Dépouillements

Principles governing F1 hybridization in the genera Aeonium and Greenovia in La Gomera, Canary Islands / Octavio Arango in Willdenowia, vol. 53, n°3 (Année 2023)

Public [article]  inWilldenowia > vol. 53, n°3 (Année 2023) . - pp. 257-268 Titre : Principles governing F1 hybridization in the genera Aeonium and Greenovia in La Gomera, Canary Islands Auteurs : Octavio Arango, Auteur Année de publication : 2023 Article en page(s) : pp. 257-268 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Aeonium [ZG] ÃŽles Canaries Mots-clés : hybridation  greenovia Résumé : "A phytochorological and ecobiological study of the nine species, two subspecies and two varieties of the genera Aeonium and Greenovia in La Gomera is carried out, with special attention to F1 hybridization in nature. To the ten hybrids already described on the island, seven new hybrids were discovered, which are the subject of a separate publication. In all the known hybrids I determined whether the parents were sympatric or allopatric. The geographical coincidence of the parents was a sine qua non requirement for hybridization to occur in all the hybrids known so far, since pollen transfer by biotic and abiotic agents does not function between disjunct areas. The two prezygotic reproductive barriers that currently prevent interspecific hybridization in Aeonium or intergeneric hybridization between Aeonium and Greenovia are the geographic separation of populations and the different flowering times. The ability to survive and reproduce successfully of F1 hybrids in Aeonium and Greenovia is usually lower than that of the parent species and they generally disappear from the environment in the first filial generation without leaving offspring. The fundamental principles that govern F1 hybridization in La Gomera are extracted, and after verifying that they were also fulfilled in the other mountainous islands, they were synthesized in eight principles, which provide an updated vision of hybridization in the genus Aeonium." (source : auteur) Type de publication : périodique Référence biblio : Arango O., 2023 - Principles governing F1 hybridization in the genera Aeonium and Greenovia in La Gomera, Canary Islands. Willdenowia, 53 (3) : 257-268. ID PMB : 71862 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71862 [article]

Exemplaires(1)

Cote	Localisation	Disponibilité
P0170	Brest	Exclu du prêt

An Unexpected Occurrence of Alyssum rossetii (Brassicaceae) in the Pyrenees, a New Species for the Spanish flora / Stanislav Spaniel in Willdenowia, vol. 53, n°3 (Année 2023)

Public [article]  inWilldenowia > vol. 53, n°3 (Année 2023) . - pp. 297-308 Titre : An Unexpected Occurrence of Alyssum rossetii (Brassicaceae) in the Pyrenees, a New Species for the Spanish flora Auteurs : Stanislav Spaniel, Auteur ; Lenka Martonfiova, Auteur ; Judita Zozomova-Lihova, Auteur Année de publication : 2023 Article en page(s) : pp. 297-308 Langues : Allemand (ger) Catégories : [ZG] Espagne [Espèces (in biblio)] Alyssum Mots-clés : nouvelle espèce  morphologie  Alyssum rossetii Résumé : "Alyssum rossetii is recorded for the first time in Spain from a single locality in the Pyrenees. After the type locality in the Valpelline valley (Pennine Alps, Italy), it is only the second known locality of this species. Morphology, diploid chromosome number (2n = 16), relative genome size, and ITS sequences confirm that the Pyrenean plants are conspecific with the Alpine ones and should be classified as A. rossetii. Phylogenetic analyses placed A. rossetii within the clade of A. sect. Gamosepalum comprising species from Turkey and demonstrated that A. rossetii is only distantly related to other Alyssum species occurring in the Pyrenees and adjacent regions: A. alyssoides, A. cacuminum, A. collinum, A. fastigiatum, A. granatense, A. montanum, and A. simplex. An identification key to all Alyssum species known from the Pyrenees is presented." (source : auteurs) Type de publication : périodique Référence biblio : Spaniel S., Martonfiova L., Zozomova-Lihova J., 2023 - An Unexpected Occurrence of Alyssum rossetii (Brassicaceae) in the Pyrenees, a New Species for the Spanish flora. Willdenowia, 53 (3) : 297-308. ID PMB : 71863 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71863 [article]

Exemplaires(1)

Cote	Localisation	Disponibilité
P0170	Brest	Exclu du prêt