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Life Cycle of Autogamous Strains of Euplotes minuta *
Author(s) -
LUPORINI PIERANGELO
Publication year - 1970
Publication title -
the journal of protozoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 0022-3921
DOI - 10.1111/j.1550-7408.1970.tb02379.x
Subject(s) - biology , clone (java method) , genetics , mating , mating type , zoology , gene
SYNOPSIS. The life cycles of 5 autogamous strains of Euplotes minuta are reported. Interautogamic intervals (measured as number of fissions) are quite variable among clones belonging to the same strain, while their variability is much reduced (15 fissions) among sublines of the same clone. By selecting the clone with the shortest immature period to start successive autogamous generations, it has been found that all clones undergo autogamy almost synchronously and have a very short period of immaturity at the 5th autogamous generation. Both conjugation and autogamy, however, are consistently followed by immature periods in all autogamous strains examined. Mating capacity as well as competence for autogamy are reached almost simultaneously in all clones of the strains studied with the exception of about 1/3 of the A‐31 clones in which autogamy occurs significantly earlier than conjugation. The results are discussed from the genetic point of view and in relation to the sexual mechanisms operating in nature within different populations of the species.