Cupule and acorn basic morphological differences between Quercus ithaburensis Decne. subsp. ithaburensis and Quercus ithaburensis subsp. macrolepis (Kotschy) Hedge &amp; Yalt.

Ertaş, Aytekin; Dufour-Dror, Jean-Marc

doi:10.24310/abm.v27i0.7332

Cited by 10 publications

(7 citation statements)

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“…The detected genetic diversity at the plastid and, especially, the nuclear markers ( Table 5 ) clearly indicates the genetic isolation from the rest of the Cerris oaks and progressive inter-specific differentiation. Geographic, morphological and ecological differences are also evident in Q. ithaburensis and Q. macrolepis ( Dufour-Dror & Ertas, 2002 ; Dufour-Dror & Ertas, 2004 ). On these grounds and considering the high inter-taxon 5S-IGS divergence supported by the different haplotypes ( Tables 2 – 4 ), we suggest these two forms be treated as separate species (cf.…”

Section: Discussionmentioning

confidence: 99%

Comparative systematics and phylogeography ofQuercusSectionCerrisin western Eurasia: inferences from plastid and nuclear DNA variation

Simeone

Cardoni

Piredda

et al. 2018

PeerJ

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Oaks (Quercus) comprise more than 400 species worldwide and centres of diversity for most sections lie in the Americas and East/Southeast Asia. The only exception is the Eurasian sect. Cerris that comprises about 15 species, most of which are confined to western Eurasia. This section has not been comprehensively studied using molecular tools. Here, we assess species diversity and provide a first comprehensive taxonomic and phylogeographic scheme of western Eurasian members of sect. Cerris using plastid (trnH-psbA) and nuclear (5S-IGS) DNA variation with a dense intra-specific and geographic sampling. Chloroplast haplotypes primarily reflected phylogeographic patterns originating from interspecific cytoplasmic gene flow within sect. Cerris and its sister section Ilex. We identified two widespread and ancestral haplotypes, and locally restricted derived variants. Signatures shared with Mediterranean species of sect. Ilex, but not with the East Asian Cerris oaks, suggest that the western Eurasian lineage came into contact with Ilex only after the first (early Oligocene) members of sect. Cerris in Northeast Asia had begun to radiate and move westwards. Nuclear 5S-IGS diversification patterns were more useful for establishing a molecular-taxonomic framework and to reveal hybridization and reticulation. Four main evolutionary lineages were identified. The first lineage is comprised of Q. libani, Q. trojana and Q. afares and appears to be closest to the root of sect. Cerris. These taxa are morphologically most similar to the East Asian species of Cerris, and to both Oligocene and Miocene fossils of East Asia and Miocene fossils of western Eurasia. The second lineage is mainly composed of the widespread Q. cerris and the narrow endemic species Q. castaneifolia, Q. look, and Q. euboica. The third lineage comprises three Near East species (Q. brantii, Q. ithaburensis and Q. macrolepis), well adapted to continental climates with cold winters. The forth lineage appears to be the most derived and comprises Q. suber and Q. crenata. Q. cerris and Q. trojana displayed high levels of variation; Q. macrolepis and Q. euboica, previously treated as subspecies of Q. ithaburensis and Q. trojana, likely deserve independent species status. A trend towards inter-specific crosses was detected in several taxa; however, we found no clear evidence of a hybrid origin of Q. afares and Q. crenata, as currently assumed.

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Section: Discussionmentioning

confidence: 99%

Comparative systematics and phylogeography ofQuercusSectionCerrisin western Eurasia: inferences from plastid and nuclear DNA variation

Simeone

Cardoni

Piredda

et al. 2018

PeerJ

View full text Add to dashboard Cite

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“…The detected genetic diversity at the plastid and, especially, the nuclear markers (Table 5) clearly indicates the genetic isolation from the rest of the Cerris oaks and progressive inter-specific differentiation. Geographic, morphological and ecological differences are also evident in Q. ithaburensis and Q. macrolepis (Dufour-Dror & Ertas, 2002. On these grounds and considering the high inter-taxon 5S-IGS divergence supported by the different haplotypes (Tables 2-4), we suggest these two forms be treated as separate species (cf.…”

