Abstract Detail

Biogeography

Mandak, Bohumil [1], Douda, Jan [2], Doudova, Jana [1], Drasnarova, Alena [1], Krak, Karol [1], Vit, Petr [1], Hadincova, Veroslava [3].

Geographic distribution and the origin of the two cytotypes of Alnus glutinosa in Europe.

During the study of both Alnus glutinosa and A. incana species in Europe, we recognised that some collected individuals of A. glutinosa from Dynaric Alps are not diploids as have been mostly reported from Europe by many authors, but tetraploids. The occurrence of previously nearly unknown ploidy level has started up the study exploring patterns of geographical distribution of the cytotypes in Europe. From that reason a large sampling study of A. glutinosa in Europe was performed. The following questions were addressed. (1) What are the frequencies and distribution patterns of plants of different ploidy levels in Europe? (2) Do populations with cytotype mixture exist? (3) Are particular cytotypes restricted to some geographical areas? (3) What is the origin of tetraploid cytotype? Specifically, do tetraploids evolve by autopolyploidy or are they a result of hybridization with A. incana followed by polyploidization event? The distribution of particular ploidy levels in Europe and North Africa deviated from random pattern significantly. Diploid populations prevailed in south-eastern, eastern, western, central and northern Europe. Tetraploids populations occupied two geographically separated areas, one situated in Iberian Peninsula (Portugal, Spain) and North Africa (Morocco), the other in Dynaric Alps and adjacent areas covering Greece, Albania, Montenegro, Serbia and Bosnia and Herzegovina. Mixed populations, consisting of all three ploidy levels were found in contact zone between area dominated by tetraploids in Dynaric Alps and diploids in two populations. These populations represent contact zone between diploids and tetraploids with putative triploid hybrids between the two predominant ploidy levels. No mixed populations were found in Iberian Peninsula and North Africa.

1 - Institute of Botany, Academy of Sciences of the Czech Republic, Genetic Ecology, Zamek 1, Pruhonice, 25243, Czech Republic
2 - Faculty of Environmental Sciences, Czech University of Life Sciences P, Ecology, Kamýcká 129, Prague, 165 21, Czech Republic
3 - Institute of Botany, Academy of Sciences of the Czech Republic, Population Ecology, Zamek 1, Pruhonice, 25243, Czech Republic

Keywords:
Alnus
polyploidization
hybridization 
microsatellites
species distribution modeling
population genetics.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Eyrie/Boise Centre
Date: Monday, July 28th, 2014
Time: 5:30 PM
Number: PBG012
Abstract ID:550
Candidate for Awards:None