Species complex diversification by host plant use in an herbivorous insect: The source of Puerto Rican cactus mealybug pest and implications for biological control

Poveda-Martínez, Daniel; Aguirre, María Belén; Logarzo, Guillermo A.; Hight, Stephen D.; Triapitsyn, Serguei V.; Diaz-Sotero, Hilda; Vitorino, M. D.; Hasson, Esteban

doi:10.1002/ece3.6702

Cited by 15 publications

(26 citation statements)

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“…Closely related species of herbivorous insects with overlapping distribution ranges can be considered good candidates of ecological speciation by means of divergent selection (Nosil, 2012). In this context, the roles of mating timing (Santos et al, 2007), endosymbiotic infections (Frati et al, 2004), and host plant associations (Poveda-Martinez et al, 2020;Prowell, McMichael, & Silvain, 2004) have been reported and referred to as processes shaping the fate of co-occurring species. Other processes, such as introgression following interspecific hybridization, may also play an important role in young sympatric species (Martin et al, 2013;Tonzo, Papadopoulou, & Ortego, 2020;Valencia-Montoya et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Spatial and host related genomic variation in partially sympatric cactophagous moth species

Poveda-Martínez

Varone

Corona

et al. 2021

Preprint

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Surveys of patterns of genetic variation in natural sympatric and allopatric populations of recently diverged species are necessary to understand the processes driving intra and interspecific diversification. The South American moths Cactoblastis cactorum, Cactoblastis doddi and Cactoblastis bucyrus are specialized in the use of cacti as host plants. These species have different distribution ranges and differ in patterns of host plant use. However, there are areas in which their ranges overlap, as in northwestern Argentina, where they are largely sympatric. Using a combination of genome-wide SNPs and mitochondrial data we investigated the phylogeographic patterns of these cactophilic moths and searched for footprints of hybridization. Additionally, we evaluated a moth population feeding on Cleistocactus baumannii, a plant never reported as a host for the genus. We identified three well delimited species and detected signs of historical gene flow. Our survey also revealed intraspecific geographic structure in both C. doddi and C. cactorum and showed that the moth population feeding on C. baumannii may be considered as conspecific to C. bucyrus. Overall, our results indicated historical events of genetic interchange occurred in Cactoblastis cactophagous moths, but host plants likely played an important role during divergence limiting gene flow across species.

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Section: Introductionmentioning

confidence: 99%

Spatial and host related genomic variation in partially sympatric cactophagous moth species

Poveda-Martínez

Varone

Corona

et al. 2021

Preprint

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“…atacamensis , or vice versa, was an important driver of genetic divergence between populations. However, these sampling sites are separated by ~500 km, suggesting that isolation by distance may also have played a role in differentiation (Forbes et al, 2017; Hood et al, 2020; Poveda‐Martínez et al, 2019, 2020). Indeed, correlation and multiple regression analyses stressed the roles of both host plants and geographic distance as drivers of genetic divergence within C .…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, the study of population genetic structure patterns in sympatric and allopatric populations of recently diverged species can provide information on the processes that drive diversification at the intraand interspecific levels and the mechanisms maintaining species boundaries.Closely related species of herbivorous insects with currently overlapping distributions could have arisen via ecological speciation through divergent selection (Nosil, 2012) or in allopatry followed by secondary contact. In the case of ecological speciation, the roles of mating timing (Santos et al, 2007), endosymbiotic infections (Frati et al, 2004), and host plant associations (Prowell et al, 2004;Poveda-Martínez et al, 2020) have been reported as processes shaping the fate of co-occurring species. In contrast, allopatric speciation, a common mode of speciation, does not necessarily imply divergent selection, unlike sympatric speciation.…”

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confidence: 99%

Spatial and host related genomic variation in partially sympatric cactophagous moth species

et al. 2021

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Surveys of patterns of genetic variation in natural sympatric and allopatric populations of recently diverged species are necessary to understand the processes driving intra‐ and interspecific diversification. The South American moths Cactoblastis cactorum, Cactoblastis doddi and Cactoblastis bucyrus are specialized in the use of cacti as host plants. These species have partially different geographic ranges and differ in patterns of host plant use. However, there are areas that overlap, particularly, in northwestern Argentina, where they are sympatric. Using a combination of genome‐wide SNPs and mitochondrial data we assessed intra and interspecific genetic variation and investigated the relative roles of geography and host plants on genetic divergence. We also searched for genetic footprints of hybridization between species. We identified three well delimited species and detected signs of hybridization in the area of sympatry. Our results supported a hypothetical scenario of allopatric speciation in the generalist C. cactorum and genetic interchange during secondary geographic contact with the pair of specialists C. bucyrus and C. doddi that probably speciated sympatrically. In both cases, adaptation to new host plants probably played an important role in speciation. The results also suggested the interplay of geography and host plant use as drivers of divergence and limiting gene flow at intra and interspecific levels.

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“…We particularly analyzed the intrinsic interactions (adult-larva and larva-larva) of Anagyrus cachamai Triapitsyn, Logarzo & Aguirre and A. lapachosus Triapitsyn, Aguirre & Logarzo (Hymenoptera: Encyrtidae), candidate agents for the neoclassical biological control of the Harrisia cactus mealybug Hypogeococcus sp. (Hemiptera: Pseudococcidae), a Brazilian native turned invasive pest of the native cacti in Puerto Rico 27 – 29 . With the information obtained, we predicted if both parasitoid species should be released and the level of their potential impact on the target pest.…”

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confidence: 99%

Influence of competition and intraguild predation between two candidate biocontrol parasitoids on their potential impact against Harrisia cactus mealybug, Hypogeococcus sp. (Hemiptera: Pseudococcidae)

Aguirre

Bruzzone

Triapitsyn

et al. 2021

Sci Rep

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When two or more parasitoid species, particularly candidates for biocontrol, share the same target in the same temporal window, a complex of behaviors can occur among them. We studied the type of interactions (competition and intraguild predation) that existed between the nymphal parasitoids Anagyrus cachamai and A. lapachosus (Hymenoptera: Encyrtidae), two candidate neoclassical biocontrol agents against the Puerto Rican cactus pest mealybug, Hypogeococcus sp. (Hemiptera: Pseudococcidae). The surrogate native congener host in Argentina, the cactus mealybug Hypogeococcus sp., was studied to predict which species should be released; in the case that both should be released, in which order, and their potential impact on host suppression. In the laboratory we conducted experiments where different densities of the host mealybug were exposed to naive females of A. cachamai and A. lapachosus sequentially in both directions. Experiments were analyzed by combining a series of competitive behavioral and functional response models. A fully Bayesian approach was used to select the best explaining models and calculate their parameters. Intraguild predation existed between A. cachamai, the species that had the greatest ability to exploit the resource, and A. lapachosus, the strongest species in the interference competition. The role that intraguild predation played in suppression of Hypogeococcus sp. indicated that a multiple release strategy for the two biocontrol agents would produce better control than a single release; as for the release order, A. lapachosus should be released first.

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Species complex diversification by host plant use in an herbivorous insect: The source of Puerto Rican cactus mealybug pest and implications for biological control

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 15 publications

References 89 publications

Spatial and host related genomic variation in partially sympatric cactophagous moth species

Spatial and host related genomic variation in partially sympatric cactophagous moth species

Spatial and host related genomic variation in partially sympatric cactophagous moth species

Influence of competition and intraguild predation between two candidate biocontrol parasitoids on their potential impact against Harrisia cactus mealybug, Hypogeococcus sp. (Hemiptera: Pseudococcidae)

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