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Rapid evolution of parental rDNA in a synthetic tobacco allotetraploid line
- 1.0127000 - BFU-R 20033083 RIV US eng J - Journal Article
Skalická, Kamila - Lim, K. Y. - Matyášek, Roman - Koukalová, Blažena - Leitch, A. R. - Kovařík, Aleš
Rapid evolution of parental rDNA in a synthetic tobacco allotetraploid line.
American Journal of Botany. Roč. 90, č. 7 (2003), s. 988-996. ISSN 0002-9122. E-ISSN 1537-2197
R&D Projects: GA ČR GA204/01/0313; GA ČR GA521/01/0037
Institutional research plan: CEZ:AV0Z5004920
Keywords : evolution * gene conversion * Nicotiana
Subject RIV: BO - Biophysics
Impact factor: 2.373, year: 2003
In this paper we have shown amplification of rDNA variants derived from N. tomentosiformis parent in the synthetic tabacco Th37, 4n (N. sylvestris x N. tomentosiformis) line. Amplification was correlated with occurance of a novel rDNA locus on N. tomentosiformis-derived chromosome T4. Combined with an analysis of tobacco cultivars, the data indicate that an initial burst rDNA evolution associated with allopolyploidy was followed by a slower process that led towards reduced complexity and a decreased number of rDNA variants.
Permanent Link: http://hdl.handle.net/11104/0025225
Number of the records: 1