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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F13%3A10192189%21RIV14-GA0-11310___
rdf:type
skos:Concept n12:Vysledek
rdfs:seeAlso
http://dx.doi.org/10.1016/j.sajb.2013.05.005
dcterms:description
Contact zones of different cytotypes provide an opportunity to address evolutionary mechanisms underlying the origin, establishment and maintenance of karyological diversity at intraspecific level. We explored the fine-scale distribution of ploidy levels of Oxalis obtusa in seven mixed-ploidy sites in the Western and Northern Cape Provinces, South Africa, and searched for potential isolating barriers promoting assortative mating. Five different ploidy levels (2x, 3x, 4x, 6x and 8x) were detected among 336 samples collected at 112 microsites. The studied sites were inhabited by two (2 sites), three (4 sites) or even all five (1 site) different cytotypes. Despite their sympatric growth, different ploidies show some spatio-ecological segregation. The greatest differences among microsites hosting different cytotypes were found in precipitation parameters. There is a clear altitudinal gradient in ploidy composition in the most ploidy-variable site, Pakhuis Pass. Our results show that a combination of niche partitioning and clumping of same-ploidy individuals due to vegetative reproduction seems to be efficient reproductive barriers, which limit inter-ploidy gene flow in the zones of ploidy contact and contribute to the long-term maintenance of cytotype mixtures in O. obtusa. (C) 2013 SAAB. Published by Elsevier B.V. All rights reserved. Contact zones of different cytotypes provide an opportunity to address evolutionary mechanisms underlying the origin, establishment and maintenance of karyological diversity at intraspecific level. We explored the fine-scale distribution of ploidy levels of Oxalis obtusa in seven mixed-ploidy sites in the Western and Northern Cape Provinces, South Africa, and searched for potential isolating barriers promoting assortative mating. Five different ploidy levels (2x, 3x, 4x, 6x and 8x) were detected among 336 samples collected at 112 microsites. The studied sites were inhabited by two (2 sites), three (4 sites) or even all five (1 site) different cytotypes. Despite their sympatric growth, different ploidies show some spatio-ecological segregation. The greatest differences among microsites hosting different cytotypes were found in precipitation parameters. There is a clear altitudinal gradient in ploidy composition in the most ploidy-variable site, Pakhuis Pass. Our results show that a combination of niche partitioning and clumping of same-ploidy individuals due to vegetative reproduction seems to be efficient reproductive barriers, which limit inter-ploidy gene flow in the zones of ploidy contact and contribute to the long-term maintenance of cytotype mixtures in O. obtusa. (C) 2013 SAAB. Published by Elsevier B.V. All rights reserved.
dcterms:title
The spatio-ecological segregation of different cytotypes of Oxalis obtusa (Oxalidaceae) in contact zones The spatio-ecological segregation of different cytotypes of Oxalis obtusa (Oxalidaceae) in contact zones
skos:prefLabel
The spatio-ecological segregation of different cytotypes of Oxalis obtusa (Oxalidaceae) in contact zones The spatio-ecological segregation of different cytotypes of Oxalis obtusa (Oxalidaceae) in contact zones
skos:notation
RIV/00216208:11310/13:10192189!RIV14-GA0-11310___
n12:predkladatel
n13:orjk%3A11310
n3:aktivita
n20:I n20:S n20:P
n3:aktivity
I, P(GAP506/10/0643), S
n3:cisloPeriodika
neuveden
n3:dodaniDat
n10:2014
n3:domaciTvurceVysledku
n4:5164710 n4:3399060
n3:druhVysledku
n19:J
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n16:predkladatel
n3:idSjednocenehoVysledku
106810
n3:idVysledku
RIV/00216208:11310/13:10192189
n3:jazykVysledku
n8:eng
n3:klicovaSlova
Polyploid; Oxalis obtusa; Niche differentiation; Flow cytometry; Ecology; Cytotype coexistence; Cape Floristic Region; Breeding barrier
n3:klicoveSlovo
n7:Niche%20differentiation n7:Cytotype%20coexistence n7:Cape%20Floristic%20Region n7:Flow%20cytometry n7:Polyploid n7:Oxalis%20obtusa n7:Breeding%20barrier n7:Ecology
n3:kodStatuVydavatele
ZA - Jihoafrická republika
n3:kontrolniKodProRIV
[E1A8022F1D34]
n3:nazevZdroje
South African Journal of Botany
n3:obor
n11:EF
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
5
n3:projekt
n21:GAP506%2F10%2F0643
n3:rokUplatneniVysledku
n10:2013
n3:svazekPeriodika
88
n3:tvurceVysledku
Krejčíková, Jana Dreyer, L. L. Suda, Jan Sudová, R. Oberlander, K.
n3:wos
000328179500009
s:issn
0254-6299
s:numberOfPages
7
n18:doi
10.1016/j.sajb.2013.05.005
n15:organizacniJednotka
11310