Genetic Differentiation of Southeastern Boll Weevil and Thurberia Weevil Populations of &lt;I&gt;Anthonomus grandis&lt;/I&gt; (Coleoptera: Curculionidae) Using Mitochondrial DNA

Roehrdanz, Richard L.

doi:10.1603/0013-8746(2001)094[0928:gdosbw]2.0.co;2

Cited by 28 publications

(44 citation statements)

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“…Although we found TW to be genetically indistinguishable at AK, CAD, and EF-1␣ from other western samples, including the putative MX form, we did identify a SNP in COI (position 152) distinguishing TW and MX (Table 3), and ⌬AICc support for model 1 and its three traditional forms (including a distinct TW) for ITSII. Although Roehrdanz (2001) and Roehrdanz et al (2010) identiÞed mitochondrial (mt)DNA and ITSII markers, respectively, that are diagnostic among the three forms, precise discernment between trapped TW and SE forms was not possible. In our analysis, ITSII was a poor diagnostic of the TW and MX forms, yet adequate for distinguishing the TW and SE forms.…”

Section: Discussionmentioning

confidence: 99%

“…Re-search addressing phylogenetic or cladistic relationships of wild host-associated boll weevils by using molecular data are sparse and limited thus far to studies of weevils obtained from a single wild cotton host (Gossypium thurberi Todaro) (Roehrdanz 2001) and to weevil samples from cultivated and wild vegetation in South America (Scataglini et al 2000(Scataglini et al , 2006.…”

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confidence: 99%

“…Behavioral and morphological differences between TW and SE forms have been reported previously (zharvBurke 1968, Fye 1968, Burke et al 1986, with the MX form exhibiting traits intermediate to the other two forms (Warner 1966, Burke 1968, Burke et al 1986). However, the phenotypic variation in morphological traits characteristic of the different boll weevil forms is not entirely genetically based, as revealed by larval diet experiments (Burke 1968, Burke et al 1986); therefore, they cannot be used directly for phylogenetic reconstruction or for direct taxonomic designation (Roehrdanz 2001). Nevertheless, morphometric traits, especially in combination with genetic data, have shown potential for identifying the host plant or region of origin (Warner 1966, Burke 1968, Burke et al 1986) and thus for indirectly assigning an individual to a taxonomic form based on this information.…”

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confidence: 99%

“…Molecular markers have been used to evaluate support for the three weevil forms, and previous work by Roehrdanz (2001) supports a genetic separation between TW and SE forms. This separation concurs with the scenario proposed by Burke et al (1986) whereby the boll weevil dispersed northward along the eastern and western coasts of Mexico, isolated by MexicoÕs central mountain ranges.…”

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confidence: 99%

“…The appropriate response by an eradication program depends in part on whether the captured weevils are from local populations infesting commercial cotton or long-distance migrants from cultivated or wild hosts (Kim et al 2010). Diagnostic markers to indicate source areas would be an important tool in helping management ofÞcials determine appropriate control tactics (Roehrdanz 2001). As mentioned, suites of morphological characters could potentially serve in this regard (Warner 1966, Burke 1968, but the differences are subtle, and a diagnostic system has yet to be developed.…”

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confidence: 99%

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Population Structure and Genetic Diversity of the Boll Weevil (Coleoptera: Curculionidae) onGossypiumin North America

Kuester

Jones

Sappington

et al. 2012

Annals of the Entomological Society of America

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Although the boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), is a devastating pest in the United States and Mexico, its population structure and genetic diversity in Mexico on wild and cultivated cotton hosts (genus Gossypium) is poorly understood. Past studies using morphology, host use, and distribution records suggest that A.grandis grandis comprises three forms with host-associated characteristics: the southeastern form (from domesticated Gossypium hirsutum L., southeastern United States and northeastern Mexico), the thurberia form (from Gossypium thurberi Todaro, Arizona and northwestern Mexico), and the Mexican form (from multiple Gossypium species and other malvaceous plant genera in the remainder of Mexico and Central America). However, the phylogenetic relationships, host preferences, and distributions of these forms are not completely understood. An alternative hypothesis of an eastern and western form of the boll weevil is suggested by the suspected phylogeographic range expansion from an ancestral distribution in the tropics northward along both Mexican coasts, culminating in the maximally contrasting phenotypes observed in the northeastern and northwestern arms of the current distribution. In this study, we sequenced one mitochondrial and four nuclear genes to gain insight into the evolutionary relationships among the putative forms and their distributions on wild and domesticated cotton hosts. Using models of evolution, we compared the three-form to the two-form classification and to two alternative classifications that incorporate geography and host use traits. The genetic data at most loci provide stronger support for the two-form than the three-form hypothesis, with an eastern and western group separated by the Sierra Madre Occidental mountain range. They do not support separate taxonomic status for boll weevils developing onG. thurberi. RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted. ABSTRACT Although the boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), is a devastating pest in the United States and Mexico, its population structure and genetic diversity in Mexico on wild and cultivated cotton hosts (genus Gossypium) is poorly understood. Past studies using morphology, host use, and distribution records suggest that A. grandis grandis comprises three forms with host-associated characteristics: the southeastern form (from domesticated Gossypium hirsutum L., southeastern United States and northeastern Mexico), the thurberia form (from Gossypium thurberi Todaro, Arizona and northwestern Mexico), and the Mexican form (from multiple Gossypium species and other malvaceous plant genera in the remainder of Mexico and Central America). However, the phylogenetic relationships, host preferences, and distributions of these forms are not completely understood. An alternative hypothesis of an eastern and western form of...

