High genetic diversity in the only known population of Aechmea tuitensis (Bromeliaceae)

Izquierdo, L. Y. and Pinero, D. (2000) High genetic diversity in the only known population of Aechmea tuitensis (Bromeliaceae). Australian Journal of Botany, 48 5: 645-650. doi:10.1071/BT99043

Author Izquierdo, L. Y.
Pinero, D.
Title High genetic diversity in the only known population of Aechmea tuitensis (Bromeliaceae)
Journal name Australian Journal of Botany   Check publisher's open access policy
ISSN 0067-1924
Publication date 2000
Sub-type Article (original research)
DOI 10.1071/BT99043
Volume 48
Issue 5
Start page 645
End page 650
Total pages 6
Place of publication Melbourne
Publisher CSIRO Publishing
Collection year 2000
Language eng
Subject C1
270203 Population and Ecological Genetics
780105 Biological sciences
0605 Microbiology
0607 Plant Biology
Abstract Aechmea tuitensis (P. Magaba and E. Lott) is a narrow endemic species from Mexico. Only one population has been reported. We studied the genetic variation and structure, and clonal diversity of this rare bromeliad by using starch gel electrophoresis. Six enzyme systems encoded by nine gene loci were resolved in nine subpopulations. The percentage of polymorphic loci was high (77.8%). Mean expected heterozygosity for the population was 0.12. All loci except CPX-1 were in Hardy-Weinberg equilibrium. Genetic diversity was substantially larger within subpopulations (mean F-is = 0.631) than between them (F-st = 0.196). We detected 33 genetically distinguishable clones from 109 plants (ramets) sampled. One clone had a frequency of 32.1%, others showed frequencies ranging from 1.8 to 9.2%, and 19% of the total samples were unique multilocus genotypes. Aechmea tuitensis exhibits high genetic diversity even though it has an extremely narrow distribution. Our results also suggest that the effect of genetic drift on genetic structure in A. tuitensis might be counteracted by the influence of vegetative reproduction.
Keyword Plant Sciences
Clonal Diversity
Allozyme Variation
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Agriculture and Food Sciences
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Created: Tue, 10 Jun 2008, 13:02:40 EST