Assortative mating between two sympatric closely-related specialists: inferred from molecular phylogenetic analysis and behavioral data.

Abstract excerpt

Host plant shifting of phytophagous insects can lead to the formation of host associated differentiation and ultimately speciation. In some cases, host plant specificity alone acts as a nearly complete pre-mating isolating barrier among insect populations. We here test whether effective pre-mating isolation and host-independent behavioral isolation have evolved under the condition of extreme host specilization...

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