Phylogeographic studies in plants: problems and prospects

Schaal, Barbara A.; Hayworth, Douglas A.; Olsen, Kenneth M.; Rauscher, Jason T.; Smith, W. A.

doi:10.1046/j.1365-294x.1998.00318.x

Cited by 1,015 publications

(521 citation statements)

References 78 publications

Supporting

Mentioning

497

Contrasting

Unclassified

Order By: Relevance

“…The genetic structure of plant populations reflects the interactions among different factors, including the long-term evolutionary history of the species, genetic drift, mating system, gene flow and selection (Burgarella et al, 2007;Schaal et al, 1998). Geographically disjunct populations showed higher genetic structure than populations with more continuous distributions (Hamrick and Godt 1996;Premoli et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

Genetic structure of Tunisian natural carob tree (Ceratonia siliqua L.) populations inferred from RAPD markers

et al. 2008

View full text Add to dashboard Cite

Abstract• Seven RAPD markers were used to assess the genetic diversity and structure of ten Tunisian natural Ceratonia siliqua L. populations from different geographic and bioclimatic zones.• The species maintain a high diversity within population as estimated by the percentage of polymorphic loci and Shannon's index (P% = 76.31, H pop = 0.569). The range of variation between populations was large. Populations from the upper semi-arid bioclimates, with more continuous distribution area showed the highest level of variation.• A high genetic differentiation among populations (Φ ST = 0.250 and G ST = 0.347), as a result of population isolation was revealed. Nevertheless, the genetic structure is in accordance with bioclimate indicating that ecological factors also should influence differentiation. Populations from the sub-humid, upper semi-arid and mean semi-arid zones clustered together and were distinct from those of the lower semi-arid ones.• Conservation strategy should be made according to the level of polymorphism within population and bioclimate.Mots-clés : diversité génétique / RAPD / Ceratonia siliqua / populations naturelles / bioclimat / conservation Résumé -Structure génétique des populations naturelles du caroubier (Ceratonia siliqua L.) en Tunisie estimée par les marqueurs RAPD.• Sept marqueurs RAPD ont été utilisés pour analyser la diversité et la structure génétique de dix populations tunisiennes de caroubier (Ceratonia siliqua L.) prospectées dans différentes zones géo-graphiques et bioclimatiques.• L'espèce maintient une diversité génétique intra population importante (P% = 76.31 ; H pop = 0.569) et les niveaux de variation diffèrent selon les populations. Celles du subhumide et du semi-aride supérieur, à aire de distribution plus continue, ont montré la variation la plus importante.• Une forte différenciation (Φ ST = 0.250 et G ST = 0.347) entre les populations, due à leur fragmentation récente, est observée. Toutefois, cette différenciation concorde avec le bioclimat des sites témoi-gnant l'influence des facteurs écologiques dans cette différenciation. Les populations du subhumide, du semi-aride supérieur et du semi-aride moyen constituent un groupe distinct de celui représenté par les populations du semi-aride inférieur.• La conservation des populations doit tenir compte de leur niveau de diversité génétique intra population et du bioclimat.

show abstract

Section: Discussionmentioning

confidence: 99%

Genetic structure of Tunisian natural carob tree (Ceratonia siliqua L.) populations inferred from RAPD markers

et al. 2008

View full text Add to dashboard Cite

show abstract

“…It suggests absence of local effects on the specific adaptability of provenances. The evolutionary history of a region determines the distribution of the genetic variability within and among populations of a given species [2,9,33]. In other plant, important clinal effects have been found e.g.…”

Section: Discussionmentioning

confidence: 99%

Morphological evaluation of cork oak (Quercus suber): Mediterranean provenance variability in Tunisia

Gandour

Khouja

Toumi³

et al. 2007

Ann. For. Sci.

View full text Add to dashboard Cite

-Twenty-six provenances (2 340 plants) of cork oak (Quercus suber spp.) originating from Portugal, Spain, Italy, Morocco, Algeria, and Tunisia were tested for genetic variation among and within provenances by growth traits. Seven morphometrical characters were measured in 90 plants from each provenance. Analysis of variance showed highly significant differences for all characters. The phenotypic coefficient of differentiation reached 0.24 for the form and 0.22 for height, thus revealing a strong structuring between the provenances. Comparative study of growth among the provenances revealed more vigorous growth and better survival rate for those from Morocco, Spain, and Portugal, which may constitute better materials for afforestation. Furthermore, this variability appeared to be geographically structured and would be mainly genetically controlled, as cork oak provenances were cultivated under the same environmental conditions. Our results should be helpful for guide forest managers in afforestation. Quercus suber / variabilité génétique / reforestation / plantes méditerranéennes

show abstract

“…Analysis of genetic variation in the chloroplast genome allows the elucidation of historical factors influencing genetic variation (Schaal et al, 1998). The reduced effective population size of haploid genomes combined with the restricted nature of gene flow through seed dispersal makes maternally inherited organelle markers more likely to record the effects of population history in present-day genetic patterns than nuclear markers (Ennos et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…The reduced effective population size of haploid genomes combined with the restricted nature of gene flow through seed dispersal makes maternally inherited organelle markers more likely to record the effects of population history in present-day genetic patterns than nuclear markers (Ennos et al, 1999). Although contemporary gene flow can also influence the distribution of organelle variation, the pattern of distribution often allows differentiation of the effects of historical factors from those of recent origin (Templeton et al, 1990;Schaal et al, 1998). There are some limitations in the use of cpDNA to investigate phylogeographic patterns in plants due to the often low level of variation within species and the slow rate of evolution compared to animal mitochondrial DNA.…”

Section: Introductionmentioning

confidence: 99%

Phylogeography and divergence in the chloroplast genome of Western Australian Sandalwood (Santalum spicatum)

Byrne¹,

MacDonald²,

Brand³

2003

Heredity

View full text Add to dashboard Cite

Western Australian sandalwood (Santalum spicatum) is widespread throughout Western Australia across the semiarid and arid regions. The diversity and phylogeographic patterns within the chloroplast genome of S. spicatum were investigated using restriction fragment length polymorphism analysis of 23 populations. The chloroplast diversity was structured into two main clades that were geographically separated, one centred in the southern (semiarid region) and the other in the northern (arid) region. Fragmentation due to climatic instability was identified as the most likely influence on the differentiation of the lineages. The lineage in the arid region showed a greater level of differentiation than that in the southern region, suggesting a higher level of gene flow or a more recent range expansion of sandalwood in the southern region. The phylogeographic pattern in the chloroplast genome is congruent with that detected in the nuclear genome, which identified different genetic influences between the regions and also suggested a more recent expansion of sandalwood in the southern region.

show abstract

Phylogeographic studies in plants: problems and prospects

Cited by 1,015 publications

References 78 publications

Genetic structure of Tunisian natural carob tree (Ceratonia siliqua L.) populations inferred from RAPD markers

Genetic structure of Tunisian natural carob tree (Ceratonia siliqua L.) populations inferred from RAPD markers

Morphological evaluation of cork oak (Quercus suber): Mediterranean provenance variability in Tunisia

Phylogeography and divergence in the chloroplast genome of Western Australian Sandalwood (Santalum spicatum)

Contact Info

Product

Resources

About