Submitted to: HortScience
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: July 6, 2010
Publication Date: September 1, 2010
Citation: Thompson, T.E., Grauke, L.J. 2010. 'Mandan' Pecan. HortScience. 45(9):1392-1393. Interpretive Summary: The USDA conducts the largest pecan breeding and genetics program in the world. The program is divided into two main parts: the BBP (Basic Breeding Program) and NPACTS (National Pecan Advanced Clone Testing System). Controlled crosses are made and these seedlings are evaluated for a 10 year period on their own roots or grafted to large pollarded trees. Based upon initial performance in the BBP, a very few clones are selected to be tested in NPACTS. NPACTS tests are planned to be 15 year tests, and to duplicate the best commercial production practices for the location of the test. This is needed to identify clones that will increase orchard profitability, which is the primary goal of the USDA scion breeding program. This paper reports the performance of a new pecan cultivar named 'Mandan'. It describes the new cultivar so growers can determine if it will perform well in their particular orchards. 'Mandan' was released because of its high nut quality, high yield potential, disease resistance, excellent tree strength, early nut maturity, and late budbreak. Pecans from this cultivar are medium sized and can be sold in-shell or shelled to produce high quality intact halves and large pieces.
Technical Abstract: 'Mandan' is a new pecan [Carya illinoinensis (Wangenh.) K. Koch] cultivar released by the U. S. Department of Agriculture (USDA), Agricultural Research Service (ARS). 'Mandan' was released because of its high nut quality, high yield potential, early nut maturity, scab disease (Fusicladium effusum G. Winter) resistance, excellent tree strength, and late budbreak. 'Mandan' should be adapted to all pecan growing areas of the world. Pecans from this cultivar can be sold in-shell or shelled to produce a large proportion of halves and large pieces.