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Chromosoma

, Volume 43, Issue 2, pp 177–186 | Cite as

The heterochromatic B chromosome of maize: the segments affecting recombination

  • Edward J. Ward
Article

Abstract

The B chromosome of maize is known to increase recombination in specific regions of the genome. In an attempt to determine the portion of the B responsible for crossover enhancement, translocations between the B and A chromosomes were used to dissect the B into four distinct segments. The effects of the segments on crossing over were studied in a sensitive region composed of chromatin from chromosomes 3 and 9. The relatively euchromatic chromomeres terminating the B lacked enhancement activity, but the remaining segments, all of which possess large amounts of heterochromatin, were capable of elevating recombination. There was no localization of activity to a specific heterochromatic region, however.

Keywords

Developmental Biology Specific Region Heterochromatic Region Sensitive Region Enhancement Activity 
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 1973

Authors and Affiliations

  • Edward J. Ward
    • 1
    • 2
  1. 1.Department of PediatricsMcMaster UniversityHamiltonCanada
  2. 2.Biology DepartmentUniversity of WinnipegWinnipegCanada

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