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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
09/12/2010 |
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Data da última atualização: |
26/08/2013 |
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Autoria: |
LONSDALE, D. M.; BREARS, T.; HODGE, T. P.; MELVILLE, S. E.; ROTTMANN, W. H. |
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Título: |
The plant mitochondrial genome: homologous recombination as a mechanism for generating heterogeneity. |
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Ano de publicação: |
1988 |
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Fonte/Imprenta: |
Philosophical Transactions of the Royal Society B: Biological Sciences, v. 319, n. 1193, p. 149-163, 1988. |
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Idioma: |
Inglês |
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Conteúdo: |
The mitochondrial genomes of higher plants are among the largest and most complex organelle genomes described. They are generally multicircular or partly linear; in some species, extrachromosomal plasmids are present. It is proposed that inter- and intramolecular homologous recombination can account for the diversity of the observed genome organizations. The ability of mitochondria to fuse establishes a panmictic mitochondrial DNA population which is in recombinational equilibrium. It is suggested that this suppresses the base mutation rate, and unequal partitioning of the cytoplasm during cell division can lead to the rapid evolution of mitochondrial genome structure. This contrasts with the observed rates of base-sequence and genome evolution in chloroplasts. This difference can be accounted for solely by the inability of chloroplasts to fuse, thereby preventing chloroplast genome panmixis. |
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Palavras-Chave: |
Genoma mitocondrial. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 01494naa a2200181 a 4500
001 1869225
005 2013-08-26
008 1988 bl --- 0-- u #d
100 1 $aLONSDALE, D. M.
245 $aThe plant mitochondrial genome$bhomologous recombination as a mechanism for generating heterogeneity.
260 $c1988
520 $aThe mitochondrial genomes of higher plants are among the largest and most complex organelle genomes described. They are generally multicircular or partly linear; in some species, extrachromosomal plasmids are present. It is proposed that inter- and intramolecular homologous recombination can account for the diversity of the observed genome organizations. The ability of mitochondria to fuse establishes a panmictic mitochondrial DNA population which is in recombinational equilibrium. It is suggested that this suppresses the base mutation rate, and unequal partitioning of the cytoplasm during cell division can lead to the rapid evolution of mitochondrial genome structure. This contrasts with the observed rates of base-sequence and genome evolution in chloroplasts. This difference can be accounted for solely by the inability of chloroplasts to fuse, thereby preventing chloroplast genome panmixis.
653 $aGenoma mitocondrial
700 1 $aBREARS, T.
700 1 $aHODGE, T. P.
700 1 $aMELVILLE, S. E.
700 1 $aROTTMANN, W. H.
773 $tPhilosophical Transactions of the Royal Society B: Biological Sciences$gv. 319, n. 1193, p. 149-163, 1988.
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Registro original: |
Embrapa Trigo (CNPT) |
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