Subtopic Deep Dive

Molecular Phylogeny of Poaceae
Research Guide

What is Molecular Phylogeny of Poaceae?

Molecular phylogeny of Poaceae reconstructs evolutionary relationships among grass species using DNA sequences from nuclear and chloroplast genomes to resolve subfamilies and tribes.

Studies employ multi-gene datasets and genome-scale phylogenomics to build trees for Poaceae, which includes over 12,000 species. Key works like Grass Phylogeny Working Group II (2011) resolved deep relationships and C4 origins (520 citations). Approximately 10 major papers from 2004-2018 provide foundational genomic data from model grasses.

Curated Papers

Key Challenges

Why It Matters

Molecular phylogeny clarifies grass diversification, aiding crop breeding and conservation; Vogel (2010) genome of Brachypodium distachyon (1943 citations) serves as reference for Pooideae evolution. Bennetzen et al. (2012) Setaria genome (962 citations) informs panicoid grasses central to agriculture. Grass Phylogeny Working Group II (2011) phylogeny guides systematic revisions for biodiversity amid climate change and invasions (te Beest et al., 2011, 907 citations).

Key Research Challenges

Incomplete lineage sorting

Rapid radiations in Poaceae cause gene tree discordance, complicating species trees. Grass Phylogeny Working Group II (2011) addressed deep nodes but noted conflicts in early divergences. Multispecies coalescent models are needed for resolution.

Polyploidy network inference

Frequent allopolyploidy in grasses like bamboos creates reticulate evolution beyond trees. Peng et al. (2013) moso bamboo genome (606 citations) reveals polyploid origins. Distinguishing hybridization from incomplete sorting remains difficult.

Sparse taxon sampling

Genomic data covers few of Poaceae's 12,000 species, biasing inferences. Brochmann et al. (2004) highlighted polyploidy in arctic grasses (605 citations), but global sampling lags. Dense matrices are required for robust classifications.

Essential Papers

Genome sequencing and analysis of the model grass Brachypodium distachyon

John P. Vogel · 2010 · Nature · 1.9K citations

Reference genome sequence of the model plant Setaria

Jeffrey L. Bennetzen, Jeremy Schmutz, Hao Wang et al. · 2012 · Nature Biotechnology · 962 citations

We generated a high-quality reference genome sequence for foxtail millet (Setaria italica). The ∼400-Mb assembly covers ∼80% of the genome and >95% of the gene space. The assembly was anchored to a...

The more the better? The role of polyploidy in facilitating plant invasions

Mariska te Beest, Johannes J. Le Roux, David M. Richardson et al. · 2011 · Annals of Botany · 907 citations

Polyploidy can be an important factor in species invasion success through a combination of (1) 'pre-adaptation', whereby polyploid lineages are predisposed to conditions in the new range and, there...

The draft genome of the fast-growing non-timber forest species moso bamboo (Phyllostachys heterocycla)

Zhenhua Peng, Ying Lü, Lubin Li et al. · 2013 · Nature Genetics · 606 citations

Bamboo represents the only major lineage of grasses that is native to forests and is one of the most important non-timber forest products in the world. However, no species in the Bambusoideae subfa...

Polyploidy in arctic plants

Christian Brochmann, Anne K. Brysting, Inger Greve Alsos et al. · 2004 · Biological Journal of the Linnean Society · 605 citations

The Arctic is an excellent model system for the study of polyploidy. It is one the Earth's most polyploid-rich areas, in particular of high-level and recently evolved polyploids. Here we re-address...

New grass phylogeny resolves deep evolutionary relationships and discovers C<sub>4</sub> origins

Grass Phylogeny Working Group II · 2011 · New Phytologist · 520 citations

Summary Grasses rank among the world’s most ecologically and economically important plants. Repeated evolution of the C 4 syndrome has made photosynthesis highly efficient in many grasses, inspirin...

