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Table 1 Effect of genotype and temperature on four germination traits

From: Genetic control of Eucalyptus globulus seed germination

 

Proportion

Rate

 

Germ/Sown

Normals/Germ

T50Germ

T50Normals

Fixed effects

Num d.f.

Den d.f.

F

P

F

P

F

P

F

P

Between races

 Cambridge 2007/08

  Temperature

2

28

30.0

<0.001

78.8

<0.001

67.9

<0.001

81.2

<0.0001

  Race

2

14

1.5

0.268

2.4

0.124

2.9

0.088

4.4

0.034

  Race × temperature

4

28

2.9

0.041

1.1

0.394

2.3

0.082

3.2

0.028

 Cambridge 2008/09

  Temperature

2

26

15.6

<0.001

67.0

<0.001

98.9

<0.001

137.8

<0.001

  Race

2

13

1.9

0.183

4.3

0.015

3.6

0.059

3.8

0.051

  Race × temperature

4

26

2.1

0.113

1.2

0.182

2.1

0.108

1.9

0.136

Within races (random effects)

 Cambridge 2007/08

  

ChiSq

P

ChiSq

P

ChiSq

P

ChiSq

P

  Genotype (race)

14

35

2.3

0.064

0.0

1.000

21.1

<0.001

14.1

<0.001

  Temperature × genotype (race)

28

56–57

93.9

<0.001

42.4

<0.001

0.4

0.258

0.8

0.192

 Cambridge 2008/09

  Genotype (race)

13

29

10.5

<0.001

0.1

1.000

33.8

<0.001

28.0

<0.001

  Temperature × genotype (race)

26

56–57

37.1

<0.001

40.5

<0.001

0.1

0.365

0.0

1.000

  1. Analyses were undertaken on seeds collected from E. globulus genotypes growing in a grafted seed orchard at Cambridge, Tasmania. Seeds were from capsules collected in 2007/08 and 2008/09 from the previous flowering year. Genetic effects and their temperature interactions are shown at the race and genotype within race levels. The response traits are the germination proportion (Germ/Sown), the proportion of germinated seeds that developed into normal seedlings (Normals/Germ), germination rate (T50Germ) and the rate of normal seedling development (T50Normals)
  2. F Walds F value, P probability, Num d.f. numerator degrees of freedom, Den d.f. denominator degrees of freedom
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Annals of Forest Science

ISSN: 1297-966X