Genetic diversity in the monoecious hydrophile Ceratophyllum (Ceratophyllaceae)

This study surveys genetic variation in two clonal, monoecious, water-pollinated species that differ in their extent of sexuality and distributional range. Electrophoresis was used to quantify allozyme variability in 12 Wisconsin populations of the widespread Ceratophyllum demersum and the rare C. e...

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Bibliographic Details
Published in:American journal of botany 1991-08, Vol.78 (8), p.1070-1082
Main Author: Les, D.H. (The University of Wisconsin-Milwaukee, Milwaukee, WI)
Format: Article
Language:English
Subjects:
Alleles
ANALISIS CUANTITATIVO
ANALYSE QUANTITATIVE
Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Botany
CERATOPHYLLACEAE
Classification
CLONE
CLONES
Demecology
DISTRIBUCION NATURAL
DISTRIBUTION NATURELLE
ENZIMAS
ENZYME
Fundamental and applied biological sciences. Psychology
Genes
Genetic diversity
Genetic loci
Genetic variation
Genotypes
Lakes
Plant genetics
Plants
Plants and fungi
POLIMORFISMO BIOQUIMICO
POLYMORPHISME BIOCHIMIQUE
Population genetics
RECOMBINACION
RECOMBINAISON
REPRODUCCION SEXUAL
REPRODUCTION SEXUEE
Species diversity
VARIACION GENETICA
VARIATION GENETIQUE
WISCONSIN
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Summary:This study surveys genetic variation in two clonal, monoecious, water-pollinated species that differ in their extent of sexuality and distributional range. Electrophoresis was used to quantify allozyme variability in 12 Wisconsin populations of the widespread Ceratophyllum demersum and the rare C. echinatum. Electrophoretic data indicate that populations of both species have low levels of sexual recombination, low levels of variation, and are structured genetically like inbreeding terrestrial plants. Ceratophyllum populations differ from "typical" clonal terrestrial plants by lower genetic diversity, lower proportions of multiclonal populations, and fewer genotypes per population. In two populations where sexual recombination is documented, heterozygosity is low with significant deficiencies. Monoecy in Ceratophyllum may be related to historical evolutionary factors, whereas vegetative reproduction has a greater influence on the genetic population structure of extant populations. The low genetic identity between C. demersum and C. echinatum supports their recognition as distinct species
ISSN:0002-9122
1537-2197
DOI:10.1002/j.1537-2197.1991.tb14515.x