Icelandic Birch Polyploids—The Case of a Perfect Fit in Genome Size
Joint Authors
Greilhuber, Johann
Temsch, Eva M.
Anamthawat-Jónsson, K.
Thórsson, Æ. Th.
Source
Issue
Vol. 2010, Issue 2010 (31 Dec. 2010), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2010-06-29
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Two birch species coexist in Iceland, dwarf birch Betula nana and tree birch B.
pubescens.
Both species are variable morphologically, which has been shown to be due to introgressive hybridization via interspecific hybrids.
The aim of this study was to examine if the introgression could be related to genome size.
We characterized 42 plants from Bifröst woodland morphologically and cytogenetically.
The population consisted of diploid B.
nana (38%), tetraploid B.
pubescens (55%), and triploid hybrids (7%).
Genome size was measured from 12 plants, using Feulgen DNA image densitometry (FDM) on spring leaf buds and flow cytometry (FCM) with dormant winter twigs.
The use of winter twigs for FCM is novel.
The average 1C-values for diploid, triploid, and tetraploid plants were 448, 666, and 882 Mbp, respectively.
Monoploid genome sizes were found to be statistically constant among ploidy levels.
This stability is in contrast to the different taxonomic positions of the di- and tetraploids and also contrasts with the frequent occurrence of genome downsizing in polyploids.
American Psychological Association (APA)
Anamthawat-Jónsson, K.& Thórsson, Æ. Th.& Temsch, Eva M.& Greilhuber, Johann. 2010. Icelandic Birch Polyploids—The Case of a Perfect Fit in Genome Size. Journal of Botany،Vol. 2010, no. 2010, pp.1-9.
https://search.emarefa.net/detail/BIM-464633
Modern Language Association (MLA)
Anamthawat-Jónsson, K.…[et al.]. Icelandic Birch Polyploids—The Case of a Perfect Fit in Genome Size. Journal of Botany No. 2010 (2010), pp.1-9.
https://search.emarefa.net/detail/BIM-464633
American Medical Association (AMA)
Anamthawat-Jónsson, K.& Thórsson, Æ. Th.& Temsch, Eva M.& Greilhuber, Johann. Icelandic Birch Polyploids—The Case of a Perfect Fit in Genome Size. Journal of Botany. 2010. Vol. 2010, no. 2010, pp.1-9.
https://search.emarefa.net/detail/BIM-464633
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-464633