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Statistical analysis of chromosome distribution to the poles in interspecific hybrids with variable chromosome pairing

Published online by Cambridge University Press:  14 April 2009

A. G. Sficas
A. G. Sficas
Affiliation:
North Carolina State College, Raleigh, North Carolina, U.S.A.
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A probability distribution of chromosome separation to the poles was developed to test the randomness of movement of univalents in asynaptic material where a variable amount of meiotic pairing occurs. Two tables were calculated, one for 24 chromosomes which can be used for any even number equal or less than 24, and the other for 19 chromosomes which can be used for any odd number equal or less than 19.

Three Nicotiana hybrids, namely N. glutinosa × N. otophora, N. glutinosa, N. sylvestris, and N. tabacum × N. glutinosa, and one polyhaploid were investigated. All hybrids had a tendency towards an equal distribution of unpaired chromosomes to the poles. The polyhaploid N. tabacum (with a substituted N. plumbaginifolia chromosome) had an opposite tendency, i.e. towards a flatter distribution than expected from random distribution of univalents. A short discussion of the problem is given.

Type
Research Article
Information
Genetics Research , Volume 4 , Issue 2 , July 1963 , pp. 266 - 275
Copyright
Copyright © Cambridge University Press 1963

References

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