Mapping of the Homothallic Genes, HM Alpha and HMa, in Saccharomyces Yeasts

Overview

Journal Genetics

Publisher Oxford University Press

Specialty Genetics

Date 1976 Nov 1

PMID 1001877

Citations 24

Authors

S Harashima

Y Oshima

Affiliations

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Abstract

Two of the three homothallic genes, HM alpha and HMa, showed direct linkage to the mating-type locus at approximately 73 and 98 strans (57 and 65 centimorgans [cM], respectively, whereas, the other, HO, showed no linkage to 25 standard markers distributed over 17 chromosomes including the mating-type locus. To determine whether the HM alpha and HMa loci located on the left or right side of the mating-type locus, equations for three factor analysis of three linked genes were derived. Tetrad data were collected and were compared with expected values by chi 2 statistics. Calculations indicated that the HM alpha gene is probably located on the right arm at 95 strans (65 cM) from the centromere and the HMa locus at approximately 90 strans (64 cM) on the left arm of chromosome III.

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References

Takano I, Oshima Y . An allele specific and a complementary determinant controlling homothallism in Saccharomyces oviformis. Genetics. 1967; 57(4):875-85. PMC: 1211775. DOI: 10.1093/genetics/57.4.875. View