Table 4 Open in new tab Colour of boiled...

Variety	Colour of flesh	ΔE	L*	a*	b*
Blaue Elise	Purple	7.1	34.9^A ± 2.6	34.0^A ± 1.8	32.9^A ± 1.2	4.1^A ± 1.4	3.9^A ± 0.8	4.3^A ± 1.3	−12.3^A ± 1.6	−12.8^A ± 1.4	−13.9^A ± 1.7
Blaue St Galler	10.4	31.9^A ± 2.9	31.3^A ± 3.3	29.6^A ± 2.1	7.0^A0 ± 2.5	6.9^A ± 1.5	7.1^A ± 2.1	−16.3^A ± 1.5	−16.7^A ± 1.6	−16.9^A ± 1.5
Blue Congo	10.3	37.7^A ± 3.6	36.7^A ± 3.6	35.9^A ± 3.3	8.1^A ± 1.3	8.4^A ± 1.4	8.4^A ± 1.9	−16.7^A ± 1.2	−17.0^AB ± 1.0	−18.4^B ± 1.2
Valfi	9.4	39.3^A ± 4.3	39.5^A ± 4.4	38.0^A ± 5.5	8.7^A ± 1.5	9.3^A ± 2.0	9.0^A ± 1.4	−17.5^A ± 1.4	−18.3^A ± 1.4	−19.3^A ± 1.2
Vitelotte	8.6	41.7^A ± 9.1	36.4^A ± 2.0	35.2^A ± 1.9	14.1^A ± 4.1	16.1^A ± 2.4	15.4^A ± 2.7	−16.9^A ± 3.4	−19.0^A ± 1.4	18.6^A ± 1.6
Average	9.2	37.1	35.6	34.3	8.4	8.9	8.8	−15.9	−16.8	−17.4
Highland Burgundy Red	Red	8.7	53.4^A ± 2.6	54.1^A ± 2.6	53.4^A ± 2.8	11.9^A ± 2.3	12.0^A ± 2.9	13.4^A ± 3.2	−3.7^A ± 0.4	−3.6^A ± 1.0	−4.4^A ± 0.6
Herbie 26	6.0	53.0^A ± 1.4	53.0^A ± 2.0	52.8^A ± 1.8	9.9^A ± 1.7	10.6^A ± 1.8	11.2^A ± 2.3	−5.6^A ± 0.3	−5.9^A ± 0.4	−5.9^A ± 0.4
Rosalinde	17.9	62.0^A ± 3.5	61.8^A ± 4.1	59.8^A ± 3.1	6.7^A ± 1.6	7.0^A ± 1.7	8.0^A ± 1.0	−3.3^A ± 1.7	−3.8^A ± 1.9	−3.3^A ± 1.2
Rote Emma	8.0	51.0^A ± 1.3	52.3^A ± 1.8	52.0^A ± 0.8	10.8^A ± 1.1	11.0^A ± 1.3	11.4^A ± 0.9	−4.9^A ± 0.8	−5.2^A ± 0.9	−5.3^A ± 0.6
Average	10.1	54.8	55.3 ±	54.5	9.8a	10.1	11.0	−4.4 ±	4.6	−4.7

