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https://hdl.handle.net/2440/27565
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Type: | Journal article |
Title: | Molecular evidence for transcription of genes on a B chromosome in Crepis capillaris |
Author: | Leach, C. Houben, A. Field, B. Pistrick, K. Demidov, D. Timmis, J. |
Citation: | Genetics: a periodical record of investigations bearing on heredity and variation, 2005; 171(1):269-278 |
Publisher: | Genetics |
Issue Date: | 2005 |
ISSN: | 0016-6731 0016-6731 |
Statement of Responsibility: | Carolyn R. Leach, Andreas Houben, Bruce Field, Klaus Pistrick, Dmitri Demidov and Jeremy N. Timmis |
Abstract: | Dispensable, supernumerary (B) chromosomes are found in diverse eukaryotic species. The origin and genetic consequences of B chromosomes have been the subjects of speculation for more than a century. Until now, there has been no molecular evidence that B chromosome DNA is transcribed and there is no unequivocal evidence as to their origin. B chromosomes are considered to be genetically inert although they appear to cause a variety of phenotypic effects. We report that members of one of two ribosomal RNA gene families that are confined to the B chromosomes of a plant, Crepis capillaris, are transcribed—thus providing the first molecular evidence of gene activity on B chromosomes. Sequence analysis of part of the A and B chromosome rRNA genes, together with comparisons with related species, indicates that the B chromosome rRNA genes originate from the A chromosome. |
Keywords: | Chromosomes, Plant Crepis Flowers Plant Leaves Chromosome Aberrations DNA, Ribosomal Spacer DNA, Plant DNA, Ribosomal RNA, Ribosomal RNA, Ribosomal, 5.8S In Situ Hybridization, Fluorescence Reverse Transcriptase Polymerase Chain Reaction Sequence Alignment Sequence Analysis, DNA Phylogeny Transcription, Genetic Gene Expression Regulation, Plant Base Sequence Sequence Homology, Nucleic Acid Molecular Sequence Data |
DOI: | 10.1534/genetics.105.043273 |
Published version: | http://dx.doi.org/10.1534/genetics.105.043273 |
Appears in Collections: | Aurora harvest 6 Molecular and Biomedical Science publications |
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