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Statements

Subject Item
n2:RIV%2F67985939%3A_____%2F05%3A00030447%21RIV06-AV0-67985939
rdf:type
skos:Concept n20:Vysledek
dcterms:description
Hieracium subgenus Pilosella is an extremely difficult group taxonomically, as it combines apomixis with extensive hybridisation. The study presents a multidisciplinary approach combining DNA fingerprinting and the analysis of chloroplast DNA with morphological-taxonomic studies, cultivation, experimental hybridisation, analysis of ploidy level and mode of reproduction. Several species of a hybridogenous complex were studied in detail at clone, population and species level. Different levels of variability were found in apomictic species that were related to different ages: from near uniformity to variability within the locality. Chloroplast haplotypes formed two major groups and often indicated unidirectional transmission of cpDNA, despite multiple origins of most apomicts. Moreover, often the facultative apomict rather than the sexual species acted as seed parent. Thus, the residual sexuality of the apomicts plays a larger role in the speciation of this group than assumed. Hieracium subgenus Pilosella is an extremely difficult group taxonomically, as it combines apomixis with extensive hybridisation. The study presents a multidisciplinary approach combining DNA fingerprinting and the analysis of chloroplast DNA with morphological-taxonomic studies, cultivation, experimental hybridisation, analysis of ploidy level and mode of reproduction. Several species of a hybridogenous complex were studied in detail at clone, population and species level. Different levels of variability were found in apomictic species that were related to different ages: from near uniformity to variability within the locality. Chloroplast haplotypes formed two major groups and often indicated unidirectional transmission of cpDNA, despite multiple origins of most apomicts. Moreover, often the facultative apomict rather than the sexual species acted as seed parent. Thus, the residual sexuality of the apomicts plays a larger role in the speciation of this group than assumed. Jestřábníky Hieracium subg. Pilosella jsou taxonomicky extrémně složitou skupinou, protože kombinují apomixi s rozsáhlou hybridizací. Studie presentuje multidisciplinární přístup, kombinující DNA fingerprinting, analýzu chloroplastové DNA s morfologickým taxonomickým přístupem, kultivací, experimentálním křížením, analýzami ploidní úrovně a studiem rozmnožování. Některé druhy z hybridogenního komplexu byly detailně studovány na úrovních klon, populace a druh. U apomiktických druhů byly nalezeny různé hladiny variability, které jsou ve vztahu k jejich různému stáří: od jejich jednolitosti až k velké variabilitě uvnitř jedné populace. Chloroplastové haplotypy tvoří dvě hlavní skupiny a často indikuji jednosměrný přenos cpDNA navzdory vícenásobnému původu apomiktických druhů. Navíc často je apomiktický druh a ne sexuální mateřskou rostlinou řady hybridogenních druhů. Residuální sexualita apomiktů tak hraje větší roli při speciaci než se dosud předpokládalo.
dcterms:title
Evolution, hybridisation, and clonal distribution of apo- and amphimictic species of Hieracium subgen. Pilosella (Asteraceae, Lactuceae) in a Central European mountain range Evoluce, hybridizace a klonální distribuce apo- a amfimiktických druhů rodu Hieracium subgen. Pilosella (Asteraceae, Lactuceae) ve středoevropských pohořích Evolution, hybridisation, and clonal distribution of apo- and amphimictic species of Hieracium subgen. Pilosella (Asteraceae, Lactuceae) in a Central European mountain range
skos:prefLabel
Evoluce, hybridizace a klonální distribuce apo- a amfimiktických druhů rodu Hieracium subgen. Pilosella (Asteraceae, Lactuceae) ve středoevropských pohořích Evolution, hybridisation, and clonal distribution of apo- and amphimictic species of Hieracium subgen. Pilosella (Asteraceae, Lactuceae) in a Central European mountain range Evolution, hybridisation, and clonal distribution of apo- and amphimictic species of Hieracium subgen. Pilosella (Asteraceae, Lactuceae) in a Central European mountain range
skos:notation
RIV/67985939:_____/05:00030447!RIV06-AV0-67985939
n3:strany
175;201
n3:aktivita
n9:Z n9:P
n3:aktivity
P(IAA6005203), Z(AV0Z60050516)
n3:dodaniDat
n11:2006
n3:domaciTvurceVysledku
n5:5365864 n5:3525031 n5:3485498 n5:9890513
n3:druhVysledku
n18:C
n3:duvernostUdaju
n8:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
520811
n3:idVysledku
RIV/67985939:_____/05:00030447
n3:jazykVysledku
n14:eng
n3:klicovaSlova
apomixis; Hieracium; hybridization
n3:klicoveSlovo
n4:apomixis n4:Hieracium n4:hybridization
n3:kontrolniKodProRIV
[B0791F3BAA76]
n3:mistoVydani
Königstein
n3:nazevZdroje
Plant species-level systematics: new perspectives on pattern & process
n3:obor
n12:EF
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
7
n3:projekt
n13:IAA6005203
n3:rokUplatneniVysledku
n11:2005
n3:tvurceVysledku
Bräutigam, E. Chrtek, Jindřich Krahulec, František Krahulcová, Anna Šimek, R. Bräutigam, S. Fehrer, Judith
n3:zamer
n7:AV0Z60050516
s:numberOfPages
27
n10:hasPublisher
Koeltz
n19:isbn
3-906166-39-2