1. USDA PECAN BREEDING PROGRAM
Tommy Thompson and L. J. Grauke
Webpage

2. 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.

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

5. 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

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

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

8. 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

9. 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

10. 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 = Bud swell 5 = Leaf expansion

11. Mandan Limb Structure

12. Mandan Bark

14. 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