Journal
ANNALS OF BOTANY
Volume 95, Issue 1, Pages 201-206Publisher
OXFORD UNIV PRESS
DOI: 10.1093/aob/mci013
Keywords
Linum usitatissimum; flax; insertion sequence; rDNA; nuclear DNA content; rapid genomic variation
Categories
Ask authors/readers for more resources
Background and aims The nuclear DNA of certain varieties of flax (Linum usitissimum) can vary within a single generation when the plants are grown under specific environmental conditions. This review details the genomic variations that have been identified and associated with this environmental response. Conclusions The variation occurs across the whole spectrum of sequence repetition and has been shown to occur in the highly repeated, middle repetitive and low copy number sequences. Although the variation has been shown to be spread throughout the genome it does not occur at random, as similar molecular events haw been shown to occur repeatedly. The changes in two labile regions in the nucleus. the ribosomal RNA genes and a site-Specific insertion event, have been shown to occur within the period of vegetative growth and over a relatively short period of that growth. The gradual changes in total nuclear DNA that has been described would then need to have arisen through an accumulation of chances accumulation of changes occuring over the whole, or most of the, period of growth prior to flowering. The polymorphism that result from these rapidly occurring genomic events have also been observed in many other flax and linseed varieties as well as in the wild progenitors of flax. (C) 2005 Annals of Botany Company.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available