conclusion
The study provides a comprehensive multigenic phylogeny of Triticeae, clarifying relationships among genera and species while highlighting reticulate evolution.
Supporting Evidence
- The study used the largest dataset to date in Triticeae, analyzing 27 gene fragments.
- Phylogenetic analyses revealed 4-5 major clades within Triticeae.
- Gene-tree incongruences were found to increase with genetic distance.
- Recombination was identified as a significant factor affecting gene-tree conflicts.
Takeaway
Scientists studied a group of grasses to understand their family tree. They found that some parts of the tree are clear, but others are messy because of mixing between species.
Methodology
The study analyzed 19 diploid species from 13 genera of Triticeae using 27 gene fragments, including one chloroplastic and 26 nuclear genes.
Limitations
The study's conclusions may be limited by the number of genes analyzed and the potential for unresolved relationships among some genera.
Participant Demographics
The study included 19 diploid species from various geographic origins including Europe, Middle East, Asia, North America, and Australia.
Statistical Information
P-Value
0.03
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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