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17 results for “Oxytropis”
FIG. 6. — Oxytropis tatarica Hook.f in Contribution of French explorers to the study of Middle Asian flora: the herbarium collections by Guillaume Capus (1857-1931)
FIG. 6. — Oxytropis tatarica Hook.f. & Thomson ex Bunge; collection by Guillaume Capus housed at the P Herbarium, G. Capus 365 (P[P02914846]).
Fig. 6 - Oxytropis ocrensis F in New floristic data of vascular plants from central Italy
Fig. 6 - Oxytropis ocrensis F.Conti & Bartolucci. (Photo / Foto F. Conti).
Tension zone trapped by exogenous cline: analysis of a narrow hybrid zone between two parapatric Oxytropis species (Fabaceae)
<p>Hybrid zones have been widely highlighted for their interest in understanding evolutionary processes. It is generally accepted that hybrid zones can be maintained in a balance between dispersal and selection. However, the selective forces can either be endogenous (i.e., genetic incompatibilities between parental taxa) or exogenous (i.e., parental taxa are adapted to different environments).</p> <p>In this study, we evaluated these alternatives and determined the maintenance of a narrow hybrid zone between parapatric distributed <em>Oxytropis diversifolia</em> and <em>O. leptophylla</em> in Nei Mongol, China. For 507 individuals sampled from two populations in the hybrid zone, 12 <em>O. diversifolia</em> populations and five <em>O. leptophylla</em> populations, we measured leaf-morphological characteristics, quantified genetic structure using 11 nuclear microsatellite loci and five chloroplast DNA intergenic regions, collected micro- and macrohabitat data, and conducted geographical cline analysis.</p> <p>We found that the two species differed in leaf morphology, and putative hybrids showed either intermediacy or a bias to <em>O. diversifolia</em>. Parental taxa formed two genetically distinct clusters, while populations in the hybrid zone consisted of both parental forms and various admixed individuals, exhibiting a bimodal pattern. The hybrid zone was coupled to ecological transitions of both microhabitat (i.e., the slope) and macroclimatic conditions. However, the genetic clines were significantly narrower than the environmental cline.</p> <p>Our results indicate that endogenous selection can be primarily responsible for maintaining the hybrid zone, while local adaptation accounts for the position of the zone. We further suggest the probable outcome of hybridization could be introgression.</p>
Tension zone trapped by exogenous cline: analysis of a narrow hybrid zone between two parapatric Oxytropis species (Fabaceae)
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FIGURE 6. A. Oxytropis ocrensis. B in A new species of Oxytropis (Fabaceae) from Central Apennines (Italy)
FIGURE 6. A. Oxytropis ocrensis. B. Inflorescence and leaf of O. ocrensis. C. O. ocrensis in the locus classicus.
FIGURE 3 in A new species of Oxytropis (Fabaceae) from Central Apennines (Italy)
FIGURE 3. Principal Component Analysis of flower features. O. ocrensis green and rhombus symbol; O. xerophila red and round symbol; O. halleri blue and square symbol; O. korabensis purple and triangle symbol.
FIGURE 1. Box plot for leaf and stem variables with p-value less than 0.0001 in A new species of Oxytropis (Fabaceae) from Central Apennines (Italy)
FIGURE 1. Box plot for leaf and stem variables with p-value less than 0.0001 in Kruskal-Wallis test. O.o.: Oxytropis ocrensis, O.h.: O. halleri, O.k.: O. korabensis; O.x.: O. xerophila.
FIGURE 4 in A new species of Oxytropis (Fabaceae) from Central Apennines (Italy)
FIGURE 4. Graph of Discriminant Analysis with representation of the first two factors. O. ocrensis green and rhombus symbol; O. xerophila red and round symbol; O. halleri blue and square symbol; O. korabensis purple and triangle symbol.
FIGURE 2. Box plot for leaf and stem variables with p-value less than 0.0001 in A new species of Oxytropis (Fabaceae) from Central Apennines (Italy)
FIGURE 2. Box plot for leaf and stem variables with p-value less than 0.0001 in Kruskal-Wallis test. O.o.: Oxytropis ocrensis, O.h.: O. halleri, O.k.: O. korabensis; O.x.: O. xerophila.
