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The endosperm of cereal grains represents the most important source of human nutrition. In addition, the endosperm provides many investigatory opportunities for biologists because of the unique processes that occur during its ontogeny, including syncytial development at early stages. Rice endospermless 1 (enl1) develops seeds lacking an endosperm but carrying a functional embryo. The enl1 endosperm...
In apomictic Hieracium subgenus Pilosella species, embryo sacs develop in ovules without meiosis. Embryo and endosperm formation then occur without fertilization, producing seeds with a maternal genotype encased in a fruit (achene). Genetic analyses in H. praealtum indicate a dominant locus (LOA) controls meiotic avoidance, and another dominant locus (LOP) controls both fertilization-independent embryogenesis...
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