Cochlearia macrorrhiza (Brassicaceae): A bridging species between Cochlearia taxa from the Eastern Alps and the Carpathians?

Koch, Marcus A.; Dobeš, Christoph; Bernhardt, Karl‐Georg; Kochjarová, Judita

doi:10.1007/s00606-003-0048-4

Cited by 28 publications

(34 citation statements)

References 16 publications

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“…Preferences for different types of moist habitats are seen throughout the genus and local adaptation to divergent ecologies has probably been an important driver for speciation 12 .…”

Section: Discussionmentioning

confidence: 99%

RADseq provides evidence for parallel ecotypic divergence in the autotetraploid Cochlearia officinalis in Northern Norway

Brandrud

Paun

Lorenzo

et al. 2017

Sci Rep

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Speciation encompasses a continuum over time from freely interbreeding populations to reproductively isolated species. Along this process, ecotypes – the result of local adaptation – may be on the road to new species. We investigated whether three autotetraploid Cochlearia officinalis ecotypes, adapted to different habitats (beach, estuary, spring), are genetically differentiated and result from parallel ecotypic divergence in two distinct geographical regions. We obtained genetic data from thousands of single nucleotide polymorphisms (SNPs) from restriction-site associated DNA sequencing (RADseq) and from six microsatellite markers for 12 populations to assess genetic divergence at ecotypic, geographic and population level. The genetic patterns support differentiation among ecotypes as suggested by morphology and ecology. The data fit a scenario where the ancestral beach ecotype has recurrently and polytopically given rise to the estuary and spring ecotypes. Several ecologically-relevant loci with consistent non-random segregating patterns are identified across the recurrent origins, in particular around genes related to salt stress. Despite being ecologically distinct, the Cochlearia ecotypes still represent an early stage in the process of speciation, as reproductive isolation has not (yet) developed. A sequenced annotated genome is needed to specifically target candidate genes underlying local adaptation.

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“…Preferences for different types of moist habitats are seen throughout the genus and local adaptation to divergent ecologies has probably been an important driver for speciation 12 .…”

Section: Discussionmentioning

confidence: 99%

RADseq provides evidence for parallel ecotypic divergence in the autotetraploid Cochlearia officinalis in Northern Norway

Brandrud

Paun

Lorenzo

et al. 2017

Sci Rep

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“…This unigeneric tribe consists of Cochlearia (21 spp., including five of Ionopsidium). The genus, which is distributed primarily in Europe, northwestern Africa, and northern North America and Asia, was subjected to extensive molecular studies (Koch 2002;Koch et al 1996Koch et al , 1999bKoch et al , 2003b, and it appeared in a basal polytomy of the family . Although Beilstein et al (2006) studied only one species of Ionopsidium, and it too appeared in a clade of its own in the overall basal polytomy of the family, the results of Koch and colleagues are taken to support the recognition of this unigeneric tribe.…”

Section: Major Cladesmentioning

confidence: 99%

Systematics and phylogeny of the Brassicaceae (Cruciferae): an overview

2006

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Abstract. A critical review of characters used in the systematics of the Brassicaceae is given, and aspects of the origin, classification, and generic delimitation of the family discussed. Molecular phylogenetic studies of the family were reviewed, and major clades identified. Based on molecular studies, especially from the ndhF chloroplast gene, and careful evaluation of morphology and generic circumscriptions, a new tribal alignment of the Brassicaceae is proposed. In all, 25 tribes are recognized, of which seven (Aethionemeae, Boechereae, Descurainieae, Eutremeae, Halimolobeae, Noccaeeae, and Smelowskieae) are described as new. For each tribe, the center(s) of distribution, morphology, and number of taxa are given. Of the 338 genera currently recognized in the Brassicaceae, about 260 genera (or about 77%) were either assigned or tentatively assigned to the 25 tribes. Some problems relating to various genera and tribes are discussed, and future research developments are briefly covered.

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“…Several recently published comprehensive taxonomic studies of the genus Cochlearia (Vogt, 1985, 1987, 1993; Koch, Hurka & Mummenhoff, 1996; Koch et al ., 1998, 1999; Nordal & Stabbetorp, 1990) have been concerned with western and central European taxa, but only marginal attention was paid to Carpathian populations (Koch et al ., 2003). Smejkal (1968) grouped all West Carpathian scurvy grasses into one species, Cochlearia tatrae .…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the systematic position of Romanian Cochlearia has not yet been satisfactorily defined (cf. Jalas, Suominen & Lampinen, 1996: 114; Koch et al ., 2003). The taxonomic classification of these populations has changed repeatedly.…”

Section: Introductionmentioning

confidence: 99%

The genus Cochlearia L. (Brassicaceae) in the Eastern Carpathians and adjacent area

Kochjarová¹,

Valachovič²,

Bureš³

et al. 2006

Botanical Journal of the Linnean Society

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Most European scurvy grasses (including those of the Carpathian Mountains) belong to the nominate section Cochlearia . We analyse the status of two East Carpathian (Romanian) Cochlearia populations by comparing them with the two native species from the Western Carpathians, the diploid Cochlearia pyrenaica (2 n = 2 x = 12; 2C = 0.78 pg) and hexaploid C. tatrae (2 n = 6 x = 42; 2C = 2.09 pg). Using karyological methods and flow cytometry, differences between these taxa were detected. Because of differences in morphology, chromosome number (2 n = 8 x = 48) and DNA content (2C = 2.82 pg), we propose that the East Carpathian (Romanian) populations represent a separate species, Cochlearia borzaeana (Coman et Nyár.) Pobed. The lectotype of C. borzeana is designated. The new subassociation Carici flavae-Cratoneuretum Kovács et Felföldy 1958 cochlearietosum borzeanae is described. An isolated population of C. pyrenaica s.l . from Ukraine (outwith the Carpathian territory) (2 n = 2 x = 12; 2C = 0.91 pg) has been also studied, because of its unclear taxonomic position. The diploid chromosome number, 2 n = 2 x = 12, is given for this single known population of C. pyrenaica s.l . in Ukraine. However, there is considerable difference in genome size and chromosome size between West Carpathian C. pyrenaica s.s . and Ukrainian plants, and taxonomic evaluation of the latter population needs further study. A comparative table with morphological characteristics and a short description of the phytosociological behaviour of C. borzaeana in Romania and taxa from the Western Carpathians are included.

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Cochlearia macrorrhiza (Brassicaceae): A bridging species between Cochlearia taxa from the Eastern Alps and the Carpathians?

Cited by 28 publications

References 16 publications

RADseq provides evidence for parallel ecotypic divergence in the autotetraploid Cochlearia officinalis in Northern Norway

RADseq provides evidence for parallel ecotypic divergence in the autotetraploid Cochlearia officinalis in Northern Norway

Systematics and phylogeny of the Brassicaceae (Cruciferae): an overview

The genus Cochlearia L. (Brassicaceae) in the Eastern Carpathians and adjacent area

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