Strain Distribution of Alfalfa Weevil (Coleoptera: Curculionidae) in an Intergrade Zone

Bundy, C. Scott; Smith, Paul F.; English, L. M.; Sutton, Dennis W.; Hanson, Stephen F.

doi:10.1093/jee/98.6.2028

Cited by 14 publications

(18 citation statements)

References 18 publications

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“…The invasion of H. postica to much of the Holarctic region is well documented with the first introductions to the America in 1904 (Titus, ), Japan in 1982 (Kuwata, Tokuda, Yamaguchi, & Yukawa, ), and Korea in 2002 (Hong & Kim, ). Historically, the alfalfa weevil populations in the America were categorized into three lineages which were called Eastern, Egyptian, and Western strains (Bundy, Smith, English, Sutton, & Hanson, ). Each strain was introduced to America via an independent route and time (Radcliffe & Flanders, ).…”

Section: Introductionmentioning

confidence: 99%

“…While there is a lack of distinct morphological characters (Bland, ; Pienkowski, Hsieh, & Lecato, ; Sanaei, Seiedy, & Momtazi, ), several fluctuating ecological traits were diagnosed to be strain specific including response to parasitoids and location of pupation (Coles & Day, ; Dewitt & Armbrust, ; Litsinger & Apple, ). However, the usefulness of these characters is questionable as strains with certain ecological characters were determined only based on their location and most of the mentioned characters were not applicable or showed huge variation and overlap among strains (Bundy et al, ; Sanaei et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…The unsuccessful cross mating between uninfected Eastern and infected Western lineage individuals indicated a reproduction barrier caused by bidirectional CI (Hsiao & Hsiao, ). A study of American populations further suggested that the Western lineage is naturally infected, whereas the Eastern lineage is naturally resistant to Wolbachia (Bundy et al, ; Hsaio, ). However, in Japan, an Eastern lineage sample was found to be infected with Wolbachia; yet, here none of the examined Western lineage samples were infected (Iwase, Tani, et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Global genetic diversity, lineage distribution, and Wolbachia infection of the alfalfa weevil Hypera postica (Coleoptera: Curculionidae)

Sanaei

Husemann

Seiedy

et al. 2019

Ecology and Evolution

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The alfalfa weevil (Hypera postica) is a well‐known example of a worldwide‐distributed pest with high genetic variation. Based on the mitochondrial genes, the alfalfa weevil clusters into two main mitochondrial lineages. However, there is no clear picture of the global diversity and distribution of these lineages; neither the drivers of its diversification are known. However, it appears likely that historic demographic events including founder effects played a role. In addition, Wolbachia, a widespread intracellular parasite/symbiont, likely played an important role in the evolution of the species. Wolbachia infection so far was only detected in the Western lineage of H. postica with no information on the infecting strain, its frequency, and its consequences on the genetic diversity of the host. We here used a combination of mitochondrial and nuclear sequences of the host and sequence information on Wolbachia to document the distribution of strains and the degree of infection. The Eastern lineage has a higher genetic diversity and is found in the Mediterranean, the Middle East, Eastern Europe, and eastern America, whereas the less diverse Western lineage is found in Central Europe and the western America. Both lineages are infected with the same common strain of Wolbachia belonging to Supergroup B. Based on neutrality tests, selection tests, and the current distribution and diversification of Wolbachia in H. postica, we suggested the Wolbachia infection did not shape genetic diversity of the host. The introduced populations in the United States are generally genetically less diverse, which is in line with founder effects.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Global genetic diversity, lineage distribution, and Wolbachia infection of the alfalfa weevil Hypera postica (Coleoptera: Curculionidae)

