Data/hora: 20/06/2024 09:40:56

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 20/01/2006
Data da última atualização: | 29/05/2018
Autoria: | SOUZA-PACCOLA, E. A.; FAVARO, L. C.; CASELA, C. R.; PACCOLA-MEIRELLES, L. D.
Afiliação: | Embrapa Milho e Sorgo.
Título: | Genetic recombination in colletotrichum sublineolum.
Ano de publicação: | 2003
Fonte/Imprenta: | Journal of Phytopathology, Berlin, v. 151, n. 6, p. 329-334, 2003.
Idioma: | Inglês
Conteúdo: | Genetic recombination without typical parasexuality (parameiosis) was shown in the fungus Colletotrichum sublineolum, causal agent of anthracnose on sorghum. The cross among auxotrophic mutants and mutants resistant to benomyl and cycloheximide confirmed the occurrence of heterokaryosis in this species. Aneuploid and haploid recombinants were obtained from heterokaryons. Some segregants released sectors continually after several replication cycles, and were considered aneuploids in the process of haploidization. Heterokaryons derived from crosses among mutants that presented low pathogenicity produced more virulent recombinants. Parasexuality with parameiosis may represent a natural mechanism for genetic variability amplification explaining the rapid appearance of new C. sublineolum physiological races.
Palavras-Chave: | Heterokaryosis; Parameiosis; Vegetative compatibility.
Thesaurus Nal: | mutants; parasexual cycle.
Categoria do assunto: | --
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (18254-1) - UPC - AP - DD -  -  -  - DIS