... growing and hybridizing all kinds of plants in zone 6b Maryland since the 1980's.

Wednesday, September 19, 2012

Some rose seeds

Some seeds harvested yesterday... the first plate is from two hips of Rosa glutinosa that resulted from pollen of Rosa fedtschenkoana - should give some interesting scented-foliage offspring. The second plate gives an idea how "fertility-challenged" my F1 (glutinosa X palustris) hybrid seedling is. These seeds (around 30) came from about two dozen open-pollinated hips. Most of these hips contained only one single seed. Just a few had two, and one hada whopping four. Actually most of the hips had aborted soon after petal drop, presumably because they didn't have any seeds at all. So... I wonder who the pollen parent of these seeds might be and what ploidy (and fertility they'll have). Rosa glutinosa is supposed to be a Caninae type pentaploid and palustris is a diploid. The F1 should be pentaploid too, but whether or not the Caninae type meiosis held up in the hybrid could make for some unusual happenings.

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