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Northern Research Station
11 Campus Blvd., Suite 200
Newtown Square, PA 19073
(610) 557-4017
(610) 557-4132 TTY/TDD

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Hardwood Tree Improvement and Regeneration

Hardwood Tree Improvement and Regeneration Center

Research Work Unit NRS-14

Black walnut treeOur research mission

is to develop genetic, molecular, and tissue culture technologies and forest and nursery management guidelines for improvement of central hardwood forest productivity. more>>

Our Research Areas

We are :

 Developing hardwood (oak and walnut) molecular markers for use in determination of genetic quality and population structure of current natural forests and plantations, and quantitative genes in superior hardwood trees. more>>

 Developing vegetative and tissue culture propagation technologies for use in genomics research and mass propagation systems for superior trees. more>>

 Developing nursery guides for production of quality seedlings and forest management guides for regeneration and reforestation of degraded agricultural land and riparian zones. more>>

 Developing breeding and selection programs for black walnut, black cherry and northern red oak. more>>

Our Latest Products

 Lawson, S.S., Pijut, P.M., and Michler, C.H. 2013. Species selection in hardwoods research: variations in baseline physiological responses of select temperate hardwood tree species. Journal of Forestry Research 24(2): 285-292.

 Swihart, R.K., Saunders, M.R., Kalb, R.A., Haulton, G.S., Michler, C.H. 2013. The Hardwood Ecosystem Experiment: a framework for studying responses to forest management. Gen. Tech. Rep. NRS-P-108. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station 350 p.

 Yu, X., Bai, G., Liu, S., Luo, N., Wang, Y., Richmond, D.S., Pijut, P.M., Jackson, S.A., Yu, J., and Jiang, Y. 2013. Association of candidate genes with drought tolerance traits in diverse perennial ryegrass accessions. Journal of Experimental Botany 64 (6):1537-1551.

 Beheler, B.D., and Michler, C.H. 2013. Herbicide practices in hardwood plantings. In: Van Sambeek, J.W.; Jackson, E.A.; Coggeshall, M.V.; Thomas, A.L.; Michler, C.H. eds. Managing fine hardwoods after a half century of research: Proceedings of the Seventh Walnut Council Research Symposium; 2011 August 1-3; Madison, WI. Gen. Tech. Rep. NRS-P-115. Newtown Square, PA; U.S. Department of Agriculture, Forest Service, Northern Research Station: p. 68-83.

Last Modified: 06/02/2014

What is HTIRC?
The Hardwood Tree Improvement & Regeneration Center (HTIRC)

... is a collaborative regional research, development and technology transfer effort between industry, university, private, state and federal entities to advance tree improvement of central hardwoods for increased forest productivity in hardwood restoration and reforestation programs.

Visit our Purdue University partner site.

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