Karyological studies in Asteraceae. VIII

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Meiotic and/or mitotic chromosome numbers were determined and observations on meiotic behavior were made in 14 accessions belonging to 14 especies concerning 8 genera distributed in 4 tribes of the Asteraceae. Five species are investigated chromosomally for the first time. These are as follows, trib...

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Detalles Bibliográficos
Autor principal: Wulff, A.F.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 1997
Materias:
Asteraceae
Baccharis
Brachyclados
Chromosome numbers
Conyza
Hieracium
Hypochoeris
Karyotype
Nassauvia
Senecio
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00116793_v35_n_p37_Wulff
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paperaa:paper_00116793_v35_n_p37_Wulff
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spelling paperaa:paper_00116793_v35_n_p37_Wulff2023-06-12T16:41:27Z Karyological studies in Asteraceae. VIII Darwiniana 1997;35:37-43 Wulff, A.F. Asteraceae Baccharis Brachyclados Chromosome numbers Conyza Hieracium Hypochoeris Karyotype Nassauvia Senecio Meiotic and/or mitotic chromosome numbers were determined and observations on meiotic behavior were made in 14 accessions belonging to 14 especies concerning 8 genera distributed in 4 tribes of the Asteraceae. Five species are investigated chromosomally for the first time. These are as follows, tribe Mutisieae: Brachyclados cespitosus(Phil.) Speg. (n = 23), Nassauvia pygmaea (Cass.) Hooker (n = 22); tribe Cichorieae: Hypochoeris acaulis (Remy) Britton (n = 4, 2n = 8), Hieracium glaucifolium Poepp. ex Froelich in DC. (2n = 18) and Hieracium aff. palezieuxii Zahn (2n = 18). Different chromosome number to those previously reported in the literature were found for Hypochoeris chondrilloides (A. Gray) Cabrera (n = 8), Baccharis ulicina Hook. Arn. (2n = 18+3B), Conyza aff. bonariensis (L.) Cronquist (2n = 18). The karyotypes of Brachyclados lycioides Don, Hypochoeris acaulis (Remy) Britton, Hieracium aff. palezieuxii Zahn and Senecio chilensis Less. are described for the first time. Meanwhile, the karyotypes of Hypochoeris microcephala (Sch. Bip.) Cabrera var. albiflora (Kuntze) Cabrera, H. chillensis (Kunth) Hieron. and H. megapotamica Cabrera showed to be slightly different with those described in previous publications. The significance of some of the results in relation to taxonomical and evolutionary problems is discussed. Fil:Wulff, A.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1997 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00116793_v35_n_p37_Wulff
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic Asteraceae
Baccharis
Brachyclados
Chromosome numbers
Conyza
Hieracium
Hypochoeris
Karyotype
Nassauvia
Senecio
spellingShingle Asteraceae
Baccharis
Brachyclados
Chromosome numbers
Conyza
Hieracium
Hypochoeris
Karyotype
Nassauvia
Senecio
Wulff, A.F.
Karyological studies in Asteraceae. VIII
topic_facet Asteraceae
Baccharis
Brachyclados
Chromosome numbers
Conyza
Hieracium
Hypochoeris
Karyotype
Nassauvia
Senecio
description Meiotic and/or mitotic chromosome numbers were determined and observations on meiotic behavior were made in 14 accessions belonging to 14 especies concerning 8 genera distributed in 4 tribes of the Asteraceae. Five species are investigated chromosomally for the first time. These are as follows, tribe Mutisieae: Brachyclados cespitosus(Phil.) Speg. (n = 23), Nassauvia pygmaea (Cass.) Hooker (n = 22); tribe Cichorieae: Hypochoeris acaulis (Remy) Britton (n = 4, 2n = 8), Hieracium glaucifolium Poepp. ex Froelich in DC. (2n = 18) and Hieracium aff. palezieuxii Zahn (2n = 18). Different chromosome number to those previously reported in the literature were found for Hypochoeris chondrilloides (A. Gray) Cabrera (n = 8), Baccharis ulicina Hook. Arn. (2n = 18+3B), Conyza aff. bonariensis (L.) Cronquist (2n = 18). The karyotypes of Brachyclados lycioides Don, Hypochoeris acaulis (Remy) Britton, Hieracium aff. palezieuxii Zahn and Senecio chilensis Less. are described for the first time. Meanwhile, the karyotypes of Hypochoeris microcephala (Sch. Bip.) Cabrera var. albiflora (Kuntze) Cabrera, H. chillensis (Kunth) Hieron. and H. megapotamica Cabrera showed to be slightly different with those described in previous publications. The significance of some of the results in relation to taxonomical and evolutionary problems is discussed.
format Artículo
Artículo
publishedVersion
author Wulff, A.F.
author_facet Wulff, A.F.
author_sort Wulff, A.F.
title Karyological studies in Asteraceae. VIII
title_short Karyological studies in Asteraceae. VIII
title_full Karyological studies in Asteraceae. VIII
title_fullStr Karyological studies in Asteraceae. VIII
title_full_unstemmed Karyological studies in Asteraceae. VIII
title_sort karyological studies in asteraceae. viii
publishDate 1997
url http://hdl.handle.net/20.500.12110/paper_00116793_v35_n_p37_Wulff
work_keys_str_mv AT wulffaf karyologicalstudiesinasteraceaeviii
_version_ 1769810312749383680

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