Spatial ecological and genetic structure of a mixed population of sexual diploid and apomictic triploid dandelions

Autor:	E.C. Vlot, J.C.M. den Nijs, Steph B. J. Menken, Patrick G. Meirmans
Rok vydání:	2003
Předmět:	education.field_of_study Ecology fungi Population food and beverages Biology Gene flow Apomixis Genetic structure Genetic variation Spatial ecology Ploidy education Ecology Evolution Behavior and Systematics Isolation by distance
Zdroj:	Journal of Evolutionary Biology. 16:343-352
ISSN:	1420-9101 1010-061X
DOI:	10.1046/j.1420-9101.2003.00515.x
Popis:	Ecological differentiation is widely seen as an important factor enabling the stable coexistence of closely related plants of different ploidy levels. We studied ecological and genetic differentiation between co-occurring sexual diploid and apomictic triploid Taraxacum section Ruderalia by analysing spatial patterns both in the distribution of cytotypes and in the distribution of genetic variation within and between the cytotypes. A significant relationship between ploidy level and elevation was found. This mode of ecological differentiation however, was not sufficient to explain the significant spatial structure in the distribution of diploids and triploids within the population. Strong congruence was found between the spatial genetic patterns within the diploids and within the triploids. We argue that this congruence is an indication of gene flow between neighbouring plants of different ploidy levels.
Databáze:	OpenAIRE
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