Number, morphology and C banding variability of B chromosomes in Aegilops speltoides Tausch
Keywords:Aegilops speltoides, B-chromosomes, C-banding
Plants of the species Aegilops speltoides were collected in six localities of Israel: Haifa 1, Haifa 2, Ramat. Ara, Benaya and Ashkelon. They were studied for B chromosome polymorphism. Benaya and Ashkelon, located to the South of the Mediterranean coast, lack B chromosomes (Bs), while Haifa 1, Haifa 2, Ramat and Ara, located to the North, have Bs. It seems that Bs are present only in populations living in localities favourable for the species. We found variability for C heterochromatin in the Bs. The standard type ís submetacentric, with a large pericentromeric C-band, and two small C-bands, one on each arm. The pericentromeric C-band is constató while the other C-bands are highly variable. The most frequent B types found in these populations can be explained by recombination between Bs with and without C-bands. We have also found Bs with structural mutations. This highly polymorphic structure of the Bs can be explained by their lack of specific genetic function.
How to Cite
Copyright (c) 1997 Consejo Superior de Investigaciones Científicas (CSIC)
This work is licensed under a Creative Commons Attribution 4.0 International License.© CSIC. Manuscripts published in both the printed and online versions of this Journal are the property of Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.
All contents of this electronic edition, except where otherwise noted, are distributed under a “Creative Commons Attribution 4.0 International” (CC BY 4.0) License. You may read here the basic information and the legal text of the license. The indication of the CC BY 4.0 License must be expressly stated in this way when necessary.
Self-archiving in repositories, personal webpages or similar, of any version other than the published by the Editor, is not allowed.