Genetic variation in the chloroplast genome suggests multiple domestication of cultivated Asian rice (Oryza sativa L.).
Genome
; 50(2): 180-7, 2007 Feb.
Article
em En
| MEDLINE
| ID: mdl-17546083
ABSTRACT
Two hundred and seventy-five accessions of cultivated Asian rice and 44 accessions of AA genome Oryza species were classified into 8 chloroplast (cp) genome types (A-H) based on insertion-deletion events at 3 regions (8K, 57K, and 76K) of the cp genome. The ancestral cp genome type was determined according to the frequency of occurrence in Oryza species and the likely evolution of the variable 57K region of the cp genome. When 2 nucleotide substitutions (AA or TT) were taken into account, these 8 cp types were subdivided into 11 cp types. Most indica cultivars had 1 of 3 cp genome types that were also identified in the wild relatives of rice, O. nivara and O. rufipogon, suggesting that the 3 indica cp types had evolved from distinct gene pools of the O. rufipogon - O. nivara complex. The majority of japonica cultivars had 1 of 3 different cp genome types. One of these 3 was identified in O. rufipogon, suggesting that at least 1 japonica type is derived from O. rufipogon with the same cp genome type. These results provide evidence to support a polyphyletic origin of cultivated Asian rice from at least 4 principal lineages in the O. rufipogon - O. nivara complex.
Buscar no Google
Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Assunto principal:
Oryza
/
Variação Genética
/
Cloroplastos
/
Genoma de Planta
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Genome
Assunto da revista:
GENETICA
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Japão