Testing host‐associated differentiation in a quasi‐endophage and a parthenogen on native trees

Dickey, Aaron M.; Medina, Raúl F.

doi:10.1111/j.1420-9101.2010.01962.x

Cited by 30 publications

(61 citation statements)

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“…1999; Vialatte et al. 2005), yellow pecan aphids (Dickey and Medina 2010), western flower thrips (Brunner et al. 2004; Brunner and Frey 2010), and eriophyid mites (Evans et al.…”

Section: Discussionmentioning

confidence: 99%

“…Much of what we know about HAD involves insect species with narrow host ranges (i.e., specialists) that spend part or all their life cycle inside their hosts, and/or reproduce asexually (e.g., parthenogenetically) (Pashley 1986; Van Zandt and Mopper 1998; Brunner et al. 2004; Dickey and Medina 2010, 2012; Cook et al. 2012; Darwell et al.…”

Section: Introductionmentioning

confidence: 99%

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Host‐associated differentiation in a highly polyphagous, sexually reproducing insect herbivore

Antwi

Sword

Medina

2015

Ecology and Evolution

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Insect herbivores may undergo genetic divergence on their host plants through host-associated differentiation (HAD). Much of what we know about HAD involves insect species with narrow host ranges (i.e., specialists) that spend part or all their life cycle inside their hosts, and/or reproduce asexually (e.g., parthenogenetic insects), all of which are thought to facilitate HAD. However, sexually reproducing polyphagous insects can also exhibit HAD. Few sexually reproducing insects have been tested for HAD, and when they have insects from only a handful of potential host-plant populations have been tested, making it difficult to predict how common HAD is when one considers the entire species’ host range. This question is particularly relevant when considering insect pests, as host-associated populations may differ in traits relevant to their control. Here, we tested for HAD in a cotton (Gossypium hirsutum) pest, the cotton fleahopper (CFH) (Pseudatomoscelis seriatus), a sexually reproducing, highly polyphagous hemipteran insect. A previous study detected one incidence of HAD among three of its host plants. We used Amplified fragment length polymorphism (AFLP) markers to assess HAD in CFH collected from an expanded array of 13 host-plant species belonging to seven families. Overall, four genetically distinct populations were found. One genetically distinct genotype was exclusively associated with one of the host-plant species while the other three were observed across more than one host-plant species. The relatively low degree of HAD in CFH compared to the pea aphid, another hemipteran insect, stresses the likely importance of sexual recombination as a factor increasing the likelihood of HAD.

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“…1999; Vialatte et al. 2005), yellow pecan aphids (Dickey and Medina 2010), western flower thrips (Brunner et al. 2004; Brunner and Frey 2010), and eriophyid mites (Evans et al.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Host‐associated differentiation in a highly polyphagous, sexually reproducing insect herbivore

Antwi

Sword

Medina

2015

Ecology and Evolution

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“…Populations in distinct habitats, such as different host plants, may diverge genetically even if they remain in contact, a process called ecological speciation (Nosil, 2012; Schluter, 2001). Along with oviposition preference and performance characters, life‐history parameters such as generation time (e.g., voltinism), parthenogenesis, and variation in diapause contribute to the divergence of host plant‐associated populations of insects (Craig et al., 1993; Dickey & Medina, 2010; Diehl & Bush, 1984; Wood et al., 1999). Studies have demonstrated host‐associated differentiation (HAD) for insects on native plants (Abrahamson et al., 2003; Dickey & Medina, 2010; Scheffer & Hawthorne, 2007; Stireman, Nason, & Heard, 2005) as well as for those on novel host plants (Feder, Hunt, & Bush, 1993; Forbes et al., 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Along with oviposition preference and performance characters, life‐history parameters such as generation time (e.g., voltinism), parthenogenesis, and variation in diapause contribute to the divergence of host plant‐associated populations of insects (Craig et al., 1993; Dickey & Medina, 2010; Diehl & Bush, 1984; Wood et al., 1999). Studies have demonstrated host‐associated differentiation (HAD) for insects on native plants (Abrahamson et al., 2003; Dickey & Medina, 2010; Scheffer & Hawthorne, 2007; Stireman, Nason, & Heard, 2005) as well as for those on novel host plants (Feder, Hunt, & Bush, 1993; Forbes et al., 2009). Natural enemies of herbivores such as parasitoids may undergo cascading or sequential genetic divergence as they follow herbivores onto novel host plants (Stireman et al., 2005; Forbes et al., 2009), or herbivores may escape parasitism on their newly colonized host plants.…”

