Isozyme analysis of different species of the genus Saccobolus (Ascomycetes, Pezizales)
In this work we accomplished the isozyme analysis of monosporic strains of ten species of the genus Saccobolus, with the aim of establishing: the precise identification of some especies among which, the continuous variation of some characters poses doubts about their delimitation, interspecific rela...
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| Autores principales: | , , , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00934666_v74_n2_p447_Ramos |
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| Sumario: | In this work we accomplished the isozyme analysis of monosporic strains of ten species of the genus Saccobolus, with the aim of establishing: the precise identification of some especies among which, the continuous variation of some characters poses doubts about their delimitation, interspecific relationships within the genus and evaluate possible intraspecific variations. No differences were observed in the state of the characters between the monosporic strains of each geographical isolate. Esterases was the only system in which differences between some geographical isolates were observed within the same species, resulting in a total of 15 band patterns. The phenogram obtained from grouping analysis (UPGMA) showed two groups of species, corresponding to the two sections of the genus. The isozyme analysis shows a very close degree of association within the members of the genus Saccobolus, this agrees with the morphological and physiological observations of the group, in which the species are regarded as a continuum. In the species studied of the genus Saccobolus the scarce intraspecific variation (due probably to the type of sexual reproduction) allows to emphasise the interspecific differences and clearly separate the different species These scarce isoenzimatic variability, could reflect a real genetic homogeneity. The results of this research support the use of isozyme patterns of enzymes tested for the delimitation of species in the genus. This analysis warrants the existence of the ten species as taxonomically independent units. |
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