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Table 5 Phenotypic variation in J. curcas among accessions

From: High level of molecular and phenotypic biodiversity in Jatropha curcasfrom Central America compared to Africa, Asia and South America

Trait

Mean

Min.

Max.

SDg

CVg%

h2(%)

Average seed weight (g seed−1)

0.66

0.44

0.89

0.089

13

n.d.

Cotyledon number (#)

2.02

2

3

0.009

0.4

1.4

Days to cotyledon emergence (d)

18.2

14.5

28.0

2.1

12

88.3

Days to germination (d)

14.8

11.0

22.0

1.7

12

74.8

Plant height (cm)

21.3

7.5

33.4

3.5

17

85.7

Leaf number (#)

12.0

7.0

17

0.8

7

48.0

Phyllochron in days per leaf (d)

5.1

2.7

8.3

0.44

9

64.3

First-leaf length (cm)

12.6

7.2

20.3

1.6

13

81.9

First-leaf width (cm)

11.9

7.2

19.8

1.9

16

83.4

Leaf area average (cm2 leaf−1)

173

112

327

35

20

87.8

Root dry weight (g plant−1)

1.3

0.4

2.5

0.29

23

70.0

Petiole dry weight (g plant−1 ) ns

1.9

0.8

3.0

0.20

10

39.2

Stem dry weight (g plant−1)

6.6

2.2

12.5

1.39

21

71.2

Leaf dry weight (g plant−1)

6.4

3.2

10.4

0.87

14

59.2

Total plant dry weight (g plant−1)

16.1

7.5

27.6

2.7

17

66.4

Total leaf area (cm2 plant−1)

2044

1044

3158

303

15

75.5

Absolute growth rate (g d−1)

0.27

0.13

0.47

0.046

17

67.5

Relative Growth Rate, RGR (d−1)

0.053

0.040

0.060

0.002

4

47.4

Leaf Weight Ratio, LWR (%)

40.1

34

55

2.0

5

62.8

Specific Leaf Area, SLA (cm2 g−1)

324

220

416

22

7

64.7

Net Assimilation Rate, NAR (g m2 d−1)

4.2

2.4

5.9

0.4

9

48.4

Radiation use efficiency (g MJint−1)

5.0

2.4

8.0

0.67

13

57.3

Shoot/root ratio (−)

12.5

8.0

24.4

1.8

14

73.7

Leaves/stem ratio (−)

1.3

1.0

2.4

0.14

11

69.6

Petiole/leaf weight ratio (−)

0.30

0.16

0.38

0.031

10

78.8

  1. No significant difference between accessions for petiole dry weights (ns).
  2. RGR, RUE and NAR differences statistically significant at p < 0.05.
  3. Difference for all other traits statistically significant at p < 0.01.
  4. Note: RGR = LWR*SLA*NAR (when SLA in m2 g−1 and NAR in g m2 d−1 and LWR expressed as a fraction).
  5. Means over all accessions, minimum, maximum values of accession means, genetic standard deviation (SDg) and genetic coefficient of variation (CVg% = 100*SDg/mean), broad sense heritability (h2, for family means based on three plants per family).