scholarly journals Cytotype distribution and phylogeography ofHieracium intybaceum(Asteraceae)

2015 ◽  
Vol 179 (3) ◽  
pp. 487-498 ◽  
Author(s):  
Jaroslav Zahradníček ◽  
Jindřich Chrtek
Keyword(s):  
Cytotype Distribution

Cytotype distribution inEmpetrum (Ericaceae) at various spatial scales in the Czech Republic

2004 ◽  
Vol 39 (2) ◽  
pp. 161-171 ◽  
Author(s):  
Jan Suda ◽  
Radka Malcová ◽  
Daniel Abazid ◽  
Marek Banaš ◽  
František Procházka ◽  
...  
Keyword(s):  
Czech Republic ◽  
Spatial Scales ◽  
The Czech Republic ◽  
Cytotype Distribution

scholarly journals Widespread co-occurrence of multiple ploidy levels in fragile ferns (Cystopteris fragilis complex; Cystopteridaceae) probably stems from similar ecology of cytotypes, their efficient dispersal and inter-ploidy hybridization

2018 ◽  
Vol 123 (5) ◽  
pp. 845-855 ◽  
Author(s):  
Kristýna Hanušová ◽  
Martin Čertner ◽  
Tomáš Urfus ◽  
Petr Koutecký ◽  
Jiří Košnar ◽  
...  
Keyword(s):  
Ploidy Level ◽  
Life Form ◽  
Dna Ploidy ◽  
Distribution Patterns ◽  
Climate Data ◽  
Limited Effect ◽  
Ploidy Levels ◽  
Plant Groups ◽  
High Ploidy ◽  
Cytotype Distribution

Abstract Background and Aims Polyploidy has played an important role in the evolution of ferns. However, the dearth of data on cytotype diversity, cytotype distribution patterns and ecology in ferns is striking in comparison with angiosperms and prevents an assessment of whether cytotype coexistence and its mechanisms show similar patterns in both plant groups. Here, an attempt to fill this gap was made using the ploidy-variable and widely distributed Cystopteris fragilis complex. Methods Flow cytometry was used to assess DNA ploidy level and monoploid genome size (Cx value) of 5518 C. fragilis individuals from 449 populations collected over most of the species’ global distributional range, supplemented with data from 405 individuals representing other related species from the complex. Ecological preferences of C. fragilis tetraploids and hexaploids were compared using field-recorded parameters and database-extracted climate data. Key Results Altogether, five different ploidy levels (2x, 4x, 5x, 6x, 8x) were detected and three species exhibited intraspecific ploidy-level variation: C. fragilis, C. alpina and C. diaphana. Two predominant C. fragilis cytotypes, tetraploids and hexaploids, co-occur over most of Europe in a diffuse, mosaic-like pattern. Within this contact zone, 40 % of populations were mixed-ploidy and most also contained pentaploid hybrids. Environmental conditions had only a limited effect on the distribution of cytotypes. Differences were found in the Cx value of tetraploids and hexaploids: between-cytotype divergence was higher in uniform-ploidy than in mixed-ploidy populations. Conclusions High ploidy-level diversity and widespread cytotype coexistence in the C. fragilis complex match the well-documented patterns in some angiosperms. While ploidy coexistence in C. fragilis is not driven by environmental factors, it could be facilitated by the perennial life-form of the species, its reproductive modes and efficient wind dispersal of spores. Independent origins of hexaploids and/or inter-ploidy gene flow may be expected in mixed-ploidy populations according to Cx value comparisons.

scholarly journals High ploidy diversity and distinct patterns of cytotype distribution in a widespread species of Oxalis in the Greater Cape Floristic Region

2013 ◽  
Vol 111 (4) ◽  
pp. 641-649 ◽  
Author(s):  
Jana Krejčíková ◽  
Radka Sudová ◽  
Magdalena Lučanová ◽  
Pavel Trávníček ◽  
Tomáš Urfus ◽  
...  
Keyword(s):  
Cape Floristic Region ◽  
Widespread Species ◽  
High Ploidy ◽  
Cytotype Distribution

Cytotype Distribution and Colonization History of the Steppe PlantIris aphylla

2010 ◽  
Vol 47 (1) ◽  
pp. 23-33 ◽  
Author(s):  
Ada Wróblewska ◽  
Emilia Brzosko ◽  
Ewa Chudzińska ◽  
Sándor Bordács ◽  
Andriy Ivanovych Prokopiv
Keyword(s):  
Colonization History ◽  
History Of ◽  
Cytotype Distribution

scholarly journals Cytotype distribution at a diploid–hexaploid contact zone in Aster amellus (Asteraceae)

2012 ◽  
Vol 110 (5) ◽  
pp. 1047-1055 ◽  
Author(s):  
S. Castro ◽  
J. Loureiro ◽  
T. Procházka ◽  
Z. Münzbergová
Keyword(s):  
Contact Zone ◽  
Cytotype Distribution

scholarly journals Patterns of cytotype distribution and genome size variation in the genusSesleria Scop. (Poaceae)

2015 ◽  
Vol 179 (1) ◽  
pp. 126-143 ◽  
Author(s):  
Maja Lazarević ◽  
Nevena Kuzmanović ◽  
Dmitar Lakušić ◽  
Antun Alegro ◽  
Peter Schönswetter ◽  
...  
Keyword(s):  
Genome Size ◽  
Size Variation ◽  
Genome Size Variation ◽  
Cytotype Distribution

The cytotaxonomy of Solidago nemoralis (Compositae: Astereae)

1990 ◽  
Vol 68 (10) ◽  
pp. 2065-2069 ◽  
Author(s):  
Ronald A. Brammall ◽  
John C. Semple
Keyword(s):  
United States ◽  
North America ◽  
Chromosome Number ◽  
Deciduous Forest ◽  
The United States ◽  
Evolutionary Strategy ◽  
Eastern North America ◽  
Eastern Deciduous Forest ◽  
Forest Region ◽  
Cytotype Distribution

Chromosome number determinations were made from 218 populations of Solidago nemoralis collected throughout the range of the species in Canada and the United States. All individuals of ssp. decemflora were tetraploid (2n = 36; 28 populations); these came from the prairies and adjacent eastern deciduous forest states and provinces. The majority of the collections of ssp. nemoralis were diploid (2n = 18; 161 populations) and came from throughout the eastern deciduous forest region of eastern North America. Tetraploids (2n = 36; 29 populations) of ssp. nemoralis were less frequent and occurred scattered across the eastern and northern portions of the range of the subspecies. The cytotype distribution pattern of the two subspecies of Solidago nemoralis is representative of what appears to be a frequent evolutionary strategy in the goldenrods.

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