Section: Molecular Recognition Of Species and Species Diversity In Qumentioning

confidence: 72%

Peer Review #2 of "Comparative systematics and phylogeography of Quercus Section Cerris in western Eurasia: inferences from plastid and nuclear DNA variation (v0.1)"

2018

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Oaks (Quercus) comprise more than 400 species worldwide and centres of diversity for most sections lie in the Americas and East/Southeast Asia. The only exception is the Eurasian sect. Cerris that comprises about 15 species, most of which are confined to western Eurasia. This section has not been comprehensively studied using molecular tools. Here, we assess species diversity and provide a first comprehensive taxonomic and phylogeographic scheme of western Eurasian members of sect. Cerris using plastid (trnH-psbA) and nuclear (5S-IGS) DNA variation with a dense intra-specific and geographic sampling. Chloroplast haplotypes primarily reflected phylogeographic patterns originating from interspecific cytoplasmic gene flow within sect. Cerris and its sister section Ilex. We identified two widespread and ancestral haplotypes, and locally restricted derived variants. Signatures shared with Mediterranean species of sect. Ilex, but not with the East Asian Cerris oaks, suggest that the western Eurasian lineage came into contact with Ilex only after the first (early Oligocene) members of sect. Cerris in Northeast Asia had begun to radiate and move westwards. Nuclear 5S-IGS diversification patterns were more useful for establishing a molecular-taxonomic framework and to reveal hybridization and reticulation. Four main evolutionary lineages were identified. The first lineage comprises Q. libani, Q. trojana and Q. afares and appears to be closest to the root of sect. Cerris. These taxa are morphologically most similar to the East Asian species of Cerris, and to both Oligocene and Miocene fossils of East Asia and Miocene fossils of western Eurasia. The second lineage is mainly composed of the widespread Q. cerris and the narrow endemic species Q. castaneifolia, Q. look, and Q. euboica. The third lineage comprises three Near East species (Q. brantii, Q. ithaburensis and Q. macrolepis), well adapted to continental climates with

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“…In order to compare the means of our samples of Q. ithaburensis with those represented by Dufour-Dror and Ertaş (2002), one sample T-test was applied with 5% error.…”

Section: Discussionmentioning

confidence: 99%

Oak morphological traits: Between taxa and environmental variability

Stephan

Teeny

Vessella

et al. 2018

Flora

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The seven oak species present in Lebanon show taxonomic ambiguity partly due to their great morphological variability among and within species. Very few investigations were conducted on oaks in Lebanon despite the presence of endemic species, and none tried to discriminate these according to their morphology, nor to determine subspecies or identify eventual hybrids. In this study 1328 leaves and 550 fruits were collected covering the whole range of oak species over the Lebanese territory; 24 leaf and 6 fruit traits were recorded and analyzed in order to differentiate among species, to define missing gaps for certain subspecies and to discriminate eventual hybrids and their possible parents.Environmental conditions were attributed in each sampling location to study the effect of selected environmental factors on leaf traits. PCA results showed that several leaf and fruit traits differ significantly among species, and that species leaf characteristics override the environmental influence.The interval between central nerve and apical leaf nerve, interval between apical and basal lobes, scale length and cupule diameter are the main contributors to differentiation among taxa. Oak species were grouped according to the 3 subgenus sections and species and subspecies were discriminated mainly according to fruit traits variance. Three potential hybrids were identified, with intermediate morphology or closer to one of their parents. Variation of morphological traits were discerned according to biogeographical gradients, and varied from one species to another.

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Cupule and acorn basic morphological differences between Quercus ithaburensis Decne. subsp. ithaburensis and Quercus ithaburensis subsp. macrolepis (Kotschy) Hedge & Yalt.

Cited by 10 publications

References 0 publications

Comparative systematics and phylogeography ofQuercusSectionCerrisin western Eurasia: inferences from plastid and nuclear DNA variation

Comparative systematics and phylogeography ofQuercusSectionCerrisin western Eurasia: inferences from plastid and nuclear DNA variation

Peer Review #2 of "Comparative systematics and phylogeography of Quercus Section Cerris in western Eurasia: inferences from plastid and nuclear DNA variation (v0.1)"

Oak morphological traits: Between taxa and environmental variability

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