Subtopic Deep Dive

Molecular Systematics of Brassicaceae Tribes
Research Guide

What is Molecular Systematics of Brassicaceae Tribes?

Molecular systematics of Brassicaceae tribes uses multi-locus DNA sequences and phylogenomic data to resolve tribe-level relationships and paraphyletic groups like Arabideae.

This subtopic analyzes nuclear and chloroplast loci such as Chs, Adh, ndhF, and phytochrome A across 113+ species representing 17-25 tribes (Beilstein et al., 2006; 420 citations). Studies reveal chromosome triplications in Brassiceae and nested radiations via 100+ nuclear genes (Lysák et al., 2005; 667 citations; Huang et al., 2015; 324 citations). Over 10 key papers from 2000-2021 span 1055 to 213 citations.

Curated Papers

Key Challenges

Why It Matters

Accurate tribe phylogenies enable genomic resource allocation for crops like Arabidopsis thaliana and Brassica species, supporting breeding programs (Koch et al., 2000; 1055 citations). Resolving paraphyletic tribes like Arabideae clarifies hybrid speciation and chromosomal evolution, aiding conservation of 3700+ species (Bailey et al., 2006; 359 citations; Mandáková and Lysák, 2008; 233 citations). Tribe-level systematics underpins economic applications in vegetable crops and model systems (Couvreur et al., 2009; 327 citations).

Key Research Challenges

Resolving Paraphyletic Tribes

Tribes like Arabideae show paraphyly due to convergent morphological evolution, requiring multi-locus data to disentangle (Bailey et al., 2006). ndhF and phytochrome A sequences sampled 113 species but left some relationships unresolved (Beilstein et al., 2006; Beilstein et al., 2008). Nuclear genes later uncovered nested radiations (Huang et al., 2015).

Handling Hybridization Signals

Multiple hybrid formations concert ITS evolution in Arabis divaricarpa, complicating phylogenies (Koch, 2003; 241 citations). Concerted evolution masks hybrid signals in nuclear ribosomal DNA across North American populations. Multi-locus approaches mitigate this (Koch et al., 2000).

Chromosome Number Variation

Karyotype evolution in x=7 crucifers spans distinct clades, needing comparative chromosome painting (Mandáková and Lysák, 2008; 233 citations). Triplications across Brassiceae trace homeologs from Arabidopsis contigs in 21 species (Lysák et al., 2005).

Essential Papers

Comparative Evolutionary Analysis of Chalcone Synthase and Alcohol Dehydrogenase Loci in Arabidopsis, Arabis, and Related Genera (Brassicaceae)

Мarcus A. Koch, Bernhard Haubold, Thomas Mitchell‐Olds · 2000 · Molecular Biology and Evolution · 1.1K citations

We analyzed sequence variation for chalcone synthase (Chs) and alcohol dehydrogenase (Adh) loci in 28 species in the genera Arabidopsis and Arabis and related taxa from tribe Arabideae. Chs was sin...

Chromosome triplication found across the tribe <i>Brassiceae</i>

Martin A. Lysák, Мarcus A. Koch, Aleš Pečinka et al. · 2005 · Genome Research · 667 citations

We have used an ∼8.7-Mb BAC contig of Arabidopsis thaliana Chromosome 4 to trace homeologous chromosome regions in 21 species of the family Brassicaceae . Homeologs of this segment could be identif...

Brassicaceae phylogeny and trichome evolution

Mark A. Beilstein, Ihsan A. Al‐Shehbaz, Elizabeth A. Kellogg · 2006 · American Journal of Botany · 420 citations

To estimate the evolutionary history of the mustard family (Brassicaceae or Cruciferae), we sampled 113 species, representing 101 of the roughly 350 genera and 17 of the 19 tribes of the family, fo...

Toward a Global Phylogeny of the Brassicaceae

C. Donovan Bailey, Мarcus A. Koch, Michael S. Mayer et al. · 2006 · Molecular Biology and Evolution · 359 citations

The Brassicaceae is a large plant family (338 genera and 3,700 species) of major scientific and economic importance. The taxonomy of this group has been plagued by convergent evolution in nearly ev...

Molecular Phylogenetics, Temporal Diversification, and Principles of Evolution in the Mustard Family (Brassicaceae)

Thomas L. P. Couvreur, Andreas Franzke, Ihsan A. Al‐Shehbaz et al. · 2009 · Molecular Biology and Evolution · 327 citations

Brassicaceae is an important family at both the agronomic and scientific level. The family not only includes several model species, but it is also becoming an evolutionary model at the family level...

Resolution of Brassicaceae Phylogeny Using Nuclear Genes Uncovers Nested Radiations and Supports Convergent Morphological Evolution

Chien‐Hsun Huang, Renran Sun, Yi Hu et al. · 2015 · Molecular Biology and Evolution · 324 citations

Brassicaceae is one of the most diverse and economically valuable angiosperm families with widely cultivated vegetable crops and scientifically important model plants, such as Arabidopsis thaliana....

