Acknowledgements.....iii
List of tables.....vi
List of figures.....viii
Chapter One: Thesis Introduction
Pawpaw taxonomy and biology .....1
The domestication of pawpaw .....3
Pawpaw genetic diversity .....6
Propagation of pawpaw .....6
Layering.....10
Juvenility.....14
Hypotheses and Objectives.....16
Chapter Two: The Influence of Juvenility and IBA Concentration on Rooting of the North American Pawpaw in a Trench Layering System
Introduction.....18
Materials and Methods
Plant material.....20
Trench layering methods.....21
Experimental and treatment design.....21
Statistical analysis.....22
Results
2002 Experiment.....22
2003 Experiment.....23
Discussion.....23
Conclusions.....26
Chapter Three: The Influence of Age, Auxin Concentration, and Auxin Application Method on the Rooting of Pawpaw in a Pot Layering System
Introduction.....29
Materials and Methods
Plant material.....31
2003 Seedling Experiment.....31
2003 Grafted Cultivar Experiment.....33
2004 Seedling Experiment.....33
Statistical analysis.....34
Results
2003 Seedling Experiment.....34
2003 Grafted Cultivar Experiment.....35
2004 Seedling Experiment.....35
Discussion.....36
iv