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Publication #HS1294

University of Florida Potato Variety Trials Spotlight: ‘Fabula'1

Rodrick Z. Mwatuwa, Chrsitian T. Christensen, Pam Solano, and Lincoln Zotarellia2

General Comments

‘Fabula’ is a potato variety that is commonly grown for the fresh potato market. The variety was selected from progeny of a cross between ‘Monalisa’ and ‘Hudson’. It was released in 2005 by D. Biedmond B.V. of the HZPC in the Netherlands. ‘Fabula’ demonstrates good tuber characteristics and high yield superior to its commercial standard ‘LaChipper’. Tuber production and quality results provided in this spotlight are summarized from various trials conducted by the UF/IFAS Hastings Agricultural and Extension Center from 2001 to 2015, excluding 2009.

General Characteristics

‘Fabula’ tubers have a buff skin color with a slightly netted texture and creamy flesh color (Figure 1). According to Florida rating codes for potato tuber characteristics (Table 1), the tubers have a fair appearance with round to oblong shape, and eyes that are unevenly distributed with intermediate depth (Table 3). The variety has medium to long dormancy (time required for sprout emergence). This variety has high yield potential under Florida production conditions (Tables 2 and 3). On average, marketable yield is 265 cwt/acre, approximately 11% greater than the commercial standard ‘LaChipper’, with 91% of the tubers found between A1 and A3 tuber size classifications.

Figure 1. 

Typical tuber and internal fresh color of ‘Fabula’ potato variety.


Credit:

Lincoln Zotarelli, UF/IFAS


[Click thumbnail to enlarge.]

Diseases

‘Fabula’ demonstrates no incidence of hollow heart, brown rot, corky ring spot, or internal heat necrosis under Florida conditions (Table 3). It is immune to potato wart [Synchytrium endobioticum (race 1)], resistant to golden nematode (Globodera rostochiensis), and exhibits moderate resistance to leaf roll virus, potato virus Y, common scab (Streptomyces scabies), and tuber late blight (Phytophthora infestans). It is moderately susceptible to potato virus X and foliage late blight. The standard UF/IFAS Extension-recommended disease and weed control program described under “Potato Production” (Chapter 13 of the Vegetable Production Handbook for Florida http://edis.ifas.ufl.edu/cv131) should be followed.

Season Length and Growth

‘Fabula’ is a medium to late maturing variety. Under Florida conditions, the season length was 87 days on average from planting to harvesting. This depended on weather conditions during the growing season. The plants should be harvested two weeks after vine kill to improve tuber maturation and skin set. Potatoes with proper skin set maintain better skin color, lose less weight in storage, and are more resistant to bruising and soft rot. For more information about vine killing on potatoes, see Potato Vine Killing or Desiccation described in Zotarelli et al. (2011). Late in the season, tuber size should be checked regularly to harvest tubers with desirable marketable size. Soil moisture should be managed late in the season to avoid high soil moisture conditions that cause enlarged lenticels and delayed skin set.

Fertilization

UF/IFAS trial plots are normally fertilized with 200 to 230 lb/A of N. The first application of 100 lb/A of N (granular) is typically incorporated in the bed prior to planting, followed by one or two side dress fertilizer applications at emergence and/or at tuber initiation. Phosphorus and potassium applications follow the UF/IFAS guidelines described in Liu et al. (2016) and normally range between 45 to 100 lb/A of P2O5 and 170 to 235 lb/A of K2O.

Planting

A seed piece of 2.5 to 3 oz is recommended for planting. This variety should be planted with 40 inches between rows and 8 inches between plants, at 3 to 4 inches deep. A seed rate of 2,000 to 3,000 lb/acre of seed is expected.

Other Information

For additional information on cultivation, weed and disease management see the “Potato Production” chapter of the Vegetable Production Handbook available at http://edis.ifas.ufl.edu/cv131.

References

Canadian Food Inspection Agency. Fabula. http://www.inspection.gc.ca/DAM/DAM-plants-vegetaux/STAGING/text-texte/pota_vari_fabula_1312587515433_eng.pdf accessed on 08/05/2016.

Hutchinson, C. M., J. M. White, D. M., Gergela, P. A. Solano, K. G. Haynes, R. Wenrich, and C. S. Lippi. 2003. “Performance of chip processing potato varieties in northeastern Florida.” HortTechnology, 13(4), 706–711.

Liu, G., E.H. Simonne, K.T. Morgan, G.J. Hochmuth, M. Ozores-Hampton, and S. Agehara. 2016. “Fertilizer management for vegetable production in Florida.” In: Vegetable Production Handbook of Florida 2016—17. J.S. Freeman et al. (eds). Farm Media Journal. p.3–10.

Sisson, J.A. and G.A. Porter. 2002. Performance evaluations of potato clones and varieties in the northeastern states-1999. Maine Agr. For. Expt. Sta., Misc. Publ. 751.

Zotarelli, L., S. Sargent, P. Dittmar, M. Makani. 2011. Potato Vine Killing or Desiccation. HS181. Gainesville: University of Florida Institute of Food and Agricultural Sciences. http://edis.ifas.ufl.edu/hs181

Zotarelli, L., J. P. Dittmar, P. D. Roberts, P. Stansly, H. A. Smith, and S. E. Webb. 2016. Chapter 13. Potato Production. Vegetable Production Handbook for Florida, 2015–2016 Edition. HS733. Gainesville: University of Florida Institute of Food and Agricultural Sciences. http://edis.ifas.ufl.edu/cv131

Tables

Table 1. 

