Chloroplast Genome Evolution in the Genus Avena
AUTOR(ES)
Murai, Koji
RESUMO
The genus Avena contains five different chloroplast genomes, I-V. A physical map of chloroplast (ct) DNA of Avena sativa (type I chloroplast genome) was constructed using three restriction endonucleases, PstI, SalI and SmaI. This genome is ca. 135.5 kbp in size, and contains two inverted repeats of ca. 22.5 kbp each, separated by a large (ca. 79.0 kbp) and small (ca. 12.5 kbp) single copy region. The rbcL gene which codes for the large subunit of ribulose 1,5-bisphosphate carboxylase, was located in the map. Restriction fragment patterns of all five chloroplast genomes were compared, and among them five fragment size and five restriction site mutations were disclosed. Four site mutations were found in two or more chloroplast genomes, the other site and five fragment size mutations were specific to one or another of the chloroplast genomes. A dendrogram showing phylogenetic relationships among the five chloroplast genomes, based on the distribution of the common and specific mutations among them, indicates that chloroplast genome divergence characterized by three restriction site mutations occurred first between two diploid groups, each carrying A and C genome (nuclear), respectively, followed by further speciation in each group.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1203174Documentos Relacionados
- Retrotransposon BARE-1 and Its Role in Genome Evolution in the Genus Hordeum.
- Phylogeny of the genus Pistacia as determined from analysis of the chloroplast genome
- Contribution of ultra-short invasive elements to the evolution of the mitochondrial genome in the genus Podospora.
- Evolution in the genus Drosophila
- Genome Evolution at the Genus Level: Comparison of Three Complete Genomes of Hyperthermophilic Archaea