Variety

Colour of flesh

ΔE

Hour

Blaue Elise

Purple

7.1

34.9^A ± 2.6

34.0^A ± 1.8

32.9^A ± 1.2

4.1^A ± 1.4

3.9^A ± 0.8

4.3^A ± 1.3

−12.3^A ± 1.6

−12.8^A ± 1.4

−13.9^A ± 1.7

Blaue St Galler

10.4

31.9^A ± 2.9

31.3^A ± 3.3

29.6^A ± 2.1

7.0^A0 ± 2.5

6.9^A ± 1.5

7.1^A ± 2.1

−16.3^A ± 1.5

−16.7^A ± 1.6

−16.9^A ± 1.5

Blue Congo

10.3

37.7^A ± 3.6

36.7^A ± 3.6

35.9^A ± 3.3

8.1^A ± 1.3

8.4^A ± 1.4

8.4^A ± 1.9

−16.7^A ± 1.2

−17.0^AB ± 1.0

−18.4^B ± 1.2

Valfi

9.4

39.3^A ± 4.3

39.5^A ± 4.4

38.0^A ± 5.5

8.7^A ± 1.5

9.3^A ± 2.0

9.0^A ± 1.4

−17.5^A ± 1.4

−18.3^A ± 1.4

−19.3^A ± 1.2

Vitelotte

8.6

41.7^A ± 9.1

36.4^A ± 2.0

35.2^A ± 1.9

14.1^A ± 4.1

16.1^A ± 2.4

15.4^A ± 2.7

−16.9^A ± 3.4

−19.0^A ± 1.4

18.6^A ± 1.6

Average

9.2

37.1

35.6

34.3

8.4

8.9

8.8

−15.9

−16.8

−17.4

Highland Burgundy Red

Red

8.7

53.4^A ± 2.6

54.1^A ± 2.6

53.4^A ± 2.8

11.9^A ± 2.3

12.0^A ± 2.9

13.4^A ± 3.2

−3.7^A ± 0.4

−3.6^A ± 1.0

−4.4^A ± 0.6

Herbie 26

6.0

53.0^A ± 1.4

53.0^A ± 2.0

52.8^A ± 1.8

9.9^A ± 1.7

10.6^A ± 1.8

11.2^A ± 2.3

−5.6^A ± 0.3

−5.9^A ± 0.4

Rosalinde

17.9

62.0^A ± 3.5

61.8^A ± 4.1

59.8^A ± 3.1

6.7^A ± 1.6

7.0^A ± 1.7

8.0^A ± 1.0

−3.3^A ± 1.7

−3.8^A ± 1.9

−3.3^A ± 1.2

Rote Emma

8.0

51.0^A ± 1.3

52.3^A ± 1.8

52.0^A ± 0.8

10.8^A ± 1.1

11.0^A ± 1.3

11.4^A ± 0.9

−4.9^A ± 0.8

−5.2^A ± 0.9

−5.3^A ± 0.6

Average

10.1

54.8

55.3 ±

54.5

9.8a

10.1

11.0

−4.4 ±

4.6

−4.7

Variety	Colour of flesh	ΔE	L*	a*	b*
Blaue Elise	Purple	7.1	34.9^A ± 2.6	34.0^A ± 1.8	32.9^A ± 1.2	4.1^A ± 1.4	3.9^A ± 0.8	4.3^A ± 1.3	−12.3^A ± 1.6	−12.8^A ± 1.4	−13.9^A ± 1.7
Blaue St Galler	10.4	31.9^A ± 2.9	31.3^A ± 3.3	29.6^A ± 2.1	7.0^A0 ± 2.5	6.9^A ± 1.5	7.1^A ± 2.1	−16.3^A ± 1.5	−16.7^A ± 1.6	−16.9^A ± 1.5
Blue Congo	10.3	37.7^A ± 3.6	36.7^A ± 3.6	35.9^A ± 3.3	8.1^A ± 1.3	8.4^A ± 1.4	8.4^A ± 1.9	−16.7^A ± 1.2	−17.0^AB ± 1.0	−18.4^B ± 1.2
Valfi	9.4	39.3^A ± 4.3	39.5^A ± 4.4	38.0^A ± 5.5	8.7^A ± 1.5	9.3^A ± 2.0	9.0^A ± 1.4	−17.5^A ± 1.4	−18.3^A ± 1.4	−19.3^A ± 1.2
Vitelotte	8.6	41.7^A ± 9.1	36.4^A ± 2.0	35.2^A ± 1.9	14.1^A ± 4.1	16.1^A ± 2.4	15.4^A ± 2.7	−16.9^A ± 3.4	−19.0^A ± 1.4	18.6^A ± 1.6
Average	9.2	37.1	35.6	34.3	8.4	8.9	8.8	−15.9	−16.8	−17.4
Highland Burgundy Red	Red	8.7	53.4^A ± 2.6	54.1^A ± 2.6	53.4^A ± 2.8	11.9^A ± 2.3	12.0^A ± 2.9	13.4^A ± 3.2	−3.7^A ± 0.4	−3.6^A ± 1.0	−4.4^A ± 0.6
Herbie 26	6.0	53.0^A ± 1.4	53.0^A ± 2.0	52.8^A ± 1.8	9.9^A ± 1.7	10.6^A ± 1.8	11.2^A ± 2.3	−5.6^A ± 0.3	−5.9^A ± 0.4	−5.9^A ± 0.4
Rosalinde	17.9	62.0^A ± 3.5	61.8^A ± 4.1	59.8^A ± 3.1	6.7^A ± 1.6	7.0^A ± 1.7	8.0^A ± 1.0	−3.3^A ± 1.7	−3.8^A ± 1.9	−3.3^A ± 1.2
Rote Emma	8.0	51.0^A ± 1.3	52.3^A ± 1.8	52.0^A ± 0.8	10.8^A ± 1.1	11.0^A ± 1.3	11.4^A ± 0.9	−4.9^A ± 0.8	−5.2^A ± 0.9	−5.3^A ± 0.6
Average	10.1	54.8	55.3 ±	54.5	9.8a	10.1	11.0	−4.4 ±	4.6	−4.7

