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. Author manuscript; available in PMC: 2013 Feb 1.
Published in final edited form as: New Phytol. 2011 Dec 12;193(3):797–805. doi: 10.1111/j.1469-8137.2011.03988.x

Table 1.

Results of the binomial multiple regression analyzing the relationship between geographical parameters and the frequency of polyploids across 57 Brachypodium distachyon populations in the Iberian Peninsula

Source β ± 1SE df χ2 P
Latitude −0.43 ± 0.2 1,49 9.94 0.0016
Longitude −0.2 ± 0.21 1,49 4.19 0.0406
Elevation −0.002 ± 0.001 1,49 16.77 <0.0001
Latitude × Longitude −0.12 ± 0.1 1,49 6.12 0.0134
Latitude × Elevation −0.0013 ± 0.005 1,49 24.06 <0.0001
Longitude × Elevation −0.0001 ± 0.0005 1,49 15.12 0.0001
Latitude × Longitude × Elevation −0.0003 ± 0.0002 1,49 18.7 <0.0001

Significant values (P < 0.05) are in bold.