Ecological Archives E085-099-A2

Andrew G. Stephenson, Bradley Leyshon, Steven E. Travers, C. Nelson Hayes, and James A. Winsor. 2004. Interrelationships among inbreeding, herbivory, and pathogen infection on reproduction in Cucurbita pepo ssp. texana. Ecology 85:3023–3034.

Appendix B. Effects of spray treatment, plant family, and inbreeding on reproductive performance.

 

N

Family

Cross

Treatment

Family × Cross

Family × Trt

Cross × Trt

Three-way interaction

Staminate flowers (× 3.5)

263

1.0

12.9***

17.0***

0.4

0.5

3.2

0.7

Pollen/flower (× 30)

225

1.2

1.0

2.5

1.7

0.5

2.3

2.9*

Pollen diameter

225

0.7

11.0**

0.2

1.2

0.6

0.1

1.3

Pollen tube growth

100

1.2

119.3***

8.4**

1.5

1.0

1.1

1.7

Pistillate flowers (× 3.5)

263

1.8

13.7***

19.2***

2.6*

0.4

4.3*

0.3

Fruits/plant

263

14.5***

4.9*

26.5***

11.7***

0.3

7.4**

0.2

Seeds/fruit

236

6.3***

5.7*

0

2.0

0.1

0

0.4

Mass/seed (mg)

234

2.8*

6.7**

0.1

0.3

0.4

0.3

0.7

Fruit volume (mL)

258

0.8

28.7***

4.0*

6.5***

0.4

0.1

0.5

Male reproductive output

224

0.9

4.4*

13.9***

0.7

0.5

5.1*

1.2

Female reprod.output

230

13.5***

8.4**

20.8***

4.5**

1.2

3.2

0.1

Total reproductive output

180

7.1***

7.4**

13.1***

2.6*

0.9

2.6

0.4

   Notes: F values from mixed effects model analyses of variance for the effects of Family (a random factor), Cross (inbred/outbred), Spray Treatment (weekly insecticide spray or no insecticide spray), and the two-way interactions of Family by Cross, Family by Spray Treatment, Cross by Spray Treatment and the three-way interaction on 9 individual and 3 cumulative components of fitness. F values were generated by Type III sums of squares from a general linear model (Proc GLM, SAS Institute, 2002).



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