Effect of the epimutagen 5-azacytidine on the structure of floral-stalk metameres in sugar beet Beta vulgaris L.

Effect of the epimutagen 5-azacytidine on the structure of floral-stalk metameres in sugar beet... This study is dedicated to the effect of the epimutagen 5-azacytidine on the structure of floral-stalk metameres in sugar beet Beta vulgaris L. Simple phytomeres consist of separate flowers (unianthous plants; UA phenotype), while complex metameres occur in synanthous plants (SA phenotype). Treatment of the synanthous line msSOAN-5 dramatically reduced the number of flowers on phytomeres as early as in generation zero (A0Az0). For the first time, plants with simple phytomeres were found in this line. The proportion of plants with the UA phenotype in generation A0Az0 was 7.7%. In generation A1Az1, the tendency for reduction of the number of flowers on phytomeres persisted. The proportion of plants with simple phytomeres reached 77%; i.e., the frequency of UA phenotypes in the progeny (A1Az1) increased tenfold in comparison with the parents A0Az0. The high frequency of morphogenetic changes in the flower stem structure under the influence of the epimutagen suggests that the variability of the UA-SA character in beet populations is of epigenetic rather than mutational nature. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

Effect of the epimutagen 5-azacytidine on the structure of floral-stalk metameres in sugar beet Beta vulgaris L.

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Publisher
Springer Journals
Copyright
Copyright © 2006 by Pleiades Publishing, Inc.
Subject
Biomedicine; Microbial Genetics and Genomics; Animal Genetics and Genomics; Human Genetics
ISSN
1022-7954
eISSN
1608-3369
D.O.I.
10.1134/S1022795406070118
Publisher site
See Article on Publisher Site

Abstract

This study is dedicated to the effect of the epimutagen 5-azacytidine on the structure of floral-stalk metameres in sugar beet Beta vulgaris L. Simple phytomeres consist of separate flowers (unianthous plants; UA phenotype), while complex metameres occur in synanthous plants (SA phenotype). Treatment of the synanthous line msSOAN-5 dramatically reduced the number of flowers on phytomeres as early as in generation zero (A0Az0). For the first time, plants with simple phytomeres were found in this line. The proportion of plants with the UA phenotype in generation A0Az0 was 7.7%. In generation A1Az1, the tendency for reduction of the number of flowers on phytomeres persisted. The proportion of plants with simple phytomeres reached 77%; i.e., the frequency of UA phenotypes in the progeny (A1Az1) increased tenfold in comparison with the parents A0Az0. The high frequency of morphogenetic changes in the flower stem structure under the influence of the epimutagen suggests that the variability of the UA-SA character in beet populations is of epigenetic rather than mutational nature.

Journal

Russian Journal of GeneticsSpringer Journals

Published: Jul 17, 2006

References

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