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The Journal of Heredity 2002:93(1)
© 2002 The American Genetic Association 93:42-47

Maize Tertiary Trisomic Stocks Derived From B-A Translocations

D. L. Auger, and J. A. Birchler

From the Division of Biological Sciences, University of Missouri, Columbia, MO 65211.

Address correspondence to James A. Birchler, University of Missouri, Division of Biological Sciences, 117 Tucker Hall, Columbia, MO 65211-7400, or e-mail: birchlerj{at}missouri.edu.

Reciprocal translocations between supernumerary B chromosomes and the basic complement of A chromosomes in maize have resulted in a powerful set of tools to manipulate the dosage of chromosomal segments. From 15 B-A reciprocal translocation stocks that have the B-A chromosome genetically marked we have developed tertiary trisomic stocks. Tertiary trisomics are 2n + 1 aneuploids where the extra chromosome is a translocation element, in this case a B-A chromosome. Whereas B-A translocations produce aneuploidy in the sperm, the tertiary trisomic plant efficiently transmits hyperploid gametes maternally. Because the B-A tertiary trisomic stocks and the B-A translocation stocks from which they were derived are introgressed into the W22 inbred line, the effects of maternally and paternally transmitted trisomic B-A chromosomes can be compared. Data are presented on both the male and female transmission rates of the B-A chromosomes in the tertiary trisomic stocks.


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Home page
 GeneticsHome page
W. F. Sheridan and D. L. Auger
Construction and Uses of New Compound B-A-A Maize Chromosome Translocations
Genetics, December 1, 2006; 174(4): 1755 - 1765.
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