Microsporogenesis and pollen viability in New Zealand taxa of Pomaderris Labill. (Rhamnaceae)

P. hamiltonii, P. phylicifolia var. ericifolia, (2n = 36). P. prunifolia var. edgerleyi, (2n = 37), and P. rugosa (20 = 48), showed varymg degrees of restitution at meiosis to give large, unreduced, pollen grains. Restitution was correlated with high univalent frequency per cell, and restituting cel...

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