Florida’s rating codes for potato vine maturity and tuber characteristics.

Tuber Characteristics1

Rating Code

Vine Maturity

Internal Flesh color

Skin Color

Skin Texture

Tuber Shape

Eye Depth

Overall Tuber Appearance

1

dead

white

purple

partial russet

round

very deep

very poor

2

+-

cream

red

heavy russet

mostly round

--

--

3

yellow and dying

light yellow

pink

moderate russet

round to oblong

deep

poor

4

+-

medium yellow

dark brown

light russet

mostly oblong

--

--

5

moderatly senesced

dark yellow

brown

netted

oblong

intermediate

fair

6

+-

pink

tan

slightly netted

oblong to long

--

--

7

starting to senesce

red

buff

moderatly

mostly long

shallow

good

8

+-

blue

white

smooth

long

--

--

9

green and vigorous

purple

cream

very smooth

cylindrical

very shallow

excellent

1 Adapted from Hutchinson, C. M. et al. (2003) and Sisson, J. A. and G. A. Porter (2002).

Table 2. 

Summary of production statistics and specific gravity of ’Fabula’ potato variety grown at the UF/IFAS Hastings Agricultural Extension Center, Hastings, FL from 2001 to 2015, excluding 2009.

Year

Total Yield

Marketable Yield1

% of STD

Standard

Size Class (Distribution by class %)2

Range %

Specific Gravity

C

B

A1

A2

A3

A4

A1 to A3

Culls

2001

242

219

72

LaChipper

0

3

31

44

23

0

97

6

1.053

2002

311

245

108

LaChipper

0

2

36

47

15

0

98

19

1.059

2003

486

417

132

LaChipper

2

3

32

37

27

0

96

11

1.056

2004

529

472

223

LaChipper

3

3

50

38

6

0

94

5

1.063

2005

361

323

129

LaChipper

1

5

59

31

4

0

94

5

1.054

2006

324

269

88

LaChipper

0

7

77

15

0

0

92

10

1.053

2007

408

381

128

LaChipper

0

6

70

22

2

0

94

1

1.052

2008

339

286

150

LaChipper

1

11

73

15

1

0

88

4

1.060

2010

244

153

82

LaChipper

2

14

83

1

0

0

84

25

1.047

2011

373

314

111

LaChipper

1

7

53

29

10

0

92

8

1.050

2012

216

149

61

LaChipper

2

9

53

24

12

0

89

27

1.044

2013

136

106

85

LaChipper

2

9

77

11

0

0

89

13

1.044

2014

324

183

126

LaChipper

3

18

71

7

1

0

79

30

1.053

2015

235

197

59

LaChipper

3

8

59

30

0

0

89

6

1.039

Average

323

265

111

 

1

8

59

25

7

0

91

12

1.052

1 Marketable yield: Sum of size classes A1 to A3.

2 Size classes: C = 0.5 to 1.5 inches, B = 1.5 to 1.86 inches, A1 = 1.86 to 2.5 inches, A2 = 2.5 to 3.25 inches, A3 = 3.25 to 4 inches, A4 >4 inches; Size distribution by class: Class (wt)/(Total Yield [wt] – culls [wt])

Table 3. 

Vine maturity, tuber characteristics, and internal tuber defects of ‘Fabula’ potato variety grown at the UF/IFAS Hastings Agricultural Extension Center, Hastings, FL from 2001 to 2015, excluding 2009.

Year

Vine Maturity

Tuber Characteristics1

Internal Tuber Defects2

Internal Flesh Color

Skin Color

Skin Texture

Tuber Shape

Eye Depth

Overall Appearance

HH

BR

CRS

IHN

2001

4

2

8

7

3

5

4

0

0

0

0

2002

4

3

7

7

4

7

5

0

0

0

0

2003

6

3

7

7

4

7

7

0

0

0

0

2004

7

3

7

8

5

8

8

0

0

0

0

2005

8

3

7

6

5

7

6

0

0

0

0

2006

9

2

7

6

4

6

6

0

0

0

0

2007

9

4

7

6

3

7

6

0

0

0

0

2008

7

2

7

6

3

7

6

0

0

0

0

2010

8

3

8

7

4

5

6

0

0

0

0

2011

8

3

7

7

4

3

6

0

0

0

0

2012

9

2

7

7

3

4

5

0

0

0

0

2013

8

3

7

6

4

3

5

0

0

3

0

2014

3

2

9

7

3

5

7

0

0

3

0

2015

5

*

*

*

*

*

6

0

0

0

0

Average

7

3

7

7

4

5

6

0

0

0

0

1 See rating system outlined in Florida Rating Code Table (Table 1).

2 Percent tuber defects. HH = hollow heart, BR = brown rot, CRS = corky ring spot, IHN = internal heat necrosis.

*Missing data

Footnotes

1.

This document is HS1294, one of a series of the Horticultural Sciences Department, UF/IFAS Extension. Original publication date May 2017. Visit the EDIS website at http://edis.ifas.ufl.edu.

2.

Rodrick Z. Mwatuwa, research assistant; Christian T. Christensen, postdoctoral research associate; Pam Solano, biological scientist; and Lincoln Zotarelli, assistant professor; Horticultural Sciences Department, UF/IFAS Extension, Gainesville, FL 32611.


The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other UF/IFAS Extension publications, contact your county's UF/IFAS Extension office.

U.S. Department of Agriculture, UF/IFAS Extension Service, University of Florida, IFAS, Florida A & M University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Nick T. Place, dean for UF/IFAS Extension.