Sanaei

Husemann

Seiedy

et al. 2019

Ecology and Evolution

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“…Most current studies have focused on American and Japanese lineages. In less than a century after its introduction in America (Titus, 1909), populations have diverged and a detectable hybrid zone between lineages has been established (Hsaio, 1996;Bundy et al, 2005). Differences between alfalfa weevil populations have been detected for molecular (Hsiao, 1993;Kuwata et al, 2005;Böttger et al, 2013), morphological (Pienkowski et al, 1969;Bland, 1984), and ecological aspects (Armbrust et al, 1969;Davis, 1970;Hsiao and Hsiao, 1985;Skuhrovec et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Developmental differences of local populations of alfalfa weevil (Hypera postica) (Coleoptera: Curculionidae)

Sanaei¹,

Seiedy²

2016

Turk J Zool

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Many invasive insect pests show phenotypic variation between local populations across their geographical range. Understanding and integrating such differences will help to improve pest management. Population differences are the result of local adaptation to environmental conditions and may be detected using ecological analyses. Immature stages may represent especially interesting study objects as they represent important stages in the life cycle of insects and in many cases may be the most destructive stage. The alfalfa weevil, Hypera postica (Gyllenhal, 1813), is a variable worldwide pest that heavily damages alfalfa fields and is widely distributed in Iran. The lack of information about Iranian populations of H. postica has motivated us to examine immature life stages of three western populations (Karaj, Hamedan, Tuyserkan) and one eastern population (Jovein) under laboratory conditions. We measured the percentage of survival and the developmental times of each immature stage. The results suggested that the mean duration of the pupa stage significantly differs among the eastern population and all western populations (P < 0.005). Egg survivorship was lower in the eastern population (72.5%). The importance of differences in development times between populations is discussed in regards of pest management strategies.

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“…North American populations are some of the best known populations of this pest. Since it was first introduced into United States about one century ago, three molecular strains have been identified (Hsiao 1993), and one strain (Egyptian strains) was erroneously elevated to other Hypera species, Hypera brunneipennis (Boheman, 1834) (Bundy et al 2005).…”

Section: Introductionmentioning

confidence: 99%

A uni- and multivariate analysis approach to reveal sexual size dimorphism in Iranian populations of Hypera postica (Coleoptera: Curculionidae)

2015

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Body size dimorphism between genders is a commonly observed phenomenon in insects, usually manifested in larger female body size. Sexual Size Dimorphism (SSD) varies from species to species, the degree and direction influenced by certain evolutionary pressures. Intraspecific variation in SSD may also occur between populations. The Hypera postica (Gyllenhal, 1813) is a well-known alfalfa plant pest that shows a degree of morphological divergence in its populations. The female alfalfa weevils are very fecund and have a larger body size compared to males. To improve our knowledge on magnitude and direction of SSD in alfalfa weevil, we studied 200 specimens of H. postica from four Iranian populations (Karaj1, Karaj2, Tuyserkan and Jovein). 10 morphological variables from three external anatomic parts (pronotum, elytra and rostrum) and 45 ratio characters were statistically analyzed in order to determine the amount of SSD in Iranian populations. In addition we investigated for morphological divergence pattern in mentioned populations. The results of this study show that a low degree of morphological divergence occurs in Iranian populations. Measured variables indicate that the SSD pattern of H. postica is compatible with the Rensch’s rule, and is related to high fecundity of females and a lack of strong sexual selection. Also it is mentioned that the larger rostrum in females may correspond to its unique role in egg laying.

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Strain Distribution of Alfalfa Weevil (Coleoptera: Curculionidae) in an Intergrade Zone

Cited by 14 publications

References 18 publications

Global genetic diversity, lineage distribution, and Wolbachia infection of the alfalfa weevil Hypera postica (Coleoptera: Curculionidae)

Global genetic diversity, lineage distribution, and Wolbachia infection of the alfalfa weevil Hypera postica (Coleoptera: Curculionidae)

Developmental differences of local populations of alfalfa weevil (Hypera postica) (Coleoptera: Curculionidae)

A uni- and multivariate analysis approach to reveal sexual size dimorphism in Iranian populations of Hypera postica (Coleoptera: Curculionidae)

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