Proof for Multiple Allelism of Sex-Differentiating Factors in Habrobracon

ABSTRACT The distribution of thyroxine binding globulin activity (TBG-activity) as determined by the measurement of the resin uptake of 131I-triiodothyronine (131I-T3) has been studied in 96 Sardinian families including 339 normal males. 192 normal females and 59 Klinefelter patients. A sex difference was confirmed. No difference was however found between the levels exhibited by the Klinefelter patients and normal males. A quantitative heterogeneity in the resin uptake, which is largely under genetic control, has been found by performing exhaustive studies on the correlation of the expression of the trait in the relatives of different degree of kinship. Estimates of heritability have then been obtained which, while confirming the main genetic nature of the reported variation, do not allow us to decide in favour of an autosomal or X-linked model of inheritance. Arguments are discussed however which suggest that the interpretation of a quantitative heterogeneity in TBG-activity may depend on the existence of multiple allelism at one or more autosomal as well as at X-linked loci. The variability of PBI and resin uptake values can be partially explained by genetic factors.

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MULTIPLE ALLELISM IN INDUCED CHLOROPHYLL MUTANTS

Hereditas ◽

10.1111/j.1601-5223.1960.tb03110.x ◽

2010 ◽

Vol 46 (3-4) ◽

pp. 700-708 ◽

Cited By ~ 27

Author(s):

DITER WETTSTEIN

Keyword(s):

Multiple Allelism ◽

Chlorophyll Mutants

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Multiple allelism in theVrn-B1locus of common wheat

Cereal Research Communications ◽

10.1556/crc.39.2011.1.2 ◽

2011 ◽

Vol 39 (1) ◽

pp. 12-21 ◽

Cited By ~ 13

Author(s):

T. Efremova ◽

V. Arbuzova ◽

I. Leonova ◽

K. Makhmudova

Keyword(s):

Common Wheat ◽

Multiple Allelism

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MULTIPLE ALLELISM AT THE MATB LOCUS IN PHYSARUM POLYCEPHALUM

Canadian Journal of Genetics and Cytology ◽

10.1139/g81-002 ◽

1981 ◽

Vol 23 (1) ◽

pp. 9-16 ◽

Cited By ~ 26

Author(s):

Josée Kirouac-Brunet ◽

Sylvie Masson ◽

Dominick Pallotta

Keyword(s):

High Frequency ◽

Physarum Polycephalum ◽

Multiple Allelism ◽

Locus System

Each of the natural plasmodial isolates of Physarum polycephalum studied contains two different alleles for the matB and the matA loci. This result is further evidence for the presence of a two-locus system for limiting inbreeding in nature. Only amoebae carrying different matB alleles will fuse efficiently and only those diploid amoebae heterozygous for the matA locus will differentiate with a high frequency. Both the matA and matB loci are multiallelic. In this work ten new mat B alleles were found, bringing to 13 the number of known alleles; there are a minimum of 13 alleles at the matA locus (Collins and Tang, 1977). The presence of a large number of alleles at each of these loci increases the probability that in nature amoebae from different plasmodia are sexually compatible.

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