Ecological Archives A016-035-A1

Kristin L. Mercer, Ruth G. Shaw, and Donald L. Wyse. 2006. Increased germination of diverse crop–wild hybrid sunflower seeds. Ecological Applications 87:845–854.

Appendix A. Subanalyses of germination, dormancy, and death data from the laboratory to investigate the interactions between seed source and population, and seed source and hybridization. Subanalyses contradict one another in the significance of seed source, and some of the two- and three-way interactions, but both suggest either two- or three-way interactions with seed source. Chi-square table produced from a multinomial regression using maximum likelihood on seed germination, dormancy, and death in the laboratory experiment, 2002.

   
Subanalysis 1
Subanalysis 2
Populations
SD, WY II, ID
WY II, ND, WA
Seed conditions
Late greenhouse and early field
Early field and late field
Source
df
P
df
P
Intercept
2
109.40
<0.0001***
2
136.63
<0.0001*** 
Replication
4
4.22
0.3776 ns 
4
3.97
0.4104 ns  
Population
4
18.90
0.0008***
4
41.96
<0.0001*** 
Hybridization
2
114.99
<0.0001***
2
69.45
<0.0001*** 
Seed source
2
11.08
0.0039** 
2
0.33
0.8486 ns  
Pop × Hybrid
4
0.21
0.9948 ns 
4
27.21
<0.0001*** 
Pop × Source
4
3.69
0.4495 ns 
4
13.79
0.0080**  
Hybrid × Source
2
5.53
0.0630 ~ 
2
13.03
0.0015**  
Pop × Hybrid × Source
4
8.03
0.0904 ~ 
4
5.29
0.2593 ns  

~ 0.05 < P < 0.10; * P < 0.05; ** P < 0.01; *** P < 0.001; ns not significant



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