Astragalus (Fabaceae): A molecular phylogenetic perspective

  title={Astragalus (Fabaceae): A molecular phylogenetic perspective},
  author={Martin F. Wojciechowski},
Nucleotide sequences of the plastidmatK gene and nuclear rDNA internal transcribed spacer region were sampled fromAstragalus L. (Fabaceae), and its closest relatives within tribe Galegeae, to infer phylogenetic relationships and estimate ages of diversification. Consistent with previous studies that emphasized sampling for nrDNA ITS primarily within either New World or Old World species groups,Astragalus, with the exception of a few morphologically distinct species, is strongly supported as… 

Phylogenetic relationships and infrageneric classification of Astragalus tragacantha L. (Fabaceae), inferred from nuclear ribosomal DNA Internal transcribed spacers data (nrDNA ITS)

This study produces original molecular data (nrDNA ITS) for Astragalus tragacantha L. (subgenus Cercidothrix Bunge), a rare thorny cushion-forming shrub occurring in the West Mediterranean basin, and shows that its relatives do not possess similar morphology.

Phylogenetic origin of Phyllolobium with a further implication for diversification of Astragalus in China.

Molecular dating suggested that Phyllolobium and Astragalus s.s. originated around 8 and 10 million years ago, which are highly consistent with the intense uplifts of the Qinghai-Tibetan Plateau inferred from geological evidence.

Molecular phylogeny and divergence times of Astragalus section Hymenostegis: An analysis of a rapidly diversifying species group in Fabaceae

DNA sequence diversity is generally very low among Hymenostegis taxa, which is consistent with recent diversification of the section, and it is estimated that diversification in sect.

Towards a phylogeny for Astragalus section Caprini (Fabaceae) and its allies based on nuclear and plastid DNA sequences

We conducted phylogenetic analyses of the sect. Caprini and its closely related sections within Astragalus. Analyses of a combined dataset including nrDNA ETS and three cpDNA markers using maximum

Phylogeny, biogeography, and rates of diversification of New World Astragalus (Leguminosae) with an emphasis on South American radiations.

Two clades of South American species nested within the North American species, implying two separate invasions from North to South America, are supported, reasserting Neo-Astragalus in the growing list of recent rapid radiations of plants, especially in areas with a high physiographic diversity, such as the Andes.

A molecular phylogeny of the pantropical papilionoid legume Aeschynomene supports reinstating the ecologically and morphologically coherent genus Ctenodon

The most complete DNA sequence data is assembled and Bayesian and maximum likelihood phylogenetic analyses unequivocally confirm the non-monophyly of Aeschynomene.

Molecular phylogeny of Astragalus section Anthylloidei (Fabaceae) inferred from nrDNA ITS and plastid rpl32-trnL (UAG) sequence data

The results suggest that morphology cannot elucidate infrageneric relationships in spiny Astragalus accurately; analyzed characters have evolved several times in sect.

Molecular phylogeny of selected Old World Astragalus (Fabaceae): incongruence among chloroplast trnL‐F, ndhF and nuclear ribosomal DNA ITS sequences

This study reports maximum parsimony and Bayesian phylogenetic analyses of selected Old World Astragalus using two chloroplast fragments including trnL-F and ndhF and the nuclear ribosomal internal

Molecular phylogeny and divergence times of the genus Hedysarum (Fabaceae) with special reference to section Multicaulia in Southwest Asia

The results did not support the monophyly of the three traditionally recognized subsections of Multicaulia, and Bayesian divergence time estimation suggested that the initial radiation of Hedysarum and the subsequent divergence of its major clades started in the middle Miocene and extended into the Pliocene and Pleistocene.



Molecular systematics of the genus Astragalus L. (Fabaceae): Phylogenetic analyses of nuclear ribosomal DNA internal transcribed spacers and chloroplast gene ndhF sequences

Comparative sequencing of internal transcribed spacers and 5.8S gene of nuclear ribosomal DNA was carried out to examine phylogenetic relationships among subgenera and sections of Old World Astragalus as well as the recent segregate genera Barnebyella and Ophiocarpus to confirm earlier studies that shows A. vogelii is allied with the genera Colutea and Oxytropis rather than with any AStragalus species.

Evidence on the monophyly of Astragalus (Fabaceae) and its major subgroups based on nuclear ribosomal DNA ITS and chloroplast DNA trnL intron data

Preliminary estimates of the absolute rate of species diversification in Astragalus suggest it may be higher than in some other, often cited, continental or insular adaptive radiations in angiosperms.

Phylogenetic Relationships within North American Astragalus L. (Fabaceae)

A cladistic analysis of 113 species and varieties of North American Astragalus is presented to develop hypotheses of phylogenetic relationship among sections and major clades and the monophyly of sections and higher level relationships proposed by Rydberg, Jones, and Barneby are briefly evaluated.


The data suggest that the New World aneuploidspecies of Astragalus form a monophyletic but morphologically cryptic group derived from euploid species of Old World (Eurasian) origin, which are consequently paraphyletic.

Phylogeny of Robinioid Legumes (Fabaceae) Revisited: Coursetia and Gliricidia Recircumscribed, and a Biogeographical Appraisal of the Caribbean Endemics

This study reveals that sequences from the nuclear ribosomal ITS region are amenable to exhaustive taxon sampling because of the high levels of variation at and below the species level.

A phylogeny of legumes (Leguminosae) based on analysis of the plastid matK gene resolves many well-supported subclades within the family.

Analysis of the matK data consistently resolves but modestly supports a clade comprising papilionoid taxa that accumulate canavanine in the seeds, which suggests a single origin for the biosynthesis of this most commonly produced of the nonprotein amino acids in legumes.

A phylogeny of the chloroplast gene rbcL in the Leguminosae: taxonomic correlations and insights into the evolution of nodulation.

Phylogenetic analysis of the chloroplast-encoded rbcL gene in Leguminosae are consistent with previous hypotheses in suggesting that the family as a whole is monophyletic, but that only two of its

Phylogenetic relationships in North American Astragalus (Fabaceae) based on chloroplast DNA restriction site variation

The survey of chloroplast DNA restriction site variation revealed that the North American aneuploid series forms a monophyletic ingroup relative to the Old World euploid outgroups and a diverse assemblage of taxa comprising some 20% of the North America species is monophylete.

Phylogenetic Analysis of Nuclear Ribosomal ITS/5.8S Sequences in the Tribe Millettieae (Fabaceae): Poecilanthe-Cyclolobium, the core Millettieae, and the Callerya Group

Phylogenetic analysis of nuclear ribosomal DNA ITS/5.8S sequences reveals that Millettia is polyphyletic, and that subclades of the core Millettieae group, such as the New World Lonchocarpus or the pantropical Tephrosia and segregate genera, each form well supported monophyletic subgroups.