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Self-Sterility in Sweetgum

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(Liquidambar styraciflua L.) trees in Florida and North Carolina yielded an average of 46 seeds per fruit after cross-pollination but only 2 seeds per fruit after self-pollination. Post-pollination cytological analysis of pistillate infloresences from two of the North Carolina trees revealed that self-fertilized ovules aborted before they reached the cellular endosperm stage. This means that outbreeding due to wind-pollination is reinforced by self-sterility. The possible relation of the breeding system to population variation is discussed.

Document Type: Journal Article

Affiliations: Associate Professor, School of Forestry, N. C. State, Raleigh, N. C.

Publication date: September 1, 1964

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