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Broadening the Genetic Base of Papaya via Intergeneric Hybridization with Wild Relatives

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Title: Broadening the Genetic Base of Papaya via Intergeneric Hybridization with Wild Relatives
Authors: Hoover, Gregory
Keywords: Papaya
Crop wild relatives
Intergeneric hybridization
Embryo rescue
show 1 morePolyploidy
show less
Issue Date: Dec 2016
Publisher: [Honolulu] : [University of Hawaii at Manoa], [December 2016]
Abstract: Pre-breeding of papaya by hybridizing it with wild relatives could yield new traits of value to papaya production, both for agricultural (e.g. disease resistance) and consumer oriented (e.g. flavor components) traits. Hybrids between papaya and its closest major relatives, the Vasconcellea, ultimately result in sterile progeny. Here, inducing tetraploidy is proposed as a method of overcoming that sterility. Crosses were made between papaya and several Vasconcellea species by utilizing embryo rescue techniques. These hybrids were then treated with a mitotic inhibitor, oryzalin, to produce plants with tetraploid tissues. Thus far, flowering has occurred in interspecific hybrids, resulting in the production of larger, yet well formed, pollen grains.
Description: M.S. University of Hawaii at Manoa 2016.
Includes bibliographical references.
Appears in Collections:M.S. - Tropical Plant and Soil Sciences

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