Publicação: Genetic recombinants in Trichoderma pseudokoningii (Rifai) without typical parasexuality
Carregando...
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Natl Research Council Canada
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
Heterokaryons were obtained by hyphal anastomosis in Trichoderma pseudokoningii using strains with morphologic and double auxotrophic genetic markers. Stable haploid and unstable hyperhaploid recombinants were detected in monosporic colonies derived from heterokaryons and selected in appropriate media or by an enrichment filtration technique. Diploids were not observed and the recombinant frequencies were higher than those found in fungi with a typical parasexual cycle. The mechanism of recombinant emergence may involve a transient diploid formation followed by chromosomal losses at the hyphal stages, resulting in haploid and hyperhaploid recombinants. The possibility of intrachromosomal rearrangement with the involvement of cytoplasmatic DNA as a heterokaryotic transformation system cannot be excluded.
Descrição
Palavras-chave
Trichoderma pseudokoningii, parasexual process, transformation, evolution
Idioma
Inglês
Como citar
Canadian Journal of Microbiology. Ottawa: Natl Research Council Canada, v. 41, n. 12, p. 1132-1134, 1995.
