Genetic improvement of shortleaf pine on the Mark Twain, Ouachita, and Ozark National Forests (2006)Studyvin, C., & Gwaze, D. (2006). Genetic improvement of shortleaf pine on the Mark Twain, Ouachita, and Ozark National Forests. Paper presented at the Shortleaf pine restoration and ecology in the Ozarks: proceedings of a symposium, Springfield, MO. Gen. Tech. Rep. NRS-P-15. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 84-88. Retrieved from https://www.nrs.fs.fed.us/pubs/gtr/gtr_p-15%20papers/11studyvin-p-15.pdf A genetic conservation and breeding program for shortleaf pine (Pinus echinata Mill.) was initiated in the 1960s by the Mark Twain National Forest in Missouri. Superior trees were selected from natural stands throughout the Forest. Fifty of the top-ranked superior trees were grafted into a fi rst generation seed orchard at the Ouachita National Forest in central Arkansas. Major seed collections from the clonal seed orchard were made in 1981, 1983, 1986 and 2003. Thirteen open pollinated progeny tests were established in the early to mid-1980s to evaluate orchard parents and obtain data to rogue the orchard. About half of these tests were lost or severely damaged by severe heat and drought in 1980 and 1983. A control pollinated progeny test was established in 2002 to further evaluate parents in the seed orchard, and to develop a second generation seed orchard. Progeny test results suggested that genetic variation exists in shortleaf pine, and genetic gain is predicted to be significant
https://www.nrs.fs.fed.us/pubs/gtr/gtr_p-15%20papers/11studyvin-p-15.pdf |
