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Statements

Subject Item
n2:RIV%2F61989592%3A15310%2F12%3A33141213%21RIV13-GA0-15310___
rdf:type
n15:Vysledek skos:Concept
dcterms:description
Perennial grasses belonging to the genus Molinia are widespread in most of Europe and consist of a polyploid complex of closely related taxa with a confusing taxonomy. Based on extensive sampling at 241 localities in Europe, four cytotypes were identified based on chromosome counts and results of flow cytometry: tetraploids (2n = 36), hexaploids (2n = 54), octoploids (2n = 72) and dodecaploids (2n = 108). While tetra- and dodecaploids were commonly recorded, octoploids were less common and only two hexaploid individuals were identified. Previously reported decaploid counts (2n = 90) from central Europe are probably erroneous and refer to 2n = 108. The tetraploid cytotype is distributed throughout Europe and broadly sympatric with other cytotypes. Octo- and dodecaploids were spatially separated with dodecaploids occurring in the western, central and south-central part of Europe and octoploids in the east-central and southeastern part of Europe. All quantitative characters measured (lengths of lemmas, anthers, caryopses and stomata, lengths of the longest hair on the callus and diameter of the culm below the panicle) showed a linear trend across ploidy levels. Tetra-, octo- and dodecaploid cytotypes formed almost non-overlapping groupings in principal component and discriminant analyses of morphological characters. The following taxonomic concept of this complex is proposed: Molinia caerulea (L.) Moench is a predominantly tetraploid taxon incorporating very rarely reported hexaploid and perhaps also diploid plants; higher cytotypes (2n = 8x, 12x) are considered to be M. arundinacea Schrank, consisting of two subspecies: a dodecaploid subspecies occurring in the southern and western part of central Europe and the octoploid Molinia arundinacea subsp. freyi Dančák in east-central and southeastern Europe. Perennial grasses belonging to the genus Molinia are widespread in most of Europe and consist of a polyploid complex of closely related taxa with a confusing taxonomy. Based on extensive sampling at 241 localities in Europe, four cytotypes were identified based on chromosome counts and results of flow cytometry: tetraploids (2n = 36), hexaploids (2n = 54), octoploids (2n = 72) and dodecaploids (2n = 108). While tetra- and dodecaploids were commonly recorded, octoploids were less common and only two hexaploid individuals were identified. Previously reported decaploid counts (2n = 90) from central Europe are probably erroneous and refer to 2n = 108. The tetraploid cytotype is distributed throughout Europe and broadly sympatric with other cytotypes. Octo- and dodecaploids were spatially separated with dodecaploids occurring in the western, central and south-central part of Europe and octoploids in the east-central and southeastern part of Europe. All quantitative characters measured (lengths of lemmas, anthers, caryopses and stomata, lengths of the longest hair on the callus and diameter of the culm below the panicle) showed a linear trend across ploidy levels. Tetra-, octo- and dodecaploid cytotypes formed almost non-overlapping groupings in principal component and discriminant analyses of morphological characters. The following taxonomic concept of this complex is proposed: Molinia caerulea (L.) Moench is a predominantly tetraploid taxon incorporating very rarely reported hexaploid and perhaps also diploid plants; higher cytotypes (2n = 8x, 12x) are considered to be M. arundinacea Schrank, consisting of two subspecies: a dodecaploid subspecies occurring in the southern and western part of central Europe and the octoploid Molinia arundinacea subsp. freyi Dančák in east-central and southeastern Europe.
dcterms:title
Taxonomy and cytogeography of the Molinia caerulea complex (Poaceae) in Central Europe Taxonomy and cytogeography of the Molinia caerulea complex (Poaceae) in Central Europe
skos:prefLabel
Taxonomy and cytogeography of the Molinia caerulea complex (Poaceae) in Central Europe Taxonomy and cytogeography of the Molinia caerulea complex (Poaceae) in Central Europe
skos:notation
RIV/61989592:15310/12:33141213!RIV13-GA0-15310___
n15:predkladatel
n17:orjk%3A15310
n3:aktivita
n11:P
n3:aktivity
P(GA206/07/0706)
n3:cisloPeriodika
2
n3:dodaniDat
n4:2013
n3:domaciTvurceVysledku
n13:5190703 n13:2588765 n13:1021095
n3:druhVysledku
n9:J
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n19:predkladatel
n3:idSjednocenehoVysledku
173314
n3:idVysledku
RIV/61989592:15310/12:33141213
n3:jazykVysledku
n6:eng
n3:klicovaSlova
chromosome numbers, contact zones, distribution, DNA-ploidy level, flow cytometry, Molinia, polyploidy, taxonomy
n3:klicoveSlovo
n8:distribution n8:taxonomy n8:contact%20zones n8:chromosome%20numbers n8:flow%20cytometry n8:DNA-ploidy%20level n8:Molinia n8:polyploidy
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[AC4C21F13359]
n3:nazevZdroje
Preslia
n3:obor
n16:EF
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n18:GA206%2F07%2F0706
n3:rokUplatneniVysledku
n4:2012
n3:svazekPeriodika
84
n3:tvurceVysledku
Trávníček, Bohumil Duchoslav, Martin Dančák, Martin
n3:wos
000308715500005
s:issn
0032-7786
s:numberOfPages
23
n14:organizacniJednotka
15310