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Polyploidy as a dramatic mutational event in the process of
evolution has wide implications in nature and for the generation of
new and improved crops. The three day Conference on POLYPLOIDY:
BIOLOGICAL RELEVANCE focused on three aspects of this natural
phenomenon: the first emphasized the characteristics of polyploidy,
the second described the occurrence of polyploidy among plants and
animals, and the third considered past and future areas of both
fundamental and pragmatic research that involve polyploidy. New
information relative to origin, cytogenetics, ecology, physiology,
biochemistry, and populational studies stress the need to reexamine
current views on the origins of polyploidy and its significance
among both plants and animals. There are major differences in the
occurrence of polyploidy between. plant groups and it is proving a
much more common event among bisexual vertebrates than heretofore
considered possible. Crop development and improvement must utilize
approaches based fundamentally on more natural systems; in fact
future research should focus more on polyploidy as a natural
phenomenon that needs study at all levels of endeavor from
field-oriented populational aspects to sophisticated molecular
analyses and genome manipulations. This volume provides a summary
of current knowledge of polyploidy pertinent to botanists,
zoologists, and agriculturists who are interested in the evolution
o natural systems and who are concerned with the contribution that
crop improvement can make to human well-being. Walter H. Lewis St.
Louis, Missouri October, 1979 v ACKNOWLEDGMENTS The Host Committee
thanks all speakers and moderators for their generous contribution
to the Conference and to this volume.
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