Plastome evolution and phylogenomics of Impatiens (Balsaminaceae)

Past climate cooling and orogenesis of the Hengduan Mountains have influenced the evolution of Impatiens sect. Impatiens (Balsaminaceae) in the Northern Hemisphere

“…Scorpioidae and sect. Uniflorae , consistent with a previous phylogenomic study of Impatiens [ 53 ]. The internal phylogenetic relationships of the section were also well resolved, with strong support for seven major clades (Clades I-VII) recognized based on the plastome data (Fig.…”

“…Impatiens , particularly the role of the HDM in shaping taxon dispersal and in situ diversification, due to inadequate sampling at the sectional level (7 species, corresponding to 7.8% of the species making up the section) and the limited length of the molecular markers used for phylogenetic inference [ 49 ]. Furthermore, while previous studies have focused on resolving the phylogenetic relationships at the genus level [ 40 , 50 – 53 ], a robust, well resolved phylogenetic framework based on extensive geographic and taxonomic sampling from sect. Impatiens has been lacking.…”

The Mexican Balsam, Impatiens mexicana Rydb: A Redescription Based on Morphological and Phylogenetic Studies, with an Update of the Current Geographical Range of the Species

“…The low support values and lack of resolution of American species when atpb-rbcL and trnL-F are used separately, also suggests regions are not convenient when inferring phylogenetic positions in species with probable recent evolutionary histories. In confronting these situations, there is a need to, in future, include other types of elements, so as to gain a better overview of both types of relationships; one example is the use of complete chloroplast genomes, which several proposals in balsams have already addressed [26,[36][37][38][39]. Likewise, the species delimitation of Impatiens could be improved by using current techniques, including the multispecies coalescent method (MSC), which offers a framework for estimating evolutionary parameters, such as migration rates or intensity of introgression, and provides a useful way to apply empirical criteria to delimit species or generate hypotheses about the current state of species, and integrate the findings with evidence obtained from other fields, such as morphology and ecology.…”

“…Phylogenetic studies of Impatiens have been carried out in different world regions; for example, [15,[18][19][20] principally used the cpDNA and nrDNA regions, and others have combined DNA sequences and morphological attributes [15]. However, recent investigations have included phylogenetic proposals with complete plastomes (e.g., [26,[34][35][36][37][38][39]). Different phylogenetic studies have been conducted, including by [19], who carried out the most comprehensive phylogenetic study of American species, which encompassed six (I. aurella, I. capensis, I. ecornuta, I. noli-tangere, I. turrialbana, and I. pallida) of seven species, showing their aggregation with seven species from central China.…”