Cytogenetic and molecular evidences revealing genomic changes after autopolyploidization: a case study of synthetic autotetraploid Phlox drummondii Hook

Cytogenetic and molecular evidences revealing genomic changes after autopolyploidization: a case... Polyploidy is known to be common in plants; indeed most of the world’s economically important crop plants are polyploids. Recent studies revealed extensive genomic changes in synthetic polyploids after genome doubling, although most of the information available is with regards to allopolyploids and little information have been generated in autopolyploids. In the present study, we used Phlox drummondii Hooker (2n = 2x = 14) as a model plant to observe genomic changes, if any, in synthetic autopolyploids. Colchitetraploids were produced and followed through different generations (C0, C1, C2 and C3). Male meiosis analysis showed differences between the frequency of both quadrivalents and bivalents from C0 to C2 generations. RAPD analysis revealed 2.8, 1.6, 2.1 and 3.2% polymorphism in C0, C1, C2 and C3 colchitetraploids respectively. The polymorphic fragments were further characterized after cloning. Dot blot assay was performed to confirm high copy/low copy nature of fragments showing variation. The analysis revealed changes in both repetitive and non-repetitive regions. Out of the six fragments only one fragment T01 was found to be of high copy, while four fragments were of the moderate copy and one fragment of the low copy nature. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physiology and Molecular Biology of Plants Springer Journals

Cytogenetic and molecular evidences revealing genomic changes after autopolyploidization: a case study of synthetic autotetraploid Phlox drummondii Hook

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Publisher
Springer India
Copyright
Copyright © 2017 by Prof. H.S. Srivastava Foundation for Science and Society
Subject
Life Sciences; Plant Sciences; Plant Physiology; Biological and Medical Physics, Biophysics; Cell Biology
ISSN
0971-5894
eISSN
0974-0430
D.O.I.
10.1007/s12298-017-0445-8
Publisher site
See Article on Publisher Site

Abstract

Polyploidy is known to be common in plants; indeed most of the world’s economically important crop plants are polyploids. Recent studies revealed extensive genomic changes in synthetic polyploids after genome doubling, although most of the information available is with regards to allopolyploids and little information have been generated in autopolyploids. In the present study, we used Phlox drummondii Hooker (2n = 2x = 14) as a model plant to observe genomic changes, if any, in synthetic autopolyploids. Colchitetraploids were produced and followed through different generations (C0, C1, C2 and C3). Male meiosis analysis showed differences between the frequency of both quadrivalents and bivalents from C0 to C2 generations. RAPD analysis revealed 2.8, 1.6, 2.1 and 3.2% polymorphism in C0, C1, C2 and C3 colchitetraploids respectively. The polymorphic fragments were further characterized after cloning. Dot blot assay was performed to confirm high copy/low copy nature of fragments showing variation. The analysis revealed changes in both repetitive and non-repetitive regions. Out of the six fragments only one fragment T01 was found to be of high copy, while four fragments were of the moderate copy and one fragment of the low copy nature.

Journal

Physiology and Molecular Biology of PlantsSpringer Journals

Published: Jun 26, 2017

References

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