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The Journal of Heredity 1981:72(1):39-44
© 1981 The American Genetic Association 72:39-44

research-article

Synthesis and properties of a double translocation heterozygote involving a stable ring-of-six interchange in the German cockroach

Mary H. Ross, and Donald G. Cochran

Virginia Polytechnic Institute and State University Blacksburg, Virginia 24061

Abstract

The synthesis and properties of a new double translocation heterozygote in B. germanica, combining T(8;9) with the progressive interchange T(4;5;10), are described. Competitiveness and sterility data indicate that males are promising candidates for a "field" experiment in genetic control of a cockroach. Sterility from genetic load and embryonic trapping is complete. Disjunction properties of the parental interchanges are similar to those found in cells of the double males, but chiasma frequency of the interchanged chromosomes is increased. Evidence of a possible relationship between chiasma formation and disjunction type is discussed.


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