TABLE 1.

Results of a generalised linear mixed effects model for the transmission rate of different H. defensa isolates to different recipients (37H0, 405H0, and 407H0).

	Effect	LR χ2	df	p-value
Random:	Donor	24.48	1	<0.001
	Batch	4.29	1	0.038
Fixed:	Titre of H. defensa isolate	8.93	1	0.003
	Haplotype of H. defensa isolate	11.18	2	0.003
	Recipient clone	3.52	2	0.172
	Titre: recipient	8.81	2	0.012
	Recipient: haplotype	10.26	4	0.036

Model predictors were recipient, average titre that an isolate reaches in the donor aphid and haplotype of the isolate (haplotypes 1, 2, and 3). The aphid subline acting as donor during horizontal transmission (“donor”) and experimental batch were treated as a random effect. Bold indicates significance (p < 0.05).