Section: Introductionmentioning

confidence: 99%

Host‐plant associated genetic divergence of two Diatraea spp. (Lepidoptera: Crambidae) stemborers on novel crop plants

Joyce

Chicas

Cervantes

et al. 2016

Ecology and Evolution

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Diatraea lineolata and Diatraea saccharalis (Lepidoptera: Crambidae) are moths with stemboring larvae that feed and develop on economically important grasses. This study investigated whether these moths have diverged from a native host plant, corn, onto introduced crop plants including sorghum, sugarcane, and rice. Diatraea larvae were collected from these four host plants throughout the year in El Salvador and were reared on artificial diet until moths or parasitoids emerged. Adult moths were subsequently identified to species. Amplified fragment length polymorphisms (AFLPs) and mitochondrial DNA cytochrome oxidase I (COI) were used to examine whether or not there was genetic divergence of D. lineolata or D. saccharalis populations on the four host plants. Percent parasitism was also determined for each moth on its host plants. D. lineolata was collected from corn in the rainy season and sorghum in the dry season. D. saccharalis was most abundant on sugarcane in the rainy season and sorghum in the dry season. The AFLP analysis found two genetically divergent populations of both D. lineolata and D. saccharalis. Both moths had high levels of parasitism on their dominant host plant in the rainy season, yet had low levels of parasitism on sorghum in the dry season. The presence of two genotypes of both Diatraea spp. on sorghum suggest that host‐associated differentiation is occurring on this novel introduced crop plant.

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“…But this owed to a lack of consensus on the meaning of that term rather than to a conscious effort to indicate uncertainty. In recent years, workers have begun writing about "hostassociated differentiation (HAD)," a more general and somewhat variably applied term recently defined by Dickey and Medina [34] as, "the formation of genetically divergent host-associated sub-populations." However, this term is not broad enough to span all kinds of biological variation and describes the relationship between populations rather than the populations themselves.…”

Section: "Host Form": a Missing Term In The Vocabulary Of Biological mentioning

confidence: 99%

Of “Host Forms” and Host Races: Terminological Issues in Ecological Speciation

Funk

2012

International Journal of Ecology

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Successful communication and accurate inferences in science depend on the common understanding and consistent usage of the terms we apply to concepts of interest. Likewise, new terminology is required when important concepts have gone unnamed. Here, I focus on terminological issues about biological variation and ecological speciation, especially in herbivorous insects but also more generally. I call for the more restricted use of concepts that have sometimes been misapplied, and thus caution against synonymizing ecological speciation with sympatric speciation and the unwarranted invocation of "host races" to describe herbivorous insect differentiation. I also call for the qualified application of terms for different kinds of biological variation and for host range when confronting uncertainty. Among other "missing terms" introduced here is "host form," a generic term describing any case of host-associated differences for which current evidence does not allow diagnosis of the specific kind of variation. Embracing the use of host form should free host race from its current overapplication. Finally, I present a case study in which Neochlamisus leaf beetle populations previously described as host forms are hereby declared to be host races, based on accumulated evidence supporting each of the associated criteria.

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Testing host‐associated differentiation in a quasi‐endophage and a parthenogen on native trees

Cited by 30 publications

References 96 publications

Host‐associated differentiation in a highly polyphagous, sexually reproducing insect herbivore

Host‐associated differentiation in a highly polyphagous, sexually reproducing insect herbivore

Host‐plant associated genetic divergence of two Diatraea spp. (Lepidoptera: Crambidae) stemborers on novel crop plants

Of “Host Forms” and Host Races: Terminological Issues in Ecological Speciation

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