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Effect Of Genome-Plastome Interaction On Meiosis And Pollen Development In Oenothera Species And Hybrids, Michael J. Chapman, David L. Mulcahy

David L. Mulcahy

Oenothera villaricae Dietrich and Oe. picensis Dietrich, complete translocation heterozygotes, are fully interfertile, giving rise to six discrete classes of true­ breeding hybrids from a reciprocal cross. Associated with each parent and hybrid is a characteristic ab01tive non­ staining pollen fraction easily distinguished from fully developed pollen under the light microscope. Pollen abortion has been associated with translocation rings in other angiosperm species, and may characterize such sys­ tems. The abortive pollen fraction is significantly differ­ ent between reciprocal Oenothera hybrids, however (P<0.001), indicative of partial cytoplasmic control. Pol­ len abortion is most severe in the F 1 hybrid …