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

0126903 - BFU-R 20023203 RIV GB eng J - Článek v odborném periodiku
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
Grant CEP: GA ČR GA204/98/0191; GA ČR GA204/01/0313; GA ČR GA204/99/D001; GA ČR GA521/01/0037; GA MŠMT LB98210
Výzkumný záměr: CEZ:AV0Z5004920
Klíčová slova: allopolyploids * gene conversion * 5S rRNA
Kód oboru RIV: BO - Biofyzika
Impakt faktor: 1.687, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0025130