Multiple Hybrid Formation in Natural Populations: Concerted Evolution of the Internal Transcribed Spacer of Nuclear Ribosomal DNA (ITS) in North American Arabis divaricarpa (Brassicaceae)

Мarcus A. Koch · 2003 · Molecular Biology and Evolution · 241 citations

DNA sequence variation of the internal transcribed spacer (ITS) region of nuclear ribosomal DNA from Arabis holboellii, A. drummondii, and its putative hybrid A. divaricarpa was analyzed to study h...

Reading Guide

Foundational Papers

Start with Koch et al. (2000; 1055 citations) for Arabideae loci variation, Beilstein et al. (2006; 420 citations) for ndhF-based tribal framework, and Lysák et al. (2005; 667 citations) for Brassiceae cytogenetics.

Recent Advances

Study Huang et al. (2015; 324 citations) for nuclear gene radiations, Chen et al. (2021; 224 citations) for BRAD V3.0 database, building on Couvreur et al. (2009).

Core Methods

Multi-locus sequencing (Chs, Adh, ndhF, ITS), comparative chromosome painting, nuclear phylogenomics with 100+ genes, karyotype evolution tracing.

How PapersFlow Helps You Research Molecular Systematics of Brassicaceae Tribes

Discover & Search

Research Agent uses searchPapers with 'Brassicaceae tribe phylogeny ndhF' to find Beilstein et al. (2006; 420 citations), then citationGraph reveals Koch et al. (2000; 1055 citations) as highly cited predecessor, and findSimilarPapers uncovers Huang et al. (2015) for nuclear gene advances.

Analyze & Verify

Analysis Agent applies readPaperContent to extract ndhF phylogenies from Beilstein et al. (2006), verifies tribe paraphyly claims via verifyResponse (CoVe) against Lysák et al. (2005), and runs PythonAnalysis with pandas to compare citation-normalized sequence divergence from Koch et al. (2000) Chs/Adh data, graded by GRADE for evidence strength.

Synthesize & Write

Synthesis Agent detects gaps in Arabideae resolution between Bailey et al. (2006) and Huang et al. (2015), flags ITS hybridization contradictions from Koch (2003); Writing Agent uses latexEditText for phylogeny revisions, latexSyncCitations to integrate 10 papers, latexCompile for tribe diagram PDFs, and exportMermaid for radiation flowcharts.

Use Cases

"Analyze Chs and Adh divergence rates across Arabideae species from Koch 2000."

Research Agent → searchPapers('Koch 2000 Brassicaceae') → Analysis Agent → readPaperContent + runPythonAnalysis(pandas plot sequence variation) → matplotlib divergence graph with statistical tests.

"Generate LaTeX figure of Brassicaceae tribe phylogeny from ndhF data."

Research Agent → citationGraph('Beilstein 2006') → Synthesis Agent → gap detection → Writing Agent → latexGenerateFigure + latexSyncCitations(10 papers) + latexCompile → compiled PDF with ndhF tree.

"Find code for Brassicaceae karyotype analysis similar to Lysák 2005."

Research Agent → paperExtractUrls('Lysák 2005') → Code Discovery → paperFindGithubRepo → githubRepoInspect → exportCsv(chromosomal homeolog data) for comparative analysis.

Automated Workflows

Deep Research workflow scans 50+ Brassicaceae papers via searchPapers, structures tribe phylogeny report with citationGraph from Koch et al. (2000), and applies CoVe checkpoints. DeepScan performs 7-step analysis on Huang et al. (2015) nuclear genes: readPaperContent → runPythonAnalysis(alignment stats) → GRADE verification. Theorizer generates hypotheses on Brassiceae triplication evolution from Lysák et al. (2005) and Mandáková papers.

Try Doxa for Molecular Systematics of Brassicaceae Tribes Research

Frequently Asked Questions

What defines molecular systematics of Brassicaceae tribes?

It uses multi-locus data like ndhF, Chs, Adh to resolve tribe phylogenies and paraphyletic groups (Beilstein et al., 2006; Bailey et al., 2006). Focuses on 17-25 tribes across 338 genera.

What methods are central?

Chloroplast ndhF/phytochrome A sequencing (Beilstein et al., 2008), nuclear multi-gene phylogenomics (Huang et al., 2015), chromosome painting for karyotypes (Lysák et al., 2005; Mandáková and Lysák, 2008).

What are key papers?

Koch et al. (2000; 1055 citations) on Chs/Adh in Arabideae; Beilstein et al. (2006; 420 citations) ndhF phylogeny; Huang et al. (2015; 324 citations) nuclear resolution.

What open problems remain?

Full resolution of hybridization impacts on tribe boundaries (Koch, 2003) and integrating phylogenomics with morphology for remaining paraphyletic tribes (Couvreur et al., 2009).