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Hereditary Variations in Slash Pine Tracheids

The foregoing resume of research on tracheid dimensions in coniferous species has offered strong evidence that variations in length may be genetically controlled. On the basis of this inference a project under the S-23 Regional Research Program was set up to determine the reliability of certain anatomical and cytological features of the southern pine species as criteria for the selection of breeding stock. Slash pine was selected for the first phase of the work because of the availability of parents and their open-and crosspollinated progeny. All the parent progeny material used in the study has been propagated by Mr. James Greene at the Ida Cason Callaway Foundation, Hamilton, Georgia. Trees used for natural variation in tracheid length within the stem were taken from plantings on the University Forestry School forests, located in the vicinity of Athens, Georgia. The entire investigation, thus far, has been concerned with an evaluation of the tracheid length of parents and progeny as a tool for the selection of breeding stock.

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Author(s): L. W. R. Jackson, James T. Greene

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1957