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Allozyme Analysis of Pitch X Loblolly Pine Hybrids Produced by Supplemental Mass-Pollination

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Abstract:

Allozyme genetic markers were used to evaluate the effectiveness of supplemental mass-pollination for the production of pitch X loblolly pine hybrids. On the basis of the frequency of a loblolly pine (Pinus taeda L.) marker in the pollen pools (gametes effective in fertilization) of six mass-pollinated clones of pitch pine (Pinus rigida Mill.), the average proportion of hybrid seed set was estimated as 0.11; however, that estimate varied considerably among clones (0.01-0.32). Proportions of hybrids in 1-year-old nursery-grown progeny, as estimated by morphological features, also varied widely among clones, but averaged 0.20. The discrepancy between the allozyme and nursery estimates and the low frequency of hybrids are discussed, emphasizing the potential usefulness of allozyme markers in future studies of supplemental mass-pollination. Forest Sci. 29:423-432.

Keywords: Pinus rigida; Pinus taeda; genetic marker; pollen pool

Document Type: Journal Article

Affiliations: Assistant Professor, School of Forestry, Oregon State University, Corvallis, OR 97331

Publication date: June 1, 1983

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