MATING TYPE MUTATIONS IN VARIETY 1 OF PARAMECIUM AURELIA, AND THEIR BEARING UPON THE PROBLEM OF MATING TYPE DETERMINATION

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Determination and inheritance of mating type in Paramecium aurelia, syngen 5.

ATING type inheritance in Paramecium aurelia is an important example of permanent nuclear differentiation. The relevance of nuclear differentiation to the general problem of gene action and development has often been noted (e.g., see SONNEBORN 1960). Briefly, the study of mating type determination in P. aurelia (and other ciliates) has provided models of the limitation of genic potentiality and...

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Determination and inheritance of mating type in Paramecium caudatum.

M A T I N G type determination and inheritance in Paramecium caudatum has been reported only for syngen 12 (HIWATASHI 1958). Inheritance was usually synclonal, i.e. the two clones derived from the two members of a conjugating pair are identical in mating type expression, indicating direct genic control of mating type. However the breeding analysis was incomplete and some of the observations, as...

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Genetic Analysis of Mating Type Differentiation in PARAMECIUM TETRAURELIA. II. Role of the Micronuclei in Mating-Type Determination.

The two complementary mating types, O and E, of Paramecium tetraurelia are normally inherited cytoplasmically. This property has generally been interpreted to indicate the presence of cytoplasmic factors that determine macronuclear differentiation towards O or E. In these macronuclear-cytoplasmic interactions, the micronuclei were held to be unbiased and the determination to be established in t...

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Mutational Analysis of Mating Type Inheritance in Syngen 4 of PARAMECIUM AURELIA.

Six genic mutations restricting clones to mating type VII (O) were isolated in syngen 4, Paramecium aurelia. The only three extensively tested were neither allelic nor closely linked. A second type of mutation, allelic to one of the O restricted mutants, was also found. Clones homozygous for this mutant gene were selfers, producing both O and E (VIII) mating types, but only when they were proge...

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ژورنال

عنوان ژورنال: Genetics

سال: 1955

ISSN: 1943-2631

DOI: 10.1093/genetics/40.3.321