The detection of nonhybrid, trisomic, and triploid offspring in sexual progeny of a mating of Phytophthora infestans.
Fungal Genet Biol
; 26(3): 198-208, 1999 Apr.
Article
em En
| MEDLINE
| ID: mdl-10361034
ABSTRACT
Eighty single-oospore offspring of Phytophthora infestans from a mating of isolates, which had previously been analyzed for segregation of avirulence/virulence, were assessed for the inheritance of 20 RFLP markers. Three offspring were triploid; they inherited three alleles at all loci where this could be detected and when heterozygous, showed unequal intensities of hybridization with most probes. Twenty-four offspring were trisomic, as each had three doses of one or a few markers, evident from their inheritance of three alleles or from unequal hybridization to one probe. Coinheritance of the extra allele(s) and mitochondrial haplotype in the majority of trisomic offspring suggested that meiosis in oogonia was more aberrant than in antheridia. Linkage analysis was performed on 50 offspring, which were assumed to be euploid; six small linkage groups were detected and several avirulence loci were found to be linked. The origins of aberrant offspring are discussed.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Phytophthora
/
Genes Fúngicos
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
Fungal Genet Biol
Assunto da revista:
GENETICA
/
MICROBIOLOGIA
Ano de publicação:
1999
Tipo de documento:
Article
País de afiliação:
Reino Unido