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Metaphase position and orientation of an interchange quadrivalent of Allium triquetrum: II. Changes in position with changes in percentage alternate orientation

Published online by Cambridge University Press:  14 April 2009

Geoffrey K. Rickards
Geoffrey K. Rickards
Affiliation:
Botany Department, Victoria University of Wellington, Private Bag, Wellington, New Zealand

Summary

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The position and orientation of an interchange quadrivalent in flattened lateral views of metaphase I were studied in inflorescences of an interchange heterozygote of Allium triquetrum showing high, medium and low alternate orientation frequencies. As the overall frequency of alternate orientation changes in these different inflorescences so the positioning of the alternately oriented quadrivalents changes, in that it becomes more like that of the adjacent quadrivalents. The present data argue for the biological significance of the position/orientation data, and imply the presence of two components of alternately oriented quadrivalents with different positional characteristics.

Type
Short Paper
Information
Genetics Research , Volume 45 , Issue 2 , April 1985 , pp. 199 - 203
Copyright
Copyright © Cambridge University Press 1985

References

REFERENCES

Rickards, G. K. (1977). Prometaphase I and anaphase I in an interchange heterozygote of Allium triquetrum (Liliaceae). Chromosoma 64, 1–23.Google Scholar
Rickards, G. K. (1983). Orientation behavior of chromosome multiples of interchange (reciprocal translocation) heterozygotes. Annual Review of Genetics 17, 443–498.Google Scholar
Rickards, G. K. (1984). Position and orientation in the metaphase equator of an interchange quadrivalent of Allium triquetrum. Genetical Research 43, 139–148.CrossRefGoogle Scholar