Sex ratio variation and sex determination in Urtica dioica

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Sex ratio variation and sex determination in Urtica dioica

Type: Doctoral Thesis
Title: Sex ratio variation and sex determination in Urtica dioica
Author: Glawe, Grit Anja
Publisher: Institute of Biology, Faculty of Mathematics and Natural Sciences, Leiden University
Issue Date: 2006-10-05
Keywords: Sex ratio variation
Sex determination
Dioecy
Urtica dioica
Abstract: This thesis will first document on variation in progeny sex ratios among individual female plants of Urtica dioica at our field site in Meijendel (Chapter 2). Next, we show that there is also considerable sex ratio variation among male and female flowering shoots in 26 natural populations studied (Chapter 3). Additionally, we studied life history traits of male and female clones to detect sex-specific differences that might have contributed to the sex ratio bias observed in the field. Our results indicate that the sex ratio bias in natural populations may be a consequence of a bias that already originated in the primary sex ratio. Next, we investigated physiological, environmental (Chapter 4) and genetic (Chapter 5) aspects of sex determination. For the latter aspect, a series of crosses including male, female and monoecious plants of U. dioica was performed. These experiments were designed to investigate whether sex ratio variation in the primary sex ratio is due to environmental sex determination (ESD) or genetic sex determination (GSD) solely or due to an interaction of both. Genetic mapping of sex-linked markers was used as a supplementary tool to analyze the genetic mechanism of sex determination (Chapter 6). Finally, to study the inheritance pattern of the sex ratio trait, crosses were performed between individual male and female plants from different sex ratio families (Chapter 7).
Description: Promotor: E. van der Meijden, Co-Promotor: T.J. de Jong
With Summaries in Dutch and German
Faculty: Faculteit der Wiskunde en Natuurwetenschappen
Citation: Glawe, G.A., 2006, Doctoral Thesis, Leiden University
ISBN: 9064640262
9789064640261
Handle: http://hdl.handle.net/1887/4583
 

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application/pdf Epilogue, Curriculum vitae, Publications 93.72Kb View/Open
application/pdf Summary in German 97.30Kb View/Open
application/pdf Summary in Dutch 86.29Kb View/Open
application/pdf References 115.3Kb View/Open
application/pdf Summary, Conclusions 101.8Kb View/Open
application/pdf Chapter 7 172.5Kb View/Open
application/pdf Chapter 6 316.6Kb View/Open
application/pdf Chapter 5 223.7Kb View/Open
application/pdf Chapter 4 188.9Kb View/Open
application/pdf Chapter 3 188.5Kb View/Open
application/pdf Chapter 2 156.8Kb View/Open
application/pdf Chapter 1 329.0Kb View/Open
application/pdf Title page, Contents 101.7Kb View/Open
application/pdf Propositions 5.922Kb View/Open
text/html Links to published articles 7.518Kb View/Open

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