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Hybridizing Pines With Diluted Pollen

Our first studies at Placerville showed that viable pollen can be diluted with dead pine pollen without ill effects. Dilutions to 50 percent live pollen did not affect cone set, total seeds per cone, or the proportion of sound seeds. Unresolved were questions of how far can we dilute and what is the effect of using pollen of different species as the diluent. A comprehensive series of interspecific hybridizations was made in 1962 to learn more about possibilities of diluting pine pollen.


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Author(s): R. Z. Callaham

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1965