Journal
PLANT REPRODUCTION
Volume 28, Issue 2, Pages 91-102Publisher
SPRINGER
DOI: 10.1007/s00497-015-0262-6
Keywords
Meiosis; Fertilization; Apomixis; Sexuality; Seed; Maize
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Funding
- Consejo Nacional de Ciencia y Tecnologia (CONACyT)
- Consejo de Ciencia y Tecnologia del Estado de Guanajuato (CONCyTEG)
- DuPont Pioneer regional initiatives to benefit local subsistence farmers
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Key message Meiosis and unreduced gametes. Sexual flowering plants produce meiotically derived cells that give rise to the male and female haploid gametophytic phase. In the ovule, usually a single precursor (the megaspore mother cell) undergoes meiosis to form four haploid megaspores; however, numerous mutants result in the formation of unreduced gametes, sometimes showing female specificity, a phenomenon reminiscent of the initiation of gametophytic apomixis. Here, we review the developmental events that occur during female meiosis and megasporogenesis at the light of current possibilities to engineer unreduced gamete formation. We also provide an overview of the current understanding of mechanisms leading to parthenogenesis and discuss some of the conceptual implications for attempting the induction of clonal seed production in cultivated plants.
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