Table 4. Statistical results about six generalized linear models of the proportions of kdr allele and of kdr homozygote genotypes in the orchard population samples.

Statistical models		Observed data			Statistical test
Dependent variables	Covariables	Orchard origins	N	n	chi2	(df)	P-value
Proportion of kdr allele	Pyrethroid treatments	France	1114	19	0.16	(1)	0.687
	ECOD activity				1.00	(1)	0.317
	Pyrethroid × ECOD				0.92	(1)	0.338
Proportion of kdr allele	Minimal temperature	World	1830	30	5.05	(1)	0.025
Proportion of kdr allele	Freezing days	World	1830	30	4.57	(1)	0.033
Proportion of kdr homozygote	Pyrethroid treatments	France	557	19	0.09	(1)	0.768
	ECOD activity				9.16	(1)	0.003
	Pyrethroid × ECOD				2.63	(1)	0.105
Proportion of kdr homozygote	Minimal temperature	World	915	30	3.13	(1)	0.077
Proportion of kdr homozygote	Freezing days	World	915	30	3.54	(1)	0.060

N and n respectively indicate the number of individuals and the number of orchards observed for each statistical model.