Methods for increasing the frequency of apomixis expression in angiosperms

A technology of apomictic reproduction and increasing frequency, applied in the field of increasing the expression frequency of apomictic reproduction in angiosperms, and can solve the problems of low apomictic penetrance, instability, etc.
CN1984557AInactive Publication Date: 2007-06-20UTAH STATE UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UTAH STATE UNIVERSITY
Publication Date
2007-06-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention is directed to the seed-to-seed perpetuation of hybrid vigor and other traits through apomixis (asexual seed formation) in flowering plants (angiosperms). More particularly, to predictable methods for producing, from sexual or facultatively-apomictic plants, progeny plants that express an increased percentage of apomictic seed set or one or more elements of apomixis. This invention uses: plant cytoembryology procedures to identify and select a plant or group of plants that possess appropriate genetic variability for initiation times and durations of megasporogenesis (female meiosis), embryo sac formation, egg and central cell formation and maturation, fertilization, embryony and endosperm formation; plant breeding procedures to produce numerous and divergent genetically-recombined early to late generation progeny such that embryo sac formation preempts megasporogenesis and embryony preempts fertilization; and plant cyto-embryology or progeny test procedures to select segregant plants that express an increased frequency of one or more elements of apomixis.
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Description

technical field

[0001] The present invention relates to the perpetuation of heterosis and other traits in flowering plants (angiosperms) from seed to seed by apomictic (vegetative seed formation) means. More specifically, the present invention provides a predictable method for producing progeny plants from sexual or facultative apomictic plants expressing an increased percentage of ovules in which normal sexual development is replaced by asporotic or diapomic diplosporous (apomictic) embryo sac formation, parthenogenesis (formation of an embryo from an egg without fertilization), adventitious embryony (formation of an embryo from a cell other than an egg), or autonomous type (central cells unfertilized) or pseudofertilized type (central cell fertilization) instead of endosperm formation. The present invention also describes the embryological phenotypes necessary for mapping and cloning the genes responsible for apomixis. The present invention: the use of plant cell embryolog...

Claims

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