Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/252
Title: Allozyme diversity in three endemic species of cistus (cistaceae) from the Canary Islands: intraspecific and interspecific comparisons and implications for genetic conservation
Authors: Batista Hernández, Francisco
Bañares Baudet, Angel
Caujapé Castells, J.
Carqué Gil, Eduardo
Marrero Gómez, Manuel
Sosa, PA 
UNESCO Clasification: 241714 Genética vegetal
2417 Biología vegetal (botánica)
Keywords: Adaptive Radiation
Natural-Populations
Hawaiian-Islands
Differentiation
Asteraceae
Isozyme
Size
Flow
Electrophoresis
Caryophyllaceae
Issue Date: 2001
Journal: American journal of botany 
Abstract: Patterns of variation at 13 isozyme loci were examined in 11 populations in three Cistus species strictly endemic to the Canary Islands. Cistus osbaeckiaefolius and C. chinamadensis display low levels of isozyme variation associated with moderate to high interpopulation differentiation, which probably arose through historical bottlenecks in a landscape of habitat fragmentation, grazing, and human influence. By contrast, C. symphytifolius ranks among the subset of narrow endemics with high levels of isozyme variation and features different degrees of genetic structuring that are closely associated with taxonomic ascription. Low interpopulation differentiation in var. leucophyllus is possibly a reflection of its recent origin or of moderate levels of gene flow between its populations. High interpopulation differentiation in var. symphytifolius probably arose due to slight ecological differences between populations coupled with low levels of gene flow. Interpretation of neighbor-joining trees in the light of geological data substantiates the hypothesis that C. symphytifolius (or a very close relative) might be the ancestor of the other stands of Cistus in the islands. Conservation implications of our survey are the identification of the two populations of C. chinamadensis with the highest allele and genotype richness for preservation on genetic grounds and advice to prevent artificial gene flow in this taxon test it might disrupt locally adapted gene combinations. All populations of C. osbaeckiaefolius should be given conservation priority on ecological grounds despite their genetic depauperation.
URI: http://hdl.handle.net/10553/252
ISSN: 0002-9122
DOI: 10.2307/3558402
Source: American Journal Of Botany[ISSN 0002-9122],v. 88 (9), p. 1582-1592
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