Implications of Host‐Associated Differentiation in the Control of Pest Species

Medina, Raúl F.

doi:10.1002/9781118295205.ch14

Cited by 22 publications

(45 citation statements)

References 160 publications

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“…It is plausible that the genesis of corn leafhopper genetic structuring revealed by our AFLP data began with the declining intensity of maize agriculture in perennial teosinte habitat beginning 800 YBP (Kelly, ; Benz et al ., ; Laitner‐Benz & Benz, ; Figueroa‐Rangel et al ., , ), and intensified beginning ∼30 years ago when maize agriculture was proscribed at our Las Joyas site following the creation of the Sierra de Manantlán Biosphere Reserve, particularly the Reserve's “core” area containing the Las Joyas site. Establishment of the core area and proscription of maize agriculture plausibly created a buffer zone partially isolating perennial teosinte habitat, so promoting reproductive isolation between the perennial teosinte population and the maize population and resulting in the genetic differentiation observed in Las Joyas (Medina, , ; Forbes et al ., ). Thus, while our AFLP results do not provide a timeline for the evolution of genetic structuring in corn leafhopper, either instance of maize farming retreat from the vicinity of perennial teosinte habitat (i.e., ∼800 or ∼30 years ago) may have promoted a localized process of habitat‐ or host‐associated differentiation at this particular location, consistent with our hypothesis derived from our haplotype analysis (above).…”

Section: Discussionmentioning

confidence: 99%

Did maize domestication and early spread mediate the population genetics of corn leafhopper?

et al. 2018

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Investigating how crop domestication and early farming mediated crop attributes, distributions, and interactions with antagonists may shed light on today's agricultural pest problems. Crop domestication generally involved artificial selection for traits desirable to early farmers, for example, increased productivity or yield, and enhanced qualities, though invariably it altered the interactions between crops and insects, and expanded the geographical ranges of crops. Thus, some studies suggest that with crop domestication and spread, insect populations on wild crop ancestors gave rise to pestiferous insect populations on crops. Here, we addressed whether the emergence of corn leafhopper (Dalbulus maidis) as an agricultural pest may be associated with domestication and early spread of maize (Zea mays mays). We used AFLP markers and mitochondrial COI sequences to assess population genetic structuring and haplotype relationships among corn leafhopper samples from maize and its wild relative Zea diploperennis from multiple locations in Mexico and Argentina. We uncovered seven corn leafhopper haplotypes contained within two haplogroups, one haplogroup containing haplotypes associated with maize and the other containing haplotypes associated with Z. diploperennis in a mountainous habitat. Within the first haplogroup, one haplotype was predominant across Mexican locations, and another across Argentinean locations; both were considered pestiferous. We suggested that the divergence times of the maize-associated haplogroup and of the "pestiferous" haplotypes are correlated with the chronology of maize spread following its domestication. Overall, our results support a hypothesis positing that maize domestication favored corn leafhopper genotypes preadapted for exploiting maize so that they became pestiferous, and that with the geographical expansion of maize farming, corn leafhopper colonized Z. diploperennis, a host exclusive to secluded habitats that serves as a refuge for archaic corn leafhopper genotypic diversity. Broadly, our results help explain the extents to which crop domestication and early spread may have mediated the emergence of today's agricultural pests.

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Section: Discussionmentioning

confidence: 99%

Did maize domestication and early spread mediate the population genetics of corn leafhopper?

et al. 2018

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“…It has been proposed that parthenogenesis may increase the incidence of HAD (Medina 2012). In fact, several HAD case studies involve parthenogenetic organisms such as pea aphids (Via 1999), grain aphids (Simon et al.…”

Section: Discussionmentioning

confidence: 99%

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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“…Such information along with the results from this study should allow us to combine data on physical movement and gene ßow of cotton ßeahopper populations to better understand the structuring of genetic variation and its implications in the management of this pest. Information gained from population genetic studies have the potential to improve insect pest monitoring and management practices (Denholm and Rowland 1992, Bourguet et al 2000, Endersby et al 2006, Malausa et al 2007, Lozier et al 2008, Medina 2012. For example, knowing the way in which genetic variation is organized may improve the design of strategies to delay resistance to transgenic crops expressing insecticidal toxins (Tabashnik 1994, Carriere et al 2010).…”

Section: Discussionmentioning

confidence: 95%

Population Genetic Structure of <I>Pseudatomoscelis seriatus</I> (Hemiptera: Miridae) in the Cotton-Growing Regions of the United States

Barman¹,

Sansone

Parajulee³

et al. 2013

jnl. econ. entom.

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The cotton fleahopper, Pseudatomoscelis seriatus (Reuter) (Hemiptera: Miridae) is an economically important insect pest of cotton in the United States. However, reports of cotton fleahopper infestation and its management in cotton fields are restricted primarily to Texas, Oklahoma, and Arkansas. The objective of this study was to understand the genetic diversity of cotton fleahopper populations infesting cotton in the cotton-growing areas of the United States. Amplified fragment length polymorphism markers were used to detect genetic diversity and to characterize geographic genotypes across the distribution of the cotton fleahopper in the United States. We used 172 individuals and 559 amplified fragment length polymorphism loci in this study and found significant, but low, level of genetic differentiation among geographic populations (F(ST) = 0.02; P < 0.0001). Molecular fingerprints of cotton fleahopper populations were partitioned into three broad regional genetic populations with a western, central, and eastern distribution. The western (Arizona) and eastern (Florida, Georgia, South Carolina, and North Carolina) populations are genetically distinct, whereas the central (Texas, Oklahoma, Arkansas, Mississippi, Louisiana, and Alabama) population represents an admixed population, which include both western and eastern populations. These results suggest considerable gene flow among the populations within regions but restricted gene flow among populations from eastern and western region.

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Implications of Host‐Associated Differentiation in the Control of Pest Species

Cited by 22 publications

References 160 publications

Did maize domestication and early spread mediate the population genetics of corn leafhopper?

Did maize domestication and early spread mediate the population genetics of corn leafhopper?

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

Population Genetic Structure of <I>Pseudatomoscelis seriatus</I> (Hemiptera: Miridae) in the Cotton-Growing Regions of the United States

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