Disentangling relationships among the diploid members of the intricate genus Knautia (Caprifoliaceae, Dipsacoideae)

Rešetnik, Ivana; Frajman, Božo; Bogdanović, Sandro; Ehrendorfer, Friedrich

doi:10.1016/j.ympev.2014.01.028

Cited by 31 publications

(74 citation statements)

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“…This was confirmed by molecular data suggesting that K. carinthiaca has an isolated position among the diploid taxa of the genus (Rešetnik et al. ). It inhabits mosaic habitats comprising calcareous cliffs and screes as well as adjacent dry grasslands and open thermophilous forests.…”

Section: Introductionmentioning

confidence: 56%

“…() and Rešetnik et al. (). We employed the same three primer combinations for the selective PCR as in the previous study (Rešetnik et al.…”

Section: Methodsmentioning

confidence: 99%

“…; Rešetnik et al. ), which includes a few widespread species, but most of the taxa are confined to small areas (Ehrendorfer , ; Rešetnik et al. ).…”

Section: Introductionmentioning

confidence: 99%

“…), which includes a few widespread species, but most of the taxa are confined to small areas (Ehrendorfer , ; Rešetnik et al. ). The species with the widest distribution, ranging almost throughout the entire range of the genus, is K. arvensis (L.) Coult.…”

Section: Introductionmentioning

confidence: 99%

“…; authors' personal observations) and most likely expanded its range dramatically during the last few thousand years in the course of the expansion of secondary grasslands following anthropogenic deforestation (Rešetnik et al. ). On the other hand, one of the geographically most restricted Knautia species is K. carinthiaca Ehrend., which is endemic to the valleys of the streams Görtschitz and Gurk in the Austrian federal state of Carinthia (Kärnten; Fischer et al.…”

Section: Introductionmentioning

confidence: 99%

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Does hybridization with a widespread congener threaten the long‐term persistence of the Eastern Alpine rare local endemic Knautia carinthiaca?

Čertner

Kolář

Schönswetter

2015

Ecology and Evolution

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Interspecific hybridization, especially when regularly followed by backcrossing (i.e., introgressive hybridization), conveys a substantial risk for many endangered organisms. This is particularly true for narrow endemics occurring within distributional ranges of widespread congeners. An excellent example is provided by the plant genus Knautia (Caprifoliaceae): Locally endemic K. carinthiaca is reported from two isolated populations in southern Austria situated within an area predominantly occupied by widespread K. arvensis. While K. carinthiaca usually inhabits low‐competition communities on rocky outcrops, K. arvensis occurs mainly in dry to mesic managed grasslands, yet both species can coexist in marginal environments and were suspected to hybridize. Flow cytometry revealed that diploid K. carinthiaca only occurs at its locus classicus, whereas the second locality is inhabited by the morphologically similar but tetraploid K. norica. In the, therefore, single population of K. carinthiaca, flow cytometry and AFLP fingerprinting showed signs of introgressive hybridization with diploid K. arvensis. Hybridization patterns were also reflected in intermediate habitat preferences and morphology of the hybrids. Environmental barriers to gene flow seem to prevent genetic erosion of K. carinthiaca individuals from the core ecological niches, restricting most introgressed individuals to peripheral habitats. Efficient conservation of K. carinthiaca will require strict protection of its habitat and ban on forest clear cuts in a buffer zone to prevent invasion of K. arvensis. We demonstrate the large potential of multidisciplinary approaches combining molecular, cytometric, and ecological tools for a reliable inventory and threat assessment of rare species.

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Section: Introductionmentioning

confidence: 56%

“…() and Rešetnik et al. (). We employed the same three primer combinations for the selective PCR as in the previous study (Rešetnik et al.…”

Section: Methodsmentioning

confidence: 99%

“…; Rešetnik et al. ), which includes a few widespread species, but most of the taxa are confined to small areas (Ehrendorfer , ; Rešetnik et al. ).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations