Mutations That Alter the Transmission of Chloroplast Genes in Chlamydomonas
AUTOR(ES)
Sager, Ruth
RESUMO
Two mutations are described that alter the pattern of inheritance of chloroplast genes in Chlamydomonas. The mutant gene mat-1 linked to the mating type allele mt- greatly increases the frequency of exceptional zygotes, i.e., zygotes that transmit chloroplast genes from the mt- (male) parent. In some crosses, 80-90% of the zygotes are biparental, transmitting chloroplast genes from both parents. The mat-2 mutation, linked to mt+, acts to decrease the frequency of exceptional zygotes below the spontaneous level. The mutant effects are discussed in terms of a DNA modification-restriction system, postulated to regulate the transmission of chloroplast DNA in zygotes.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=433963Documentos Relacionados
- Mating Type Linked Mutations Which Disrupt the Uniparental Transmission of Chloroplast Genes in Chlamydomonas
- Nonsense mutations in the Chlamydomonas chloroplast gene that codes for the large subunit of ribulosebisphosphate carboxylase/oxygenase
- Transmission of mitochondrial and chloroplast genomes in crosses of Chlamydomonas.
- Transmission of chloroplast genes in triploid and tetraploid zygospores of Chlamydomonas reinhardtii: Roles of mating-type gene dosage and gametic chloroplast DNA content
- Trans-acting regulatory mutations that alter transcription of Saccharomyces cerevisiae histone genes.