Genetic Diversity and Conservation Units: Dealing With the Species-Population Continuum in the Age of Genomics

David Coates, Margaret Byrne, Craig Moritz · 2018 · Frontiers in Ecology and Evolution · 441 citations

Current approaches to biodiversity conservation are largely based on geographic areas, ecosystems, ecological communities, and species, with less attention on genetic diversity and the evolutionary...

Reading Guide

Foundational Papers

Start with Grass Phylogeny Working Group II (2011) for core tree resolving C4 origins, then Vogel (2010) Brachypodium genome as Pooideae model, and Bennetzen et al. (2012) Setaria for Panicoideae reference.

Recent Advances

Study Gordon et al. (2017) on Brachypodium pan-genome variation and Coates et al. (2018) on genomic conservation units to extend phylogeny to populations.

Core Methods

Maximum likelihood trees from chloroplast (ndhF, rbcL) and nuclear genes; multispecies coalescent for polyploids; genome assemblies via NGS anchoring to maps (Bennetzen 2012).

How PapersFlow Helps You Research Molecular Phylogeny of Poaceae

Discover & Search

Research Agent uses searchPapers('molecular phylogeny Poaceae') to find Grass Phylogeny Working Group II (2011), then citationGraph reveals 520 citing papers on C4 evolution, while findSimilarPapers expands to polyploidy studies like te Beest et al. (2011). exaSearch queries 'Poaceae chloroplast phylogenomics' for unpublished preprints.

Analyze & Verify

Analysis Agent applies readPaperContent on Vogel (2010) to extract gene orthologs, verifies tree topologies with verifyResponse (CoVe) against Bennetzen et al. (2012), and runs PythonAnalysis with NumPy for bootstrap resampling on sequence alignments. GRADE grading scores evidence strength for polyploidy claims in Brochmann et al. (2004).

Synthesize & Write

Synthesis Agent detects gaps in Pooideae sampling via contradiction flagging across Peng et al. (2013) and Gordon et al. (2017), generates exportMermaid diagrams of phylogenetic networks. Writing Agent uses latexEditText for manuscript revisions, latexSyncCitations integrates 10 key papers, and latexCompile produces camera-ready figures.

Use Cases

"Analyze bootstrap support in Grass Phylogeny Working Group II (2011) tree"

Research Agent → searchPapers → Analysis Agent → readPaperContent + runPythonAnalysis (pandas bootstrap stats) → matplotlib plot of node supports.

"Draft LaTeX figure of Poaceae subfamilies from Vogel and Bennetzen genomes"

Synthesis Agent → gap detection → Writing Agent → latexGenerateFigure + latexSyncCitations (Vogel 2010, Bennetzen 2012) → latexCompile → PDF with phylogenetic tree.

"Find code for Poaceae pan-genome analysis like Brachypodium"

Research Agent → paperExtractUrls (Gordon 2017) → Code Discovery → paperFindGithubRepo → githubRepoInspect → verified pipeline for gene content variation.

Automated Workflows

Deep Research workflow conducts systematic review: searchPapers(50+ Poaceae phylogeny) → citationGraph → structured report ranking polyploidy evidence (te Beest 2011). DeepScan applies 7-step CoVe to verify reticulation in Peng et al. (2013) bamboo genome. Theorizer generates hypotheses on C4 origins from Grass Phylogeny Working Group II (2011) + recent genomes.

Try Doxa for Molecular Phylogeny of Poaceae Research

Frequently Asked Questions

What defines molecular phylogeny of Poaceae?

It reconstructs grass evolutionary relationships using DNA sequences from nuclear and chloroplast genes to resolve 12 subfamilies and 70+ tribes.

What methods are used?

Multi-locus phylogenetics, chloroplast genomes, and phylogenomics; Grass Phylogeny Working Group II (2011) used 9 genes for deep relationships, Vogel (2010) added whole-genome data.

What are key papers?

Vogel (2010, 1943 citations) on Brachypodium; Bennetzen et al. (2012, 962 citations) on Setaria; Grass Phylogeny Working Group II (2011, 520 citations) on full phylogeny.