Inverted repeat-lacking clade explained

The inverted repeat-lacking clade (IRLC) is a monophyletic clade of the flowering plant subfamily Faboideae (or Papilionaceae). Faboideae includes the majority of agriculturally-cultivated legumes. The name of this clade is informal and is not assumed to have any particular taxonomic rank like the names authorized by the ICBN or the ICPN. The clade is characterized by the loss of one of the two 25-kb inverted repeats in the plastid genome that are found in most land plants.[1] It is consistently resolved in molecular phylogenies.[2] [3] [4] [5] [6] [7] [8] The clade is predicted to have diverged from the other legume lineages 39.0±2.4 million years ago (in the Eocene).[9] It includes several large, temperate genera such as Astragalus, Hedysarum, Medicago, Oxytropis, Swainsona, and Trifolium.

Description

This clade is composed of five traditional tribes (Cicereae, Fabeae, Galegeae, Hedysareae, and Trifolieae) and several genera that were traditionally placed in the tribe Millettieae: Afgekia, Callerya, Endosamara, Sarcodum, Wisteria, and possibly Antheroporum. The first five of these genera have been transferred to the tribe Wisterieae, so that as revised, the tribe Millettieae falls outside the IRLC clade.[10] The clade is defined as:

"The most inclusive crown clade exhibiting the structural mutation in the plastid genome (loss of one copy of the ~25-kb inverted repeat region) homologous with that found in Galega officinalis, Glycyrrhiza lepidota, and Vicia faba, where these taxa are extant species included in the crown clade defined by this name."

Uses

This clade includes edible plants such as garden peas, lentils, chickpeas, licorice, alfafa, among others.

External links

Notes and References

  1. Lavin M, Doyle JJ, Palmer JD . 1990 . Evolutionary significance of the loss of the chloroplast-DNA inverted repeat in the Leguminosae subfamily Papilionoideae . Evolution . 44 . 2 . 390–402 . 2409416 . 10.2307/2409416. 28564377 . 2027.42/137404 .
  2. Book: Liston A. . 1995 . Use of the polymerase chain reaction to survey for the loss of the inverted repeat in the legume chloroplast genome . Crisp MD, Doyle JJ . Advances in Legume Systematics, Part 7: Phylogeny . http://www.kewbooks.com/asps/ShowDetails.asp?id=81 . Kew, UK . Royal Botanic Gardens . 31–40 . 0947643796 .
  3. Käss E, Wink M . 1996 . Molecular evolution of the Leguminosae: Phylogeny of the three subfamilies based on rbcL-sequences . . 24 . 5 . 365–378 . 10.1016/0305-1978(96)00032-4 . 1996BioSE..24..365K .
  4. Sanderson MJ, Wojciechowski MF . 1996 . Diversification rates in a temperate legume clade: Are there "so many species" of Astragalus (Fabaceae)? . . 83 . 11 . 1488–1502 . 10.2307/2446103 . 2446103 .
  5. 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 . . 84 . 4 . 541–554 . 21708606 . 10.2307/2446030. 2446030 . free .
  6. 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 . . 26 . 3 . 537–556 . 10.1043/0363-6445-26.3.537 . 31 January 2024 .
  7. McMahon MM, Sanderson MJ . 2006 . Phylogenetic supermatrix analysis of GenBank sequences from 2228 papilionoid legumes . . 55 . 5 . 818–836 . 10.1080/10635150600999150 . 17060202 . free .
  8. 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 . . 99 . 12 . 1991–2013 . 10.3732/ajb.1200380 . 23221500 .
  9. Lavin M, Herendeen PS, Wojciechowski MF . 2005 . Evolutionary rates analysis of Leguminosae implicates a rapid diversification of lineages during the tertiary . . 54 . 4 . 575–94 . 10.1080/10635150590947131 . 16085576 . free .
  10. Compton . James A. . Schrire . Brian D. . Könyves3 . Kálmán . Forest . Félix . Malakasi . Panagiota . Sawai Mattapha . Sirichamorn . Yotsawate . 2019 . The Callerya Group redefined and Tribe Wisterieae (Fabaceae) emended based on morphology and data from nuclear and chloroplast DNA sequences . PhytoKeys . 125 . 1–112 . 10.3897/phytokeys.125.34877 . 31303810 . 6610001 . amp . free .

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