RAPD polymorphisms detected among the flax genotrophs

RAPD polymorphisms detected among the flax genotrophs The occurrence of environmentally induced heritable changes in certain flax varieties has been shown to be accompanied by changes in the genomic DNA. A large difference in nuclear DNA contents has been characterized between the extreme types, termed genotrophs. The genomic variation between a series of genotrophs has been studied by the polymerase chain reaction using random arbitrary oligonucleotide primers. A total of 320 primers were used in the reactions and 253 polymorphic bands observed. The polymorphic bands were derived from all parts of the genome, namely the highly repetitive, middle-repetitive and low-copy-number sequences. They were also shown to be distributed thoughout the genome. In one group of genotrophs, all of which were induced by temperature treatment, there was a clustering of the polymorphisms with a high degree of shared polymorphisms. These results are in agreement with earlier studies showing that a dispersed fraction of the genome is susceptible to variation when environmentally induced heritable changes occur. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Molecular Biology Springer Journals

RAPD polymorphisms detected among the flax genotrophs

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Publisher
Springer Journals
Copyright
Copyright © 1999 by Kluwer Academic Publishers
Subject
Life Sciences; Biochemistry, general; Plant Sciences; Plant Pathology
ISSN
0167-4412
eISSN
1573-5028
D.O.I.
10.1023/A:1006385606163
Publisher site
See Article on Publisher Site

Abstract

The occurrence of environmentally induced heritable changes in certain flax varieties has been shown to be accompanied by changes in the genomic DNA. A large difference in nuclear DNA contents has been characterized between the extreme types, termed genotrophs. The genomic variation between a series of genotrophs has been studied by the polymerase chain reaction using random arbitrary oligonucleotide primers. A total of 320 primers were used in the reactions and 253 polymorphic bands observed. The polymorphic bands were derived from all parts of the genome, namely the highly repetitive, middle-repetitive and low-copy-number sequences. They were also shown to be distributed thoughout the genome. In one group of genotrophs, all of which were induced by temperature treatment, there was a clustering of the polymorphisms with a high degree of shared polymorphisms. These results are in agreement with earlier studies showing that a dispersed fraction of the genome is susceptible to variation when environmentally induced heritable changes occur.

Journal

Plant Molecular BiologySpringer Journals

Published: Oct 16, 2004

References

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