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'nombre de chromosome' 




Chromosome numbers and genome size data on species of the genus Petrorhagia (Caryophyllaceae) from Turkey / Kamuran Aktas in Turkish Journal of Botany, vol. 46 (Année 2022)
[article]
Titre : Chromosome numbers and genome size data on species of the genus Petrorhagia (Caryophyllaceae) from Turkey Auteurs : Kamuran Aktas, Auteur ; Jaume Pellicer, Auteur ; Teresa Garnatje, Auteur Année de publication : 2022 Article en page(s) : pp. 134-141 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Caryophyllaceae
[Espèces (in biblio)] PetrorhagiaMots-clés : nombre de chromosome flore endémique, cytométrie en flux génome Résumé : "Genome size, i.e. the total amount of DNA in an unreplicated somatic nucleus is considered an important character in the biology of organisms, and it is especially relevant for land plants given the extraordinary diversity reported. Despite the continuous growth of data and the efforts aimed at increasing our understanding of plant genome size diversity, more data are needed to have an evenly representation across lineages. With this premise in mind, in this work, we investigated genome size, complemented with chromosome data in eight species of the genus Petrorhagia (Caryophyllaceae) from Turkey. Chromosome counts made indicate that the species studied are diploid except for one species, P. saxifraga, which is probably a tetraploid, based on previously published estimations of nuclear DNA contents. The presence of both basic chromosome numbers x = 15 and x = 13 is confirmed, the latter being restricted to the species P. hispidula and P. cretica. The counts carried out for the Turkish endemic species, in P. hispidula (2n = 26), P. pamphylica (2n = 30) and P. peroninii (2n = 30) represent novel data for the genus. Nuclear DNA contents ranged from 1.24 to 2.32 pg/2C (varying 1.87-fold). Based on available data, genome expansions in the genus seem to have occurred through different evolutionary mechanisms, such as polyploidy and differential repetitive DNA activation, evidencing contrasting genomic trajectories between closely related taxa." (source : auteurs) Type de publication : périodique Référence biblio : Aktas K., Pellicer J., Garnatje T., 2022 - Chromosome numbers and genome size data on species of the genus Petrorhagia (Caryophyllaceae) from Turkey. Turkish Journal of Botany, 46 : 134-141. ID PMB : 72169 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=72169
in Turkish Journal of Botany > vol. 46 (Année 2022) . - pp. 134-141[article]Exemplaires(0)
Disponibilité aucun exemplaire Datos acerca de la hibridacion en el genero Sarcocornia (Chenopodiaceae) / Santiago Castroviejo in Anales del Jardin Botanico de Madrid, vol. 50, n°2 (Année 1992)
[article]
Titre : Datos acerca de la hibridacion en el genero Sarcocornia (Chenopodiaceae) Type de document : texte imprimé Auteurs : Santiago Castroviejo (1946-2009), Auteur ; Elena Lago, Auteur Année de publication : 1992 Article en page(s) : pp. 163-170 Langues : Espagnol (spa) Catégories : [Espèces (in biblio)] Chenopodiaceae
[Espèces (in biblio)] SarcocorniaMots-clés : hybridation nombre de chromosome Résumé : "Mitosis in 14 populations of Sarcocornia species collected in Spain, ltaly and Morocco was studied. Previous chromosome counts are confirmed and new ones presented. From the present and previous data, a hypothesis is proposed to explain the origin of the cytotypes 2n = 45, 2n = 54, and 2n = 72, postulating natural hybridization involving polyploid (amphiploid) processes by means of formation of non-reduced gametes. Additionally, the new combinationS. aplini (Lag.) Castroviejo is proposed." (source : auteurs) Type de publication : périodique Référence biblio : Castroviejo S., Lago E., 1992 - Datos acerca de la hibridacion en el genero Sarcocornia (Chenopodiaceae). Anales del Jardin Botanico de Madrid, 50 (2) : 163-170. ID PMB : 70588 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=70588
in Anales del Jardin Botanico de Madrid > vol. 50, n°2 (Année 1992) . - pp. 163-170[article]Exemplaires(1)
Cote Localisation Disponibilité P0160 Brest Exclu du prêt Karyological and molecular analysis of Leucanthemum (Compositae, Anthemideae) in Corsica / Christoph Oberprieler in Willdenowia, vol. 49, n°3 (Année 2019)
[article]
Titre : Karyological and molecular analysis of Leucanthemum (Compositae, Anthemideae) in Corsica Type de document : texte imprimé Auteurs : Christoph Oberprieler, Auteur ; Lena Schinhärl, Auteur ; Florian Wagner, Auteur ; Laetitia Hugot, Auteur ; Robert Vogt, Auteur Année de publication : 2019 Article en page(s) : pp. 411-420 Langues : Anglais (eng) Catégories : [ZG] CORSE
[Espèces (in biblio)] Leucanthemum
[Thèmes] TaxonomieMots-clés : morphologie Compositae anthemideae Amplified Fragment Length Polymorphism (AFLP) nombre de chromosome cytologie Résumé : "Karyological, flow-cytometric and molecular analyses indicate that the genus Leucanthemum Mill. (Compositae, Anthemideae) is represented in Corsica (Corse) by two species: the tetraploid L. ircutianum DC. and the hexaploid L. corsicum (Less.) DC. The indication of the occurrence of the diploid L. vulgare Lam. on the island and of a tetraploid chromosome number for L. corsicum, given in former treatments of the genus for Corsica, could not be corroborated. AFLP fingerprinting further suggests that the infraspecific taxonomy of L. corsicum with two subspecies (L. corsicum subsp. corsicum and subsp. fenzlii) and three forms (L. corsicum f. corsicum, f. pinnatifidum and f. eschenlohrianum), which is mainly based on differences in the degree of leaf dissection, is not backed by genetic discontinuities. Owing to the observed little variation in leaf dissection within populations in the wild and the constancy of these features under cultivation, we propose the rank of varieties to taxonomically acknowledge these different stages in the broad spectrum of leaf-dissection grades exhibited by L. corsicum. As a consequence, the two new combinations L. corsicum var. eschenlohrianum (Gamisans) Vogt, Hugot & Oberpr. and L. corsicum var. fenzlii (Gamisans) Vogt, Hugot & Oberpr. are proposed." (source : auteurs) Type de publication : périodique Référence biblio : Oberprieler C., Schinhärl L., Wagner F., Hugot L., Vogt R., 2019 - Karyological and molecular analysis of Leucanthemum (Compositae, Anthemideae) in Corsica. Willdenowia, 49 (3) : 411-420. ID PMB : 68884 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=68884
in Willdenowia > vol. 49, n°3 (Année 2019) . - pp. 411-420[article]Exemplaires(1)
Cote Localisation Disponibilité P0170 Brest Exclu du prêt