Genetic variation and conservation of the endangered endemic Anagyris latifolia Brouss. ex Willd. (Leguminosae) from the Canary Islands

González‐Pérez, M. A.; Sosa, Pedro A.; Batista, Francisco

doi:10.1007/s00606-009-0146-z

Cited by 17 publications

(13 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the same time, our data showed that total genetic diversity at species level was higher in widespread R. angustifolius and R. rumelicus compared with the insular endemic R. osiliensis (Table 4). This result is in agreement with many other studies, which found that endemics nearly always had lower levels of genetic diversity compared with common species (Gonzales and Hamrick 2005;Gibson et al 2008;Gonzales-Perez et al 2009;Talve et al 2011). The genetic variation in populations of R. angustifolius varied considerably.…”

Section: Discussionsupporting

confidence: 95%

Genetic diversity and differentiation in six species of the genus Rhinanthus (Orobanchaceae)

Oja

Talve

2012

Plant Syst Evol

View full text Add to dashboard Cite

The intricate genus Rhinanthus L. contains many taxonomically unresolved taxa. The assessment of genetic diversity may clarify the differentiation and taxonomic relationships between species and help to determine their mating system, which is important for understanding the future prospects of populations and species. Isozymes were used to assess the mating system, genetic diversity, and differentiation in R. rumelicus, R. osiliensis, R. wagneri, R. alectorolophus, and R. angustifolius from sect. Cleistolemus and R. minor from sect. Rhinanthus. Genetic diversity at species level was found to be higher in widespread R. angustifolius and R. rumelicus compared with insular endemic R. osiliensis. Positive inbreeding coefficient revealed dominant inbreeding in endemic R. osiliensis and R. wagneri. We also detected a significant departure from Hardy-Weinberg equilibrium in some populations of R. rumelicus and R. angustifolius. The common R. alectorolophus and R. minor and several populations of R. rumelicus and R. angustifolius displayed a mixed mating mode. Six studied species divided into three distinct clusters. Rhinanthus alectorolophus was the most differentiated taxon among the investigated species. The species of sect. Cleistolemus formed two distinct groups. The first cluster consisted only of R. alectorolophus while another comprised R. rumelicus, R. osiliensis, R. wagneri, and R. angustifolius, indicating their close affinity. Thus, our isozyme results call into question the monophyly of section Cleistolemus and the taxonomic position of R. alectorolophus.

show abstract

Section: Discussionsupporting

confidence: 95%

Genetic diversity and differentiation in six species of the genus Rhinanthus (Orobanchaceae)

Oja

Talve

2012

Plant Syst Evol

View full text Add to dashboard Cite

show abstract

“…microcarpa ( H o = 0.651; Table 3) together with the relatively high levels of gene diversity ( H e = 0.410; Table 3) and the detection of just one monomorphic locus are unexpected results for rare insular species and may represent the genetic effects of the high allelic divergence driven by clonality (Halkett et al 2005). Support for this interpretation comes from the observation that, contrary to our results in R. microcarpa , low values of genetic diversity were found for sexually reproducing Canarian endangered species ( H e = 0.2 for Anagyris latifolia , González-Pérez et al 2009; H o = 0.113, H e = 0.306 for Lotus kunkelii , Oliva-Tejera et al 2006; H o = 0.100, H e = 0.112 for Cistus chinamadensis ssp. gomerae , Batista et al 2001), while values of genetic diversity were similar to those found in this study for other endangered clonal species such as the Canarian endemic Sambucus palmensis ( H o = 0.550, H e = 0.499; Sosa et al 2010) and the Southern Appalachian endemic Spiraea virginiana ( H o = 0.503, H e = 0.391; Brzyski and Culley 2011).…”

Section: Discussioncontrasting

confidence: 86%

Effects of clonality on the genetic variability of rare, insular species: the case of Ruta microcarpa from the Canary Islands

