Meso-Papilionoideae

Meso-Papilionoideae or 50-kb Inversion clade^[4] is a monophyletic clade of the flowering plant subfamily Faboideae (or Papilionoideae) that includes the majority of papilionoid legumes. It contains many agronomically important genera, including Arachis (peanut), Cicer (chickpea), Glycine (soybean), Medicago (alfalfa), Phaseolus (common bean), Trifolium (clover), Vicia (vetch), and Vigna (mung bean).

Meso-Papilionoideae Temporal range: Late Paleocene - recent[1] PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Fabales
Family:	Fabaceae
Subfamily:	Faboideae
Clade:	Meso-Papilionoideae L. P. de Queiroz and M. F. Wojciechowski 2013[2]
Clades[3]
Exostyleae Genistoids Vataireoids Andira clade Dalbergioids Old World clade Baphieae NPAAA clade incertae sedis Amphimas Pierre ex Harms Dermatophyllum Scheele
Synonyms
50-kb Inversion clade Doyle et al. 1997[4]

This clade is circumscribed by the presence of a 50 kb inverted DNA sequence in the plastome of member species and is consistently resolved in molecular phylogenies.^{[4][5][6][7][3][8]}

The name Meso-Papilionoideae was proposed for this clade by Wojciechowski (2013)^[2]. Its original name, 50-kb Inversion clade^[4] is still in use and the clade is still frequently referred to by this name in publications, as well as the Angiosperm Phylogeny Website and NCBI taxonomy browser^[9].

Description

This clade circumscribes six subordinate clades: one traditional tribe (Exostyleae) and five informal clades (the genistoids, the vataireoids, the dalbergioids, the Andira clade, and the Old World Clade), as well as the genus Amphimas.^[3] The clade has the following ICPN-compliant, node-based definition:

The most inclusive crown clade exhibiting the structural rearrangement in the plastid genome (inversion of a ~50 Kb segment in the large-single copy region with endpoints between the accD and trnK regions^[10]) homologous with that found in Aldina latifolia Spruce ex Benth. 1870, Holocalyx balansae Micheli 1883, Maackia amurensis Rupr. 1856, Wisteria floribunda (Willd.) DC. 1825, and Glycine max (L.) Merr. 1917, where these taxa are extant species included in the crown clade defined by this name.^[2]

References

1. "Fabales". www.mobot.org. Retrieved 2023-06-16.
2. Wojciechowski MF. (2013). "Towards a new classification of Leguminosae: Naming clades using non-Linnaean phylogenetic nomenclature". S Afr J Bot. 89: 85–93. doi:10.1016/j.sajb.2013.06.017.
3. Cardoso D, Pennington RT, de Queiroz LP, Boatwright JS, Van Wyk BE, Wojciechowski MF, Lavin M (2013). "Reconstructing the deep-branching relationships of the papilionoid legumes". S Afr J Bot. 89: 58–75. doi:10.1016/j.sajb.2013.05.001. hdl:10566/3193.
4. Doyle JJ, Doyle JL, Ballenger JA, Dickson EE, Kajita T, Ohashi H (1997). "A phylogeny of the chloroplast gene rbcL in the Leguminosae: taxonomic correlations and insights into the evolution of nodulation". Am J Bot. 84 (4): 541–554. doi:10.2307/2446030. JSTOR 2446030. PMID 21708606.
5. Pennington RT, Lavin M, Ireland H, Klitgaard B, Preston J, Hu JM (2001). "Phylogenetic relationships of basal papilionoid legumes based upon sequences of the chloroplast trnL intron". Syst Bot. 55 (5): 818–836. doi:10.1043/0363-6445-26.3.537 (inactive 1 November 2024).{{cite journal}}: CS1 maint: DOI inactive as of November 2024 (link)
6. Wojciechowski MF, Lavin M, Sanderson MJ (2004). "A phylogeny of legumes (Leguminosae) based on analysis of the plastid matK gene resolves many well-supported subclades within the family". Am J Bot. 91 (11): 1846–862. doi:10.3732/ajb.91.11.1846. PMID 21652332.
7. Cardoso D, de Queiroz LP, Pennington RT, de Lima HC, Fonty É, Wojciechowski MF, Lavin M (2012). "Revisiting the phylogeny of papilionoid legumes: new insights from comprehensively sampled early-branching lineages". Am J Bot. 99 (12): 1991–2013. doi:10.3732/ajb.1200380. PMID 23221500.
8. Choi IS, Cardoso D, de Queiroz LP, de Lima HC, Lee C, Ruhlman TA, Jansen RK, Wojciechowski MF (2022). "Highly Resolved Papilionoid Legume Phylogeny Based on Plastid Phylogenomics". Front Plant Sci. 13: 823190. doi:10.3389/fpls.2022.823190. PMC 8905342. PMID 35283880.
9. "Home - Taxonomy - NCBI".
10. Doyle JJ, Doyle JL, Ballenger JA, Palmer JD (1996). "The distribution and phylogenetic significance of a 50-Kb chloroplast DNA inversion in the flowering plant family Leguminosae". Mol Phylogenet Evol. 5 (2): 429–438. Bibcode:1996MolPE...5..429D. doi:10.1006/mpev.1996.0038. PMID 8728401.