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The Genetic Control of Two Lethal Traits in Variety 1, Tetrahymena pyriformis *
Author(s) -
ORIAS EDUARDO
Publication year - 1960
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.1550-7408.1960.tb00710.x
Subject(s) - tetrahymena pyriformis , biology , loss of heterozygosity , inbreeding , genetics , allele , outbreeding depression , tetrahymena , strain (injury) , population , gene , anatomy , demography , sociology
SYNOPSIS. A breeding analysis of a wild strain (Indian Lake 12) of variety 1, Tetrahymena pyriformis , discloses recessive lethal alleles at two independently assorting loci. Conclusions concerning the cytogenetic behavior of this species have been verified through the scoring of a large number of offspring segregating the lethals. In particular, cytogamy does not occur in these strains with a frequency higher than 2%. if indeed it occurs at all. The finding of lethal heterozygosity in a wild strain suggests that close inbreeding usually does not take place in nature and supports the conclusion that variety 1 of T. pyriformis is an outbreeding species.