Abstract
Recent studies have shown independent control of apomixis elements (restitution/diplospory, parthenogenesis and autonomous endosperm) in Taraxacum sect. Ruderalia. We studied inheritance of apomixis elements in the section Palustria using the crosses between various sections used as mother plants and apomictic T. paludosum (sect. Palustria) as pollen donor. Non-apomictic plants prevailed in F1 progeny, and a high incidence of sterility was observed. Triploid non-apomictic F1 hybrids were backcrossed with diploids (sects. Ruderalia, Palustria) and tetraploids (sects. Palustria, Piesis), and produced various types of progeny. These F1 hybrids were classified into three types depending on the occurrence of parthenogenesis along with restitution, and the occurrence of various progeny in particular crosses (i.e. within the same mother plant) was observed. The results indicate the independent genetic control of all apomixis elements in T. paludosum, and recombinations during a restitutional megasporogenesis in hybrids.
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