Chromosoma

, Volume 59, Issue 1, pp 73–81 | Cite as

The cytology of the genus Briza L. (Gramineae)

III. B chromosomes
  • B. G. Murray
Article
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Accepted:

Abstract

B chromosomes have been found in populations of Briza spicata, B. elatior and both diploid and tetraploid races of B. media. In B. media the B chromosomes show non-Mendelian inheritance with an accumulation mechanism on the male side. At meiosis B chromosomes have no apparent effect on chiasma frequency in either B. media or B. elatior. F1 hybrids of B. media and B. elatior, in the absence of B chromosomes, have high chiasma frequencies but with the addition of B chromosomes there is a considerable reduction in the chiasma frequency of these plants. In the F1 hybrids there is a very marked dosage effect of B chromosome number on chiasma frequency.

Keywords

Developmental Biology Chromosome Number Dosage Effect Considerable Reduction Apparent Effect 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • B. G. Murray
    • 1
  1. 1.Department of Botany and BiochemistryWestfield College (University of London)LondonEngland

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