Abstract
ABSTRACT Southwestern China harbors high Impatiens diversity and numerous endemics, but its diversity and insufficient research have hindered clarification of their taxonomic and phylogenetic relationships. In this study, two distinct populations characterized by broadly funnelform lateral sepals were discovered in Guizhou. Given the complicated taxonomic relationships among their closely related species, further research is necessary to determine their exact taxonomic status. Investigations based on geographic proximity and morphological affinities tentatively linked the new populations to Impatiens oxyanthera , I. piufanensis , and its variety I. forrestii , as well as five other species. A taxonomic study of the aforementioned species was conducted using morphological comparison and genome sequencing (total of 10 chloroplast genomes). Phylogenetic analyses were performed based on the complete chloroplast genome sequences of 32 species across the Balsaminaceae, aiming to provide a basis for taxonomic decisions. The two new populations had 151,939 and 151,789 bp chloroplast genomes with a typical quadripartite structure, containing 113 genes. The ycf1 was identified as a potential molecular marker. Phylogenetic analysis resolved three strongly supported clades (BS = 100). These 10 chloroplast genomes exhibit high pairwise homology. The two newly discovered populations with different flower color showed 99.7% identity. Combined with morphological verification, these two populations were confirmed as conspecific, and this taxon was formally named Impatiens xishuiensis . Taxonomic revisions include recognizing I. piufanensis and I. forrestii as synonyms of I. oxyanthera , I. tienchuanensis and I. fanjingshanica as synonyms of I. commelinoides . I. sunii is probably an infraspecific entity. Although morphologically similar to I. oxyanthera , I. xishuiensis is molecularly closer to I. commelinoides . Taxonomic revisions are corroborated by both genomic and morphological data. In Impatiens , floral color is likely of relatively limited value for inferring interspecific phylogenetic affinities. This study highlights the value of chloroplast genomes in resolving phylogenetic and taxonomic complexities in Impatiens .
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Claims 11
Claim · model-written summary
Two distinct Impatiens populations with broadly funnelform lateral sepals were discovered in Guizhou.
ImpatiensOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Within the Genus Impatiens”
e1“two distinct populations characterized by broadly funnelform lateral sepals were discovered in Guizhou”
Claim · model-written summary
The new populations are named Impatiens xishuiensis as a new species.
- Outcome
- Impatiens xishuiensise2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Within the Genus Impatiens”
e2“this taxon was formally named Impatiens xishuiensis”
Claim · model-written summary
Impatiens piufanensis and I. forrestii are synonyms of I. oxyanthera.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Within the Genus Impatiens”
e3“recognizing I. piufanensis and I. forrestii as synonyms of I. oxyanthera”
Claim · model-written summary
Impatiens tienchuanensis and I. fanjingshanica are synonyms of I. commelinoides.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Within the Genus Impatiens”
e4“I. tienchuanensis and I. fanjingshanica as synonyms of I. commelinoides”
Claim · model-written summary
Impatiens sunii is probably an infraspecific entity.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Within the Genus Impatiens”
e5“I. sunii is probably an infraspecific entity”
Claim · model-written summary
The two new populations have chloroplast genomes of 151,939 and 151,789 bp.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Within the Genus Impatiens”
e6“The two new populations had 151,939 and 151,789 bp chloroplast genomes”
Claim · model-written summary
The ycf1 gene is a potential molecular marker in Impatiens.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Within the Genus Impatiens”
e7“The ycf1 was identified as a potential molecular marker”
Claim · model-written summary
Phylogenetic analysis resolved three strongly supported clades in Balsaminaceae.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Within the Genus Impatiens”
e1“Phylogenetic analysis resolved three strongly supported clades (BS = 100)”
Claim · model-written summary
The two newly discovered populations showed 99.7% chloroplast genome identity.
- Material
- two newly discovered populationse1
- Outcome
- identitye1
- Value
- 99.7%e1
- Qualifier
- with different flower colore1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Within the Genus Impatiens”
e1“The two newly discovered populations with different flower color showed 99.7% identity”
Claim · model-written summary
Impatiens xishuiensis is molecularly closer to I. commelinoides than morphologically similar to I. oxyanthera.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Within the Genus Impatiens”
e1“Although morphologically similar to I. oxyanthera , I. xishuiensis is molecularly closer to I. commelinoides”
Claim · model-written summary
Floral color is likely of relatively limited value for inferring interspecific phylogenetic affinities in Impatiens.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Within the Genus Impatiens”
e1“floral color is likely of relatively limited value for inferring interspecific phylogenetic affinities”