Flora Europaea

Tütin, T. G.; Heywood, V. H.; Burgess, N. A.; Moore, David; Valentine, D. H.; Walters, S. M.; Webb, David

doi:10.2307/1218149

Cited by 145 publications

(66 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Trees of both Q. afares and Q. canariensis can reach 25-30 m in height and constitute dense stands. Leaf morphology in Q. afares is intermediate between that of Q. suber and of Q. canariensis (Maire, 1961;Tutin et al, 1993). With regard to ecological requirements, Q. afares and Q. suber do not occur on limestone, whereas Q. canariensis is indifferent to substrate.…”

Section: Methodsmentioning

confidence: 99%

“…However, closer examination indicates that Q. afares combines morphological, physiological and ecological traits of the semideciduous Q. canariensis Willd. and the evergreen Q. suber species (Boudy, 1959;Maire, 1961;Tutin et al, 1993), from the genetically very distant subsections Quercus Ö rsted (European white oaks) and Cerris Spach, respectively (Manos et al, 1999). The fossil record shows that these two subsections were already very distinct at the end of the Tertiary period (Kvacek and Walther, 1989).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Endemic North African Quercus afares Pomel originates from hybridisation between two genetically very distant oak species (Q. suber L. and Q. canariensis Willd.): evidence from nuclear and cytoplasmic markers

Mir

Toumi²,

Jarne

et al. 2005

Heredity

View full text Add to dashboard Cite

Hybridisation is a potent force in plant evolution, although there are few reported examples of stabilised species that have been created through homoploid hybridisation. We focus here on Quercus afares, an endemic North African species that combines morphological, physiological and ecological traits of both Q. suber and Q. canariensis, two phylogenetically distant species. These two species are sympatric with Q. afares over most of its distribution. We studied two Q. afares populations (one from Algeria and one from Tunisia), as well as several populations of both Q. suber and Q. canariensis sampled both within and outside areas where these species overlap with Q. afares. A genetic analysis was conducted using both nuclear (allozymes) and chloroplastic markers, which shows that Q. afares originates from a Q. suber Â Q. canariensis hybridisation. At most loci, Q. afares predominantly possesses alleles from Q. suber, suggesting that the initial cross between Q. suber and Q. canariensis was followed by backcrossing with Q. suber. Other hypotheses that can account for this result, including genetic drift, gene silencing, gene conversion and selection, are discussed. A single Q. suber chlorotype was detected, and all Q. afares individuals displayed this chlorotype, indicating that Q. suber was the maternal parent. Q. afares is genetically, morphologically and ecologically differentiated from its parental species, and can therefore be considered as a stabilised hybrid species.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Endemic North African Quercus afares Pomel originates from hybridisation between two genetically very distant oak species (Q. suber L. and Q. canariensis Willd.): evidence from nuclear and cytoplasmic markers

Mir

Toumi²,

Jarne

et al. 2005

Heredity

View full text Add to dashboard Cite

show abstract

“…Indeed the XX/XY1Y2 system has been referred to as "conservative" by one author (Love, 1969). Although the taxonomy of this group is confused (Tutin, 1964), a number of well-defined, morphologically-distinct entities can be distinguished, occupying a range of habitats from montane to semi-arid, and both perennial and annual. Cytological studies of four species have been carried out to provide informative parallels to the cytological analysis of R. acetosa.…”

Section: Introductionmentioning

confidence: 99%

Recurrent patterns of chromosome variation in a species group

Wilby

Parker

1988

Heredity

View full text Add to dashboard Cite

The chromosome characteristics of five closely-related species in Rumex subgenus Acetosa are considered. All are dioecious diploids with 2n = 12+XX in females and 2n = 12+XY1Y2 in males. The autosomes of all species are very similar, all highly acrocentric and displaying apparent homoeology, and only two chromosome changes have occurred in the evolution of the group -shift of an NOR and deletion of part of the long arm of chromosome 6. The heterochromatic V-chromosomes are more variable and only two species cannot be identified by examination of the Vs alone. Hypervariability in centromere location is characteristic of Vs in the whole subgenus although there is no quantitative variation in heterochromatin. On the autosomes, parallel polymorphisms for heterochromatic supernumerary segments on the short arms of pairs 1, 5 and 6 are found in 4 of the 5 species, and euchromatic B-chromosomes are common in three species. These recurrent patterns of chromosome variation emphasise the close relationships within the species group.

show abstract

“…We documented the origin and the status of each species, i.e. whether it is native to Europe or not (Tutin et al, 1980), and whether it is a native, naturalized alien or non naturalized alien species in Switzerland (Lauber and Wagner, 2007).…”

Section: Study Site and Flower Visitor Observationsmentioning

confidence: 99%

Non-naturalized alien plants receive fewer flower visits than naturalized and native plants in a Swiss botanical garden

Razanajatovo

Föhr

Fischer

et al. 2015

Biological Conservation

View full text Add to dashboard Cite

a b s t r a c tMany animal pollinated plant species have been introduced to non native regions without their usual pollinators. Nevertheless, some of these alien species managed to establish reproducing naturalized pop ulations, which might negatively affect native plants. Recent studies have shown that many naturalized alien species can readily attract native pollinators. However, it is not known whether alien species that have not established naturalized populations are less successful in attracting pollinators. Therefore, we tested whether flower visitation rates are lower for non naturalized aliens than for naturalized alien and native species. We conducted a comparative study on flower visitation of 185 native, 37 naturalized alien and 224 non naturalized alien plant species in the Botanical Garden of Bern, Switzerland. Our phylogenetically corrected analyses showed that non naturalized alien species received fewer flower visitors than both naturalized alien and native species. Native, naturalized alien and non naturalized alien species were visited by similar flower visitor communities. Furthermore, among the naturalized alien species, the ones with a broader distribution range in Switzerland received a more diverse set of flower visitors. Although it has been suggested that most alien plants can readily integrate into native plant pollinator networks, we show evidence that the capacity to attract flower visitors in non native regions is different for naturalized and non naturalized alien plants. Therefore, we conclude that successful naturalization of alien plants may be related to flower visitation.

show abstract

Flora Europaea

Cited by 145 publications

References 0 publications

Endemic North African Quercus afares Pomel originates from hybridisation between two genetically very distant oak species (Q. suber L. and Q. canariensis Willd.): evidence from nuclear and cytoplasmic markers

Endemic North African Quercus afares Pomel originates from hybridisation between two genetically very distant oak species (Q. suber L. and Q. canariensis Willd.): evidence from nuclear and cytoplasmic markers

Recurrent patterns of chromosome variation in a species group

Non-naturalized alien plants receive fewer flower visits than naturalized and native plants in a Swiss botanical garden

Contact Info

Product

Resources

About