Skip Navigation



Journal of Heredity Advance Access published online on April 13, 2006
Journal of Heredity, doi:10.1093/jhered/esj029
This Article
Right arrow FREE Full Text (PDF) Freely available
Right arrow All Versions of this Article:
97/3/296    most recent
esj029v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Nyberg Berglund, A.-B.
Right arrow Articles by Westerbergh, A.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Nyberg Berglund, A.-B.
Right arrow Articles by Westerbergh, A.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The American Genetic Association. 2006. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org.
Received July 6, 2005
Accepted January 24, 2006

Brief Communication

Electrophoretic Evidence for Disomic Inheritance and Allopolyploid Origin of the Octoploid Cerastium alpinum (Caryophyllaceae)

Anna-Britt Nyberg Berglund 1 *, Anssi Saura 2, and Anna Westerbergh 3

1 From the Department of Natural Sciences, Mid Sweden University, S-851 70 Sundsvall, Sweden
2 From the Department of Molecular Biology, Umeå University, S-901 87 Umeå, Sweden
3 From the Department of Plant Biology and Forest Genetics, Swedish University of Agricultural Sciences, S-750 07 Uppsala, Sweden

* To whom correspondence should be addressed.
Anna-Britt Nyberg Berglund, E-mail: Anna-Britt.Nyberg-Berglund{at}miun.se


  Abstract

The mode of inheritance of six enzyme markers in the octoploid alpine plant Cerastium alpinum was analyzed. Offspring from crosses between heterozygotes showed fixed heterozygosity at malate dehydrogenase-2, phosphoglucoisomerase-2, triosephosphate isomerase-2, and triosephosphate isomerase-3. Phosphoglucomutase-1 also showed fixed heterozygosity except in offspring from one cross. Fixed heterozygosity in five enzyme systems suggests that C. alpinum has originated through at least some allopolyploidization. Offspring from plants heterozygous for two alleles at the menadione reductase-1 (Mr-1) locus did not deviate significantly from a 1:2:1 ratio. The large proportion of homozygotes suggests disomic inheritance because any kind of polysomic inheritance would result in a substantially increased proportion of heterozygotes relative to disomic inheritance. Assuming a diploid model for Mr-1, this locus was used to analyze the population genetic structure within C. alpinum populations. Inbreeding was found in many alpine populations. This may help explain the large genetic distances found among alpine populations in a previous study. The analysis is only based on one segregating locus, and the results should therefore be treated with caution. However, by establishing the mode of inheritance through crosses, we have been able to use a codominant marker in population genetic analysis of an octoploid plant.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.