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Chapter 5. Russet- Skinned Fresh Market Potato Variety Trial, 2006¹

C.M. Hutchinson and Doug Gergela²

General Comments: A goal of the Russet-Skinned Fresh Market Potato Variety trial is to identify a short-season russet skinned variety that produces a marketable crop under short-day production. Successful russet varieties could be grown for processing or for the fresh market. There is no current standard for North Florida production.
Planting Information
Planting Site	PSREU - Hastings Farm, Hastings, FL
Planting Date	January 31, 2006
Vine Kill Date	April 28, 2006
Harvest Date	May 30, 2006
Season Length	87 days planting to vine kill; 119 days planting to harvest
Fertilizer Program	preplant, 100-43-86 lb/A; sidedress, 65-0-56 lb/A; (2 appl.)
Irrigation Program	seepage
Experimental Design
Number of Varieties	7 (Standard: Goldrush)
Number of Clones	1
Within Row Spacing	8 in (20 cm)
Between Row Spacing	40 in (102 cm)
Replications	4
Plot Size	16 ft (4.9 m)
Production Statistics
Early Vigor Ratings	41 days after planting
Highest Total Yield	Goldrush (331 cwt/acre or 37.1 MT/ha)
Highest Marketable Yield	Goldrush (223 cwt/acre or 25.0 MT/ha)
Best Appearance Rating	Goldrush, Amey, Belrus and Ranger Russet (7.0, good to excellent)

Tables

Table 2. Production statistics for Russet-Skinned potato selections.

	Total	Marketable Yield1		Size						Size Class
	Yield		% of	Distribution by Class (%)2						Range (%)		Specific
Clone	(cwt/A)	(cwt/A)	standard	C	B	A1	A2	A3	A4	A1 to A3	A2 to A3	Gravity
Goldrush	331	223	100	1	19	74	6	0	0	80	6	1.066
Amey	221	178	80	1	14	84	1	0	0	85	1	1.074
Belrus	247	153	69	1	18	78	3	0	0	81	3	1.073
Ranger Russet	269	176	79	1	24	74	1	0	0	75	1	1.069
Russet Burbank	300	134	60	3	45	52	0	0	0	52	0	1.066
Russet Norkotah	193	31	14	5	57	38	0	0	0	38	0	1.058
Umatilla Russet	283	146	65	2	40	58	0	0	0	58	0	1.070
B2232-3	220	128	57	2	27	71	0	0	0	71	0	1.073
MSD3	55	80		ns	ns	12	ns	0	0	14	ns	0.003
P Value	0.0004	0.0261		0.0877	0.0666	0.0376	0.0818	-	-	0.0475	0.0818	0.0001
1Marketable Yield: size classes A1 to A3. 2Size classes: C = .5 to 1.5" , B = 1.5 to 1 7/8", A1 = 1 7/8 to 2.5", A2 = 2.5 to 3.25", A3 = 3.25 to 4", A4 = >4" 3Means separated within columns by Tukey's Studentized Range (HSD) Test.

Table 3. Plant growth and tuber characteristics of Russet-Skinned potato selections.

	Plant Growth Characteristics1				Tuber Characteristics2
	%	Early	Vine	Vine
Clone	Stand	Vigor	Type	Maturity	IFC	SC	ST	TS	ED	APP	Tuber Comments
Goldrush	96	5.5	8.8	8.3	2.0	4.0	2.0	4.0	6.0	7.0	sl. skinned
Amey	99	5.8	8.3	7.3	2.0	4.0	2.0	4.0	7.0	7.0	attractive
Belrus	96	4.3	8.8	8.0	1.0	4.0	2.0	4.0	5.0	7.0	attractive
Ranger Russet	100	5.3	9.0	7.0	1.0	5.5	4.0	4.0	4.0	7.0	attractive
Russet Burbank	96	4.8	9.0	8.0	1.0	5.0	3.0	4.0	5.0	6.0	many shapes
Russet Norkotah	70	2.0	8.0	9.0	2.0	5.0	3.0	3.0	5.0	5.0	many shapes
Umatilla Russet	100	5.3	8.8	7.8	2.0	5.0	3.0	4.0	6.0	5.0	flat and pointy
B2232-3	99	4.3	7.3	7.8	1.0	4.0	2.0	4.0	7.0	6.0	sl. flat
1See rating system outlined in Chapter 1. 2See rating system outlined in Chapter 1.

Table 4. External and internal defects of Russet-Skinned potato selections.

	% External Tuber Defects					% Internal Defects2
	Growth	Mis-	Sun-	Rotten	Total					Brown Center
Clone	Cracks	shapen	burned	& misc.	Culls1	HH	BR	CRS	IHN	L	M	H
Goldrush	0	2	0	13	15	0	0	0	0	0	0	0
Amey	0	0	0	7	7	0	0	0	0	0	0	0
Belrus	0	1	1	22	23	0	0	0	0	1	0	0
Ranger Russet	0	1	0	12	13	0	0	0	0	0	0	0
Russet Burbank	0	2	0	14	16	1	0	0	0	6	6	0
Russet Norkotah	0	1	0	59	60	0	0	0	0	0	0	0
Umatilla Russet	0	1	0	12	13	0	0	0	1	1	0	0
B2232-3	0	2	0	17	19	0	0	0	0	0	0	0
MSD3	0	ns	ns	ns	ns	0	0	0	0	ns	0	0
P Value	-	0.0738	0.5493	0.3010	0.3027	-	-	-	-	0.4363	-	-
1Percent of Total Yield. Total culls include the sum of growth cracks, misshapen, sunburned and rotten/misc. 2Percent tubers; HH, hollow heart; BR, brown rot; CRS, corky ring spot; IHN, internal heat necrosis. Brown Center: L = Light, M = Moderate, H = Heavy 3Means separated within columns by Tukey's Studentized Range (HSD) Test.

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Footnotes

1. This document is HS1090, one of a series of the Horticultural Sciences Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Original publication date June, 2007. Visit the EDIS Web Site at http://edis.ifas.ufl.edu.

2. Chad M. Hutchinson, Associate Professor, Doug Gergela, Sr. Biological Scientist, Horticultural Sciences Department, Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, 32611.

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