Academic Journal
Meiotic studies in ten species of Hybanthus Jacq. (Violaceae) from South America
| العنوان: | Meiotic studies in ten species of Hybanthus Jacq. (Violaceae) from South America |
|---|---|
| المؤلفون: | Seo, M.N. |
| المصدر: | Cytologia 2009;74(2):141-146 |
| سنة النشر: | 2009 |
| المجموعة: | Repositorio Digital Institucional - Universidad de Buenos Aires (RDI UBA) |
| مصطلحات موضوعية: | Argentina, Basic chromosome number, Hybanthus subgenus ionidium, Meiotic behaviour, Polyploidy, South America, Hybanthus, Hybanthus atropurpureus, Ionidium, Leucopogon, Violaceae |
| الوصف: | Chromosome numbers and meiotic behaviour of 10 native species of Hybanthus in South America were analyzed. 3 different chromosome numbers were found: 2n=16 for Hybanthus atropurpureus (A. St.-Hil.) Taub., H. bigibbosus (A. St.-Hil.) Hassl. and H. paraguariensis (Chodat) Schulze-Menz, 2n=32 for H. bicolor (A. St.-Hil.) Baill., H. calceolaria (L.) Oken, H. communis (A. St.-Hil.) Taub., H. hasslerianus (Chodat) Hassl., H. leucopogon Sparre and H. nanus (A. St.-Hil.) Paula-Souza, and 2n=48 for H. longistylus Schulze-Menz. This is one of the first reports for 8 analyzed species. Nowadays, the basic chromosome numbers in the South American Hybanthus species are under discussion. The presence of 1 tetravalent in H. atropurpureus, H. bigibbosus and H. paraguariensis (2n=16) would suggest the duplication of chromosome sets, and therefore would indicate that the basic chromosome number is x=4, at least, for this group of South American Hybanthus species. The studied species would be tetraploids (2n=4x=16), octoploids (2n=8x=32) and dodecaploids in H. longistylus (2n=12r=48). In light of these findings, such polyploidy would likely have played an important role during the speciation of this heterogenerous generic assembly. © 2009 The Japan Mendel Society. ; Fil:Seo, M.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| Relation: | http://hdl.handle.net/20.500.12110/paper_00114545_v74_n2_p141_Seo; http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00114545_v74_n2_p141_Seo_oai |
| الاتاحة: | https://hdl.handle.net/20.500.12110/paper_00114545_v74_n2_p141_Seo http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00114545_v74_n2_p141_Seo_oai |
| Rights: | info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by/2.5/ar |
| رقم الانضمام: | edsbas.E00BCE6A |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |