Methods for stabilizing and controlling apomixis

Details Methods for stabilizing and controlling apomixis Methods for stabilizing and controlling apomixis

2004-02-06

2009-12-29

Grunberg, Anne Marie (Department: 1638)

Multicellular living organisms and unmodified parts thereof and

Method of using a plant or plant part in a breeding process...

C800S271000

Reexamination Certificate

active

07638680

ABSTRACT:
Methods are disclosed for detecting genetic instability for apomixis in angiospermous plant, and for enhancing, genetically stabilizing, and controlling apomixis expression in such plants. Enhanced expression, stabilization, and control are achieved by converting a facultative apomict to obligate apomixis. Enhanced expression of apomixis is further achieved by increasing frequencies of unreduced egg formation and/or parthenogenesis. Genetic stabilization of apomixis is alternatively achieved by conferring mechanisms to a facultative apomict that, during facultative sexual seed formation, prevent the segregational loss of unique alleles at multiple loci, which cause apomixis, such that progeny produced sexually from the facultative apomict inherit the unique allelic combinations required to maintain apomixis. The disclosed methods are used in various combinations to produce apomictic plants that possess improved yield, quality, and/or seed production characteristics.

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