Meloni

Reid

Caujapé‐Castells

et al. 2013

Ecology and Evolution

View full text Add to dashboard Cite

Many plant species combine sexual and clonal reproduction. Clonal propagation has ecological costs mainly related to inbreeding depression and pollen discounting; at the same time, species able to reproduce clonally have ecological and evolutionary advantages being able to persist when conditions are not favorable for sexual reproduction. The presence of clonality has profound consequences on the genetic structure of populations, especially when it represents the predominant reproductive strategy in a population. Theoretical studies suggest that high rate of clonal propagation should increase the effective number of alleles and heterozygosity in a population, while an opposite effect is expected on genetic differentiation among populations and on genotypic diversity. In this study, we ask how clonal propagation affects the genetic diversity of rare insular species, which are often characterized by low levels of genetic diversity, hence at risk of extinction. We used eight polymorphic microsatellite markers to study the genetic structure of the critically endangered insular endemic Ruta microcarpa. We found that clonality appears to positively affect the genetic diversity of R. microcarpa by increasing allelic diversity, polymorphism, and heterozygosity. Moreover, clonal propagation seems to be a more successful reproductive strategy in small, isolated population subjected to environmental stress. Our results suggest that clonal propagation may benefit rare species. However, the advantage of clonal growth may be only short-lived for prolonged clonal growth could ultimately lead to monoclonal populations. Some degree of sexual reproduction may be needed in a predominantly clonal species to ensure long-term viability.

show abstract

“…Understanding the level and apportionment of genetic diversity within and among populations is especially important for the conservation of island endemics because being island plants may make them even more susceptible to extinction (Frankham 1998;Prohens et al 2007). In this sense, there are growing conservation genetics studies on Canary endemic flora Batista et al 2004;Kim et al 2005;González-Pérez et al 2004a, 2008, 2009aOliva-Tejera et al 2006;MoraVicente et al 2009;Suarez-García et al 2009). Also, neutral hypervariable markers are useful in estimating the relative evolutionary importance of genetic factors such as mutation rates, gene flow, and genetic drift (González-Pérez et al 2004b, 2009b, 2009cSegarra-Moragues et al 2005;Van Geert et al 2008).…”

Section: Introductionmentioning

confidence: 94%

Conservation genetics of the endangered endemic Sambucus palmensis Link (Sambucaceae) from the Canary Islands

et al. 2010

View full text Add to dashboard Cite

Five polymorphic microsatellites (simple sequence repeat; SSR) markers were used to estimate the levels of genetic variation within and among natural populations from different islands of the endangered endemic from the Canary Islands Sambucus palmensis Link (Sambucaceae). Genetic data were used to infer potential evolutionary processes that could have led to present genetic differentiation among islands. The levels of genetic variability of S. palmensis were considerably high; proportion of polymorphic loci (P = 100%), mean number of alleles per locus (A = 6.8), average expected heterozygosity (He = 0.499). In spite of its small population size and endemic character, 58 different multilocus genotypes were detected within the 165 individuals analyzed. All samples located in different islands always presented different multilocus genotypes. Principal Coordinates Analysis, genetic differentiation analysis (F ST and G ST 0 ) and Bayesian Cluster Analysis revealed significant genetic differences among populations located in different islands. However, this genetic differentiation was not recorded among Tenerife and La Gomera populations, possibly revealing the uncontrolled transfer of material between both islands. AMOVA analysis attributed 77% of the variance to differences within populations, whereas 8% was distributed between islands. The levels of genetic differentiation observed among populations, and the genetic diversity distribution within populations in S. palmensis, indicate that management should aim to conserve as many of the small populations as possible. Concentrating conservation efforts only on the few large populations would result in the likelihood of loss of genetic variability for the species.

show abstract

Genetic variation and conservation of the endangered endemic Anagyris latifolia Brouss. ex Willd. (Leguminosae) from the Canary Islands

Cited by 17 publications

References 46 publications

Genetic diversity and differentiation in six species of the genus Rhinanthus (Orobanchaceae)

Genetic diversity and differentiation in six species of the genus Rhinanthus (Orobanchaceae)

Effects of clonality on the genetic variability of rare, insular species: the case of Ruta microcarpa from the Canary Islands

Conservation genetics of the endangered endemic Sambucus palmensis Link (Sambucaceae) from the Canary Islands

Contact Info

Product

Resources

About