Pollen Quantity and Viability Affect Seed Yields from Controlled Pollinations of Loblolly Pine
Four quantities (0.25 to 2.00 cm³) and seven viabilities (0 to 89%) of loblolly pine (P. taeda L.) pollen were evaluated in all combinations for their effect on seed yields after use in controlled pollinations. Yields of developed and filled seeds as well as apparent pollination effectiveness were more strongly due to increasing viability than to increasing pollen quantity. The percent of filled seeds was only slightly affected by either pollen viability or quantity. Increased quantities of pollen with viability of less than 50% resulted in only minor increases in seed yields. To compensate for low viability of pollen lots, pine breeders should increase the number of flowers pollinated rather than the quantity of pollen per bag. South. J. Appl. For. 10:78-80, May 1986.
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Document Type: Journal Article
Affiliations: USDA Forest Service, Georgia Forestry Center, Macon, GA 31020
Publication date: 01 May 1986