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231223s2005 xx ||||| 00| ||eng c |
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|a pubmed24n1221.xml
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|a (NLM)15760371
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Skalická, K
|e verfasserin
|4 aut
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|a Preferential elimination of repeated DNA sequences from the paternal, Nicotiana tomentosiformis genome donor of a synthetic, allotetraploid tobacco
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|c 2005
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| 336 |
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|a Text
|b txt
|2 rdacontent
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| 337 |
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 22.06.2005
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|a Date Revised 13.12.2023
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|a published: Print
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|a Citation Status MEDLINE
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|a Copyright New Phytologist (2005).
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|a Nicotiana tabacum (tobacco, 2n = 4x = 48) is a natural allotetraploid combining two ancestral genomes closely related to modern Nicotiana sylvestris and Nicotiana tomentosiformis. Here we examine the immediate consequences of allopolyploidy on genome evolution using 20 S4-generation plants derived from a single synthetic, S0 plant made by Burk in 1973 (Th37). Using molecular and cytogenetic methods we analysed 14 middle and highly repetitive sequences that together total approximately 4% of the genome. Two repeats related to endogenous geminiviruses (GRD5) and pararetroviruses (NtoEPRV), and two classes of satellite repeats (NTRS, A1/A2) were partially or completely eliminated at variable frequency (25-60%). These sequences are all from the N. tomentosiformis parent. Genomic in situ hybridization revealed additivity in chromosome numbers in two plants (2n = 48), while a third was aneuploid for an N. tomentosiformis-origin chromosome (2n = 49). Two plants had homozygous translocations between chromosomes of the S- and T-genomes. * The data demonstrate that genetic changes in synthetic tobacco were fast, targeted to the paternal N. tomentosiformis-donated genome, and some of the changes showed concordance with changes that presumably occurred during evolution of natural tobacco
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a DNA, Plant
|2 NLM
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|a DNA, Ribosomal
|2 NLM
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|a DNA, Viral
|2 NLM
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| 700 |
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|a Lim, K Y
|e verfasserin
|4 aut
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|a Matyasek, R
|e verfasserin
|4 aut
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|a Matzke, M
|e verfasserin
|4 aut
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|a Leitch, A R
|e verfasserin
|4 aut
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|a Kovarik, A
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 166(2005), 1 vom: 14. Apr., Seite 291-303
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:166
|g year:2005
|g number:1
|g day:14
|g month:04
|g pages:291-303
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|a AR
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|d 166
|j 2005
|e 1
|b 14
|c 04
|h 291-303
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