FIGURE 3 in A new species of Oxytropis (Fabaceae: Papilionoideae) from India
FIGURE 3. Oxytropis cachemiriana: A, Habit; B, Close-up of inflorescence. O. tatarica: C, Habit; D, Close-up of inflorescence. O. sanjappae sp. nov.: E, Habit; F, Close-up of inflorescence & infruitescence. A–F photos by L. B. Chaudhary.
FIGURE 1 in A new species of Oxytropis (Fabaceae: Papilionoideae) from India
FIGURE 1. Oxytropis sanjappae sp. nov.: A, Habit; B, A portion of stem with stipules; C–F, Leaflets; G, Bract; H, Calyx (splitted); I, Standard; J, Wing petals; K, Keel petal; L, Stamens; M, Carpel; N, Pod; O, Seed. From Chaudhary & Bajpai 259339 (LWG). B–O illustrated by O. Bajpai.
Figure 2 from: Chen J-T, Zhang D-G, Lv Z-Y, Huang X-H, Liu P-J, Yang J-N, Yang J-Y, Tojibaev K, Deng T, Sun H (2020) Oxytropis shennongjiaensis (Fabaceae), a new species from Hubei, Central China. PhytoKeys 149: 117-128. https://doi.org/10.3897/phytokeys.149.49533
Figure 2 Oxytropis shennongjiaensis D.G. Zhang, J.T. Chen, T. Deng & H. Sun A, B plant showing flowering branch and leaves C bract D calyx E–F wing G–H standard (view from inside) I keel J ovary K legume L stipules. (Drawn based on the holotype of D.G. Zhang & Q. Liu 19060901 by J. N. Yang).
Figure 3 from: Chen J-T, Zhang D-G, Lv Z-Y, Huang X-H, Liu P-J, Yang J-N, Yang J-Y, Tojibaev K, Deng T, Sun H (2020) Oxytropis shennongjiaensis (Fabaceae), a new species from Hubei, Central China. PhytoKeys 149: 117-128. https://doi.org/10.3897/phytokeys.149.49533
Figure 3 Oxytropis shennongjiaensis D.G. Zhang, J.T. Chen, T. Deng & H. Sun A, B habitat C root D, E flowering branch and leaves F raceme (close-up) G, H floral parts (showing calyx, standard, wings, keel and stamens) I legume.
Figure 1 from: Chen J-T, Zhang D-G, Lv Z-Y, Huang X-H, Liu P-J, Yang J-N, Yang J-Y, Tojibaev K, Deng T, Sun H (2020) Oxytropis shennongjiaensis (Fabaceae), a new species from Hubei, Central China. PhytoKeys 149: 117-128. https://doi.org/10.3897/phytokeys.149.49533
Figure 1 Photograph of the holotype of Oxytropis shennongjiaensis D.G. Zhang, J.T. Chen, T. Deng & H. Sun (KUN barcode 1347953).
Figure 5 from: Chen J-T, Zhang D-G, Lv Z-Y, Huang X-H, Liu P-J, Yang J-N, Yang J-Y, Tojibaev K, Deng T, Sun H (2020) Oxytropis shennongjiaensis (Fabaceae), a new species from Hubei, Central China. PhytoKeys 149: 117-128. https://doi.org/10.3897/phytokeys.149.49533
Figure 5 Maximum likelihood consensus tree of Oxytropis shennongjiaensis and related taxa. Numbers above branches indicate Bayesian posterior probability [PP], numbers below branches represent maximum likelihood bootstrap support [ML/BS] and maximum parsimony bootstrap support [MP/BS] values. Only bootstrap values > 50% are shown. The new species is shown in bold.
Figure 4 from: Chen J-T, Zhang D-G, Lv Z-Y, Huang X-H, Liu P-J, Yang J-N, Yang J-Y, Tojibaev K, Deng T, Sun H (2020) Oxytropis shennongjiaensis (Fabaceae), a new species from Hubei, Central China. PhytoKeys 149: 117-128. https://doi.org/10.3897/phytokeys.149.49533
Figure 4 Known distribution of Oxytropis shennongjiaensis D.G. Zhang, J.T. Chen, T. Deng & H. Sun (The red dot represents the distribution site).
FIGURE 2 in A new species of Oxytropis (Fabaceae: Papilionoideae) from India
FIGURE 2. Distribution of Oxytropis sanjappae sp. nov. in India.
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