Table 4

Open in new tab

Colour of boiled potatoes directly after cutting and after 1 and 4 h

Variety	Colour of flesh	ΔE	L*			a*			b*
			0	1	4	0	1	4	0	1	4
			Hour			Hour			Hour
Blaue Elise	Purple	7.1	34.9^A ± 2.6	34.0^A ± 1.8	32.9^A ± 1.2	4.1^A ± 1.4	3.9^A ± 0.8	4.3^A ± 1.3	−12.3^A ± 1.6	−12.8^A ± 1.4	−13.9^A ± 1.7
Blaue St Galler		10.4	31.9^A ± 2.9	31.3^A ± 3.3	29.6^A ± 2.1	7.0^A0 ± 2.5	6.9^A ± 1.5	7.1^A ± 2.1	−16.3^A ± 1.5	−16.7^A ± 1.6	−16.9^A ± 1.5
Blue Congo		10.3	37.7^A ± 3.6	36.7^A ± 3.6	35.9^A ± 3.3	8.1^A ± 1.3	8.4^A ± 1.4	8.4^A ± 1.9	−16.7^A ± 1.2	−17.0^AB ± 1.0	−18.4^B ± 1.2
Valfi		9.4	39.3^A ± 4.3	39.5^A ± 4.4	38.0^A ± 5.5	8.7^A ± 1.5	9.3^A ± 2.0	9.0^A ± 1.4	−17.5^A ± 1.4	−18.3^A ± 1.4	−19.3^A ± 1.2
Vitelotte		8.6	41.7^A ± 9.1	36.4^A ± 2.0	35.2^A ± 1.9	14.1^A ± 4.1	16.1^A ± 2.4	15.4^A ± 2.7	−16.9^A ± 3.4	−19.0^A ± 1.4	18.6^A ± 1.6
Average		9.2	37.1	35.6	34.3	8.4	8.9	8.8	−15.9	−16.8	−17.4
Highland Burgundy Red	Red	8.7	53.4^A ± 2.6	54.1^A ± 2.6	53.4^A ± 2.8	11.9^A ± 2.3	12.0^A ± 2.9	13.4^A ± 3.2	−3.7^A ± 0.4	−3.6^A ± 1.0	−4.4^A ± 0.6
Herbie 26		6.0	53.0^A ± 1.4	53.0^A ± 2.0	52.8^A ± 1.8	9.9^A ± 1.7	10.6^A ± 1.8	11.2^A ± 2.3	−5.6^A ± 0.3	−5.9^A ± 0.4	−5.9^A ± 0.4
Rosalinde		17.9	62.0^A ± 3.5	61.8^A ± 4.1	59.8^A ± 3.1	6.7^A ± 1.6	7.0^A ± 1.7	8.0^A ± 1.0	−3.3^A ± 1.7	−3.8^A ± 1.9	−3.3^A ± 1.2
Rote Emma		8.0	51.0^A ± 1.3	52.3^A ± 1.8	52.0^A ± 0.8	10.8^A ± 1.1	11.0^A ± 1.3	11.4^A ± 0.9	−4.9^A ± 0.8	−5.2^A ± 0.9	−5.3^A ± 0.6
Average		10.1	54.8	55.3 ±	54.5	9.8a	10.1	11.0	−4.4 ±	4.6	−4.7

