USDA PECAN BREEDING PROGRAM

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Presentation transcript:

USDA PECAN BREEDING PROGRAM Tommy Thompson and L. J. Grauke Webpage http://extension-horticulture.tamu.edu./carya/

This is the 27th Cultivar Released by the USDA-ARS Pecan ‘Mandan’ Pecan Tommy Thompson and L. J. Grauke The Mandan are a Siouan Tribe that was Originally Found near the Heart River in North Dakota. This is the 27th Cultivar Released by the USDA-ARS Pecan Breeding Program.

Mandan 85-1-2 ‘Mandan’ Pedigree BW-1 Major Osage Evers From Green R. KY Osage Evers Mexican Seedling

Yield (Pounds per Tree) at Brownwood, TX 1999 2000 2001 2002 2003 2004 2005 2006 2007 Total Mandan 1.0 1.4 11.6 14.8 6.4 Freeze 42.6 26.7 47.0 151.5 Pawnee 1.7 0.8 14.1 24.4 4.2 31.3 24.6 59.2 160.4 Desirable 0.1 0.4 6.9 9.9 22.6 39.2 11.3 55.0 145.4 Wichita 1.8 27.9 25.0 10.0 53.8 6.3 0.0 126.2

Nut Quality at Brownwood, TX Percent Kernel Nuts Per Pound 1999-2007 Mandan 60.4 50.8 Pawnee 57.6 51.6 Desirable 47.8 Wichita 57.7 58.3

Shuck Split Date and Kernel Color at Brownwood, TX 70% Shuck Split Date Kernel Color (1=lightest) 2005-2007 1999-2007 Mandan Sept. 16 2.9 Pawnee Sept. 20 2.7 Desirable Oct. 21 Wichita Oct. 24 3.0

Scab Ratings at Brownwood, TX in 2004, 2005, and 2007 1=no scab, 5= severe scab Variety Leaf Scab Nut Scab Mandan 1.6 1.4 Pawnee 1.9 Desirable 2.0 Wichita 4.0 4.5

Mandan Dichogamy – College Station, TX - 2007 Date and Day of Year April 10 100 May 10 130 April 20 110 April 30 120 Caddo Mandan Pawnee Type I Cheyenne Creek Osage Wichita Nacono Type Hopi II Lakota Kanza Pollen Shed Pistil Receptivity

Mandan Budbreak Ratings Brownwood, TX - April 2, 2003 Variety Rating Duncans-'s MRT Navaho 4.3 a Wichita 3.5 cde Desirable 2.9 fghi Pawnee Mandan 2.1 l 1 = Dormant 2 = Bud swell 5 = Leaf expansion

Mandan Limb Structure

Mandan Bark

Mandan Medium Nut Size & Excellent Kernel Quality Medium Precocity & High Production Early Nut Maturity (One Week before Pawnee) Strong Tree Structure, Wind Resistant Good Resistant to Scab Excellent Pollenizer for Kanza, Wichita, Etc. Winter Hardy for Northern Area