Table 1.
Characteristics of samples.
Table 2.
Observed microsatellite multilocus genotypes (MLG): allele size (bp) at each locus and distribution according to the host plant.
Fig 1.
Minimum spanning network of Melanaphis sacchari microsatellite distances computed as the number of allele differences between MLGs.
Each node represents one step in the network, i.e. a distance of one allele. The numbers in the circles refer to the numbers given to MLGs in Table 1.
Fig 2.
Prevalence of the three most frequent MLGs on sorghum (white bars) and sugarcane (grey bars) samples.
Vertical lines represent standard errors of prevalences.
Table 3.
Number of samples hosting at least one individual of each of the 13 MLGs on sugarcane or sorghum samples.
Fig 3.
Laboratory comparison of fitness trade-offs in three MLGs.
Ms11 (circles), Ms15 (squares), or Ms16 (triangles). Host transfer experiments were carried out with four isofemale lineages derived from individuals collected either on sorghum (white symbols) or on sugarcane (grey symbols). The figure represents the mean number of aphids per sugarcane or sorghum plantlet 240 hours after 12 plantlets had each been infested with 10 individuals. The experiment was repeated three times. Vertical lines represent the standard errors of means.
Fig 4.
Illustration of the negative correlation of the performances on sorghum and sugarcane of four isofemale lineages in the laboratory host transfer experiments.
The lineages belong to three MLGs: Ms11 (circles), Ms15 (squares), or Ms16 (triangles). Vertical and horizontal bars represent the standard errors of means.