Tags

Type your tag names separated by a space and hit enter

The contribution of haploids, diploids and clones to fine-scale population structure in the seaweed Cladophoropsis membranacea (Chlorophyta).
Mol Ecol. 2002 Mar; 11(3):329-45.ME

Abstract

Local populations of Cladophoropsis membranacea exist as mats of coalesced thalli composed of free-living haploid and diploid plants including clonally reproduced plants of either phase. None of the phases are morphologically distinguishable. We used eight microsatellite loci to explore clonality and fine-scale patch structure in C. membranacea at six sites on the Canary Islands. Mats were always composites of many individuals; not single, large clones. Haploids outnumbered diploids at all sites (from 2:1 to 10:1). In both haploid and diploid plants, genetic diversity was high and there was no significant difference in allele frequencies. Significant heterozygote deficiencies were found in the diploid plants at five out of six sites and linkage disequilibrium was associated with the haploid phase at all sites. Short dispersal distances of gametes/spores and small effective population sizes associated with clonality probably contribute to inbreeding. Spatial autocorrelation analysis revealed that most clones were found within a radius of approximately 60 cm and rarely further than 5 m. Dominance of the haploid phase may reflect seasonal shifts in the relative frequencies of haploids and diploids, but may alternatively reflect superiority of locally adapted and competitively dominant, haploid clones; a strategy that is theoretically favoured in disturbed environments. Although sexual reproduction may be infrequent in C. membranacea, it is sufficient to maintain both life history phases and supports theoretical modelling studies that show that haploid-diploid life histories are an evolutionarily stable strategy.

Links

Publisher Full Text

Authors+Show Affiliations

van der Strate HJ
Department of Marine Biology, Centre for Ecological and Evolutionary Studies, University of Groningen, PO Box 14, 9750 AA Haren, The Netherlands. h.j.van.der.strate@biol.rug.nl
van de Zande L
No affiliation info available
Stam WT
No affiliation info available
Olsen JL
No affiliation info available

MeSH

ChlorophytaClone CellsDiploidyEcosystemGene FrequencyGenetics, PopulationHaploidyMicrosatellite RepeatsModels, Biological

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

11918773

Citation

van der Strate, H J., et al. "The Contribution of Haploids, Diploids and Clones to Fine-scale Population Structure in the Seaweed Cladophoropsis Membranacea (Chlorophyta)." Molecular Ecology, vol. 11, no. 3, 2002, pp. 329-45.
van der Strate HJ, van de Zande L, Stam WT, et al. The contribution of haploids, diploids and clones to fine-scale population structure in the seaweed Cladophoropsis membranacea (Chlorophyta). Mol Ecol. 2002;11(3):329-45.
van der Strate, H. J., van de Zande, L., Stam, W. T., & Olsen, J. L. (2002). The contribution of haploids, diploids and clones to fine-scale population structure in the seaweed Cladophoropsis membranacea (Chlorophyta). Molecular Ecology, 11(3), 329-45.
van der Strate HJ, et al. The Contribution of Haploids, Diploids and Clones to Fine-scale Population Structure in the Seaweed Cladophoropsis Membranacea (Chlorophyta). Mol Ecol. 2002;11(3):329-45. PubMed PMID: 11918773.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The contribution of haploids, diploids and clones to fine-scale population structure in the seaweed Cladophoropsis membranacea (Chlorophyta). AU - van der Strate,H J, AU - van de Zande,L, AU - Stam,W T, AU - Olsen,J L, PY - 2002/3/29/pubmed PY - 2002/5/22/medline PY - 2002/3/29/entrez SP - 329 EP - 45 JF - Molecular ecology JO - Mol Ecol VL - 11 IS - 3 N2 - Local populations of Cladophoropsis membranacea exist as mats of coalesced thalli composed of free-living haploid and diploid plants including clonally reproduced plants of either phase. None of the phases are morphologically distinguishable. We used eight microsatellite loci to explore clonality and fine-scale patch structure in C. membranacea at six sites on the Canary Islands. Mats were always composites of many individuals; not single, large clones. Haploids outnumbered diploids at all sites (from 2:1 to 10:1). In both haploid and diploid plants, genetic diversity was high and there was no significant difference in allele frequencies. Significant heterozygote deficiencies were found in the diploid plants at five out of six sites and linkage disequilibrium was associated with the haploid phase at all sites. Short dispersal distances of gametes/spores and small effective population sizes associated with clonality probably contribute to inbreeding. Spatial autocorrelation analysis revealed that most clones were found within a radius of approximately 60 cm and rarely further than 5 m. Dominance of the haploid phase may reflect seasonal shifts in the relative frequencies of haploids and diploids, but may alternatively reflect superiority of locally adapted and competitively dominant, haploid clones; a strategy that is theoretically favoured in disturbed environments. Although sexual reproduction may be infrequent in C. membranacea, it is sufficient to maintain both life history phases and supports theoretical modelling studies that show that haploid-diploid life histories are an evolutionarily stable strategy. SN - 0962-1083 UR - https://www.unboundmedicine.com/medline/citation/11918773/The_contribution_of_haploids_diploids_and_clones_to_fine_scale_population_structure_in_the_seaweed_Cladophoropsis_membranacea__Chlorophyta__ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0962-1083&date=2002&volume=11&issue=3&spage=329 DB - PRIME DP - Unbound Medicine ER -