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Analyse morphologique et taxonomique du complexe Quercus faginea (Fagaceae) en Algérie

Abstract : The systematics of Quercus faginea Lam. (s.l.) (Fagaceae) remains obscure, as it tends to crossbreed with other species and show signs of polymorphism. Four subspecies were identified and currently recognized in the Iberian Peninsula and Morocco. However, the literature to date does not allow the distinction between the taxa present in Algeria. To remedy the lack of required data, a morphological and taxonomic analysis of 13 tree populations has been carried out in the country. In the process, 20 leaves and 20 buds from 10 mature trees were collected at each population to produce a more detailed description of 23 particular morphological traits. MCA (multiple correspondence analysis) and AHC (ascendant hierarchical clustering) were used to analyze the data and to identify homogeneous groups. The results obtained show high intra and inter-population variability, with leaf size diminishing from east to west and from north to south of the country. Though the findings were remarkable, they alone could not be used to differentiate between populations under examination; the traits relating to blade shape and indumentum type on the leaf prove to be more useful. It is clear from this study that the Q. faginea Lam. group in Algeria is represented by two species: Quercus canariensis Willd. and Q. faginea Lam., the latter being represented by two taxa: subsp. faginea and subsp. broteroi.
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https://hal.inrae.fr/hal-03146455
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Submitted on : Friday, February 19, 2021 - 9:54:45 AM
Last modification on : Thursday, March 18, 2021 - 2:20:22 PM

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Abdeldjalil Aissi, Yassine Beghami, Olivier Lepais, Errol Véla. Analyse morphologique et taxonomique du complexe Quercus faginea (Fagaceae) en Algérie. Botany / Botanique, NRC Research Press, 2021, 99 (2), pp.99-113. ⟨10.1139/cjb-2020-0075⟩. ⟨hal-03146455⟩

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