Variety	Colour of flesh	ΔE	L*			a*			b*
			0	1	4	0	1	4	0	1	4
			Hour			Hour			Hour
Blaue Elise	Purple	7.1	34.9^A ± 2.6	34.0^A ± 1.8	32.9^A ± 1.2	4.1^A ± 1.4	3.9^A ± 0.8	4.3^A ± 1.3	−12.3^A ± 1.6	−12.8^A ± 1.4	−13.9^A ± 1.7
Blaue St Galler		10.4	31.9^A ± 2.9	31.3^A ± 3.3	29.6^A ± 2.1	7.0^A0 ± 2.5	6.9^A ± 1.5	7.1^A ± 2.1	−16.3^A ± 1.5	−16.7^A ± 1.6	−16.9^A ± 1.5
Blue Congo		10.3	37.7^A ± 3.6	36.7^A ± 3.6	35.9^A ± 3.3	8.1^A ± 1.3	8.4^A ± 1.4	8.4^A ± 1.9	−16.7^A ± 1.2	−17.0^AB ± 1.0	−18.4^B ± 1.2
Valfi		9.4	39.3^A ± 4.3	39.5^A ± 4.4	38.0^A ± 5.5	8.7^A ± 1.5	9.3^A ± 2.0	9.0^A ± 1.4	−17.5^A ± 1.4	−18.3^A ± 1.4	−19.3^A ± 1.2
Vitelotte		8.6	41.7^A ± 9.1	36.4^A ± 2.0	35.2^A ± 1.9	14.1^A ± 4.1	16.1^A ± 2.4	15.4^A ± 2.7	−16.9^A ± 3.4	−19.0^A ± 1.4	18.6^A ± 1.6
Average		9.2	37.1	35.6	34.3	8.4	8.9	8.8	−15.9	−16.8	−17.4
Highland Burgundy Red	Red	8.7	53.4^A ± 2.6	54.1^A ± 2.6	53.4^A ± 2.8	11.9^A ± 2.3	12.0^A ± 2.9	13.4^A ± 3.2	−3.7^A ± 0.4	−3.6^A ± 1.0	−4.4^A ± 0.6
Herbie 26		6.0	53.0^A ± 1.4	53.0^A ± 2.0	52.8^A ± 1.8	9.9^A ± 1.7	10.6^A ± 1.8	11.2^A ± 2.3	−5.6^A ± 0.3	−5.9^A ± 0.4	−5.9^A ± 0.4
Rosalinde		17.9	62.0^A ± 3.5	61.8^A ± 4.1	59.8^A ± 3.1	6.7^A ± 1.6	7.0^A ± 1.7	8.0^A ± 1.0	−3.3^A ± 1.7	−3.8^A ± 1.9	−3.3^A ± 1.2
Rote Emma		8.0	51.0^A ± 1.3	52.3^A ± 1.8	52.0^A ± 0.8	10.8^A ± 1.1	11.0^A ± 1.3	11.4^A ± 0.9	−4.9^A ± 0.8	−5.2^A ± 0.9	−5.3^A ± 0.6
Average		10.1	54.8	55.3 ±	54.5	9.8a	10.1	11.0	−4.4 ±	4.6	−4.7

Average values (n = 6) labelled with the same letter in the same row are not statistically different (P ≤ 0.05).

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