A molecular phylogeny of Caraganeae (Leguminosae, Papilionoideae) reveals insights into new generic and infrageneric delimitations

Abstract

Based on sequence data of nuclear ITS and plastid matK, trnL-F and psbA-trnH markers, the phylogeny of the subtribes Caraganinae and Chesneyinae in tribe Caraganeae was inferred. The results support the monophyly of each of the subtribes. Within subtribes Caraganinae, Calophaca and Halimodendron are herein transferred into Caragana to ensure its generic monophyly. The subtribe Chesneyinae is composed of four well-supported genera: Chesneya, Chesniella, Gueldenstaedtia and Tibetia. Based on phylogenetic, morphological, distributional and habitat type evidence, the genus Chesneya was divided into three monophyletic sections: Chesneya sect. Chesneya, Chesneya sect. Pulvinatae and Chesneya sect. Spinosae. Chesneya macrantha is herein transferred into Chesniella. Spongiocarpella is polyphyletic and its generic rank is not maintained. The position of Chesneya was incongruent in the nuclear ITS and the plastid trees. A paternal chloroplast capture event via introgression is hypothesized for the origin of Chesneya, which is postulated to have involved the common ancestor of Chesniella (♂) and that of the Gueldenstaedtia – Tibetia (GUT) clade (♀) as the parents.

Chloroplast Phylogenomics Reveals the Intercontinental Biogeographic History of the Liquorice Genus (Leguminosae: Glycyrrhiza)

“…In previous taxonomic studies, Glycyrrhiza was treated within tribe Galegeae (Grigorev and Vasilchenko, 1948;Chamberlain, 1970;Bao and Larsen, 2010), however, our results show that Galegeae is nonmonophyletic, with Glycyrrhiza and Astragalus strictus R.Grah. ex Benth distantly related, consistent with recent molecular phylogenetic studies (Wojciechowski et al, 2004;LPWG, 2013;Duan et al, 2015Duan et al, , 2016.…”

Evolutionary response to the Qinghai-Tibetan Plateau uplift: phylogeny and biogeography ofAmmopiptanthusand tribe Thermopsideae (Fabaceae)

“…3 ). Although not all of the support values are significant (BI posterior probability > 0.95, ML bootstrap value > 70%), the current case of topological discordance is similar to Xu et al (2012) , García et al (2014) and Duan et al (2016) , which likely implied a chloroplast capture event in the origin of Sophoreae. Nevertheless, highly supported phylogenetic trees based on multi-locus nuclear and plastid genes are required to further verify this hypothesis.…”

Hedysarum L. (Fabaceae: Hedysareae) Is Not Monophyletic – Evidence from Phylogenetic Analyses Based on Five Nuclear and Five Plastid Sequences

“…Our results are consistent with this scenario, i.e., multiple nuclear datasets are not supporting the monophyletic Hedysarum as suggested by the plastid tree. Chloroplast capture is probably one of the most common causes of phylogenetic incongruence [ 58 ], and has been reported in a wide range of taxa at various taxonomic levels [ 14 , 15 , 68 – 75 ].…”