Genetics of pure and mixed family plot yields in loblolly pine

Mixed and pure family plots of 10 half-sib families of loblolly pine (Pinus taeda L.) were planted in replicated experiments at two spacings on two sites in south Mississippi and Louisiana. Plots sizes were 70 trees (10 x 7 tree blocks) with three complete replications per spacing per site. Tree spacings were 1 x 2 and 2 x 2 meters (~2000 and ~1000 TPA, respectively) and individual tree measurements were made at ages 5, 10 and 15 years. Mixed plots consisted of paired families randomized in 75/25 and 25/75 ratios of trees planted as well as all families in randomized rows and all families in random mixes.


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Author(s): C. Dana Nelson

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