Table 3 Mean, range of variation, standard deviation (SD), coefficient of variation (CV) and heritability (h² _B) in the whole collection and in the durum sub-population evaluated for yellow index (b*) and yellow pigment content (μg/g) in six and two environments, respectively

Foggia 2009

12.8

(9.2–17.1)

1.3

3.45

0.89

13.3

(10.5–17.1)

1.1

3.30

0.86

Foggia 2012

13.8

(9.6–19.0)

1.6

3.87

0.90

14.6

(10.0–19.0)

1.5

3.40

0.9

Valenzano 2010

14.6

(11.4–18.5)

1.5

2.93

0.93

15.3

(11.6–18.5)

1.2

2.98

0.88

Valenzano 2012

14.3

(8.9–18.8)

1.6

3.32

0.89

15.0

(11.8–18.8)

1.2

3.10

0.86

Valenzano 2013

14.2

(9.2–18.4)

1.7

2.91

0.94

15.2

(11.9–18.4)

1.4

2.85

0.91

Valenzano 2014

13.4

(9.3–17.6)

1.6

3.46

0.92

14.3

(11.2–17.6)

1.3

3.40

0.87

Mean

13.8

(9.1–17.8)

1.5

3.32

14.6

(11.6–17.8)

1.2

3.17

Foggia 2008

6.3

(3.2–11.7)

1.7

8.47

0.91

7.1

(3.8–11.7)

1.6

7.73

0.89

Valenzano 2009

5.8

(2.4–12.6)

1.8

7.19

0.95

6.7

(2.8–12.6)

1.8

6.78

0.93

Mean

6.0

(3.1–12.2)

1.8

7.83

6.9

(3.2–12.2)

1.6

7.26