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Section: Discussionmentioning

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confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Population Structure and Genetic Diversity of the Boll Weevil (Coleoptera: Curculionidae) onGossypiumin North America

Kuester

Jones

Sappington

et al. 2012

Annals of the Entomological Society of America

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Source tracing of Anthonomus grandis captured in areas of the USA where the species had previously been eradicated

et al. 2023

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Anthonomus grandis Boheman (Coleoptera: Curculionidae) is comprised of two subspecies: the boll weevil (A. g. grandis) and the thurberia weevil (A. g. thurberiae). The thurberia weevil is generally regarded as a non-pest variant of the species, whereas the boll weevil is an important economic pest of commercial cotton. In the USA, a nationwide eradication program has been largely successful against the boll weevil, but reintroductions of eradicated zones remain a threat. In 2015, A. grandis was trapped in the functionally eradicated Winter Garden growing region in Texas, where it had not been found since 2012. Weevils established in the area and triggered a multi-year, multi-million-dollar mitigation effort. In 2017, the species was trapped in Hidalgo County, New Mexico, another area where it had been previously eradicated. In this study, we obtained specimens from both trapping events and used double digest restriction site-associated DNA sequencing to obtain genetic data in homology with previously published A. grandis population genetic data. We conducted source tracing to match the captured weevils to previously described populations to determine a likely source population. We also compared the accuracy of the approach to other diagnostic methods currently used by the United States Department of Agriculture. The results suggested that a small founder population of weevils dispersed from the Lower Rio Grande Valley population in southern Texas and northern Tamaulipas and established in the Winter Garden. In Hidalgo Co., NM, the weevils were found to be genetically indistinct from non-pest populations of thurberia weevil associated with Arizona wild cotton (Gossypium thurberi). Thurberia weevils in Arizona remain unlikely to threaten commercial growers. Improved rapid diagnostic tools may be desirable to enable better assessment of trap captures and allow for a reduction in the application of mitigation efforts when the non-pest variant is identified.

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Diversity of Boll Weevil Populations in South America: A Phylogeographic Approach

2006

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A phylogeographic approach was conducted to assess the geographic structure and genetic variation in populations of the boll weevil Anthonomus grandis, which is the most harmful insect pest of cotton in the Americas. COI and COII mitochondrial gene sequences were analyzed to test a former hypothesis on the origin of the boll weevil in Argentina, Brazil and Paraguay, using samples from Mexico and USA as putative source populations. The analysis of variability suggests that populations from South American cotton fields and nearby disturbed areas form a phylogroup with a central haplotype herein called A, which is the most common and widespread in USA and South America. The population from Texas has the A haplotype as the most frequent and gathers in the same group as the South American populations associated with cotton. The sample from Tecomán (México) shows high values of within-nucleotide divergence, shares no haplotype in common with the South American samples, and forms a phylogroup separated by several mutational steps. The sample from Iguazú National Park (Misiones Province, Argentina) has similar characteristics, with highly divergent haplotypes forming a phylogroup closer to the samples from cotton fields, than to the Mexican group. We propose that in South America there are: populations with characteristics of recent invaders, which would be remnants of "bottlenecks" that occurred after single or multiple colonization events, probably from the United States, and ancient populations associated with native forests, partially isolated by events of historical fragmentation.

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Genetic Differentiation of Southeastern Boll Weevil and Thurberia Weevil Populations of <I>Anthonomus grandis</I> (Coleoptera: Curculionidae) Using Mitochondrial DNA

Cited by 28 publications

References 19 publications

Population Structure and Genetic Diversity of the Boll Weevil (Coleoptera: Curculionidae) onGossypiumin North America

Population Structure and Genetic Diversity of the Boll Weevil (Coleoptera: Curculionidae) onGossypiumin North America

Source tracing of Anthonomus grandis captured in areas of the USA where the species had previously been eradicated

Diversity of Boll Weevil Populations in South America: A Phylogeographic Approach

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