Research Note

Controlled Pollination in Pinus Patula: Constraints and Possible Solutions


Abstract

Pinus patula is the most important commercial pine species grown in southern Africa and it is, therefore, very important to have well developed breeding and production strategies for this species. Strategies which have been developed for SAFCOL's breeding programme include controlled pollination, but due to several limiting factors, this is not a feasible option at this stage. Limiting factors include high abortion rate, low seed set and the low number of flowers per tree. The current abortion rate of 70% and a seed set of 10 full seeds per cone require that more than 11000 flowers need to be pollinated annually. Research projects and possible techniques to overcome these problems are discussed.

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