Summary
In colchicine induced tetraploid hybrids between Briza media and Briza elatior, B chromosomes are shown to reduce homoeologous chromosome pairing. Large numbers of Bs have a considerably greater effect than small numbers on the frequency of multivalents and bivalents. A possible mechanism to explain the effects of B chromosomes on chromosome pairing in species hybrids is suggested which is related to the mechanism that prevents pairing between A and B chromosomes.
Similar content being viewed by others
Article PDF
References
Evans, G M, and Macefield, A J. 1972. Suppression of homoeologous pairing by B chromosomes in a Lolium species hybrid. Nature New Biol, 236, 110–111.
Evans, G M, and Macefield, A J. 1973. The effect of B chromosomes on homoeologous pairing in species hybrids. I. Lolium temulentum × Lolium perenne Chromosoma (Berl.), 41, 63–73.
Evans, G M, and Macefield, A J. 1974. The effect of B chromosomes on homoeologous pairing in species hybrids. II. Lolium multiflorum × Lolium perenne. Chromosoma (Berl.), 45, 369–378.
Murray, B O. 1976. The cytology of the genus Briza L. (Gramineae). III. B chromosomes. Chromosoma (Berl.), 59, 73–81.
Taylor, I B, and Evans, G M. 1976. The effect of B chromosomes on homoeologous pairing in species hybrids. III. Intraspecific variation. Chromosoma (Berl.), 57, 25–32.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Murray, B. B Chromosomes and multivalent formation in tetraploid hybrids between Briza media and Briza elatior. Heredity 41, 227–231 (1978). https://doi.org/10.1038/hdy.1978.91
Received:
Issue Date:
DOI: https://doi.org/10.1038/hdy.1978.91
This article is cited by
-
A taxometric analysis of seed proteins in the genusBriza s. l. (Poaceae)
Plant Systematics and Evolution (1986)
-
Quantitative analysis of diploid translocation heterozygotes: test of models and equations
Theoretical and Applied Genetics (1986)
-
Suppression of multivalent formation by B chromosomes in natural and artificial autopolyploids of scurvy-grass (Cochlearia L.)
Theoretical and Applied Genetics (1981)
-
Interaction between rye B-chromosomes and wheat genetic systems controlling homoeologous pairing
Chromosoma (1980)