Evolution and structure of 5S rDNA loci in allotetraploid Nicotiana tabacum and its putative parental species

0126903 - BFU-R 20023203 RIV GB eng J - Journal Article
Fulneček, Jaroslav - Lim, K. Y. - Leicht, A. R. - Kovařík, Aleš - Matyášek, Roman
Evolution and structure of 5S rDNA loci in allotetraploid Nicotiana tabacum and its putative parental species.
Heredity. Roč. 88, č. 1 (2002), s. 19-25. ISSN 0018-067X. E-ISSN 1365-2540
R&D Projects: GA ČR GA204/98/0191; GA ČR GA204/01/0313; GA ČR GA204/99/D001; GA ČR GA521/01/0037; GA MŠMT LB98210
Institutional research plan: CEZ:AV0Z5004920
Keywords : allopolyploids * gene conversion * 5S rRNA
Subject RIV: BO - Biophysics
Impact factor: 1.687, year: 2002

The non transcribed spacers of both 5S rDNA families from Nicotiana tabacum as well as from corresponding diploid parents were cloned. Their sequences differ mainly in the central part where N. tomentosiformis like spacer contains 141 bp long, CG rich insertion. No detectable changes occurred during evolution of individual families in tobacco allotetraploid nucleus indicating relatively recent origin of N. tabacum or low recombinant activity between both parental 5S rDNA gene families.
Permanent Link: http://hdl.handle.net/11104/0025130