Molecular and Morphometric Data Indicate a New Species of the Aphid Genus<i>Rhopalosiphum</i>(Hemiptera: Aphididae)

Valenzuela, Isabel; Eastop, V. F.; Ridland, P. M.; Weeks, Andrew R.

doi:10.1603/008.102.0602

Cited by 13 publications

(7 citation statements)

References 63 publications

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“…Many aphid species show cryptic intraspecific variability related to factors such as geographic distribution, host preference, presence of biotypes, or life cycle (Martínez‐Torres et al ., ; Burd et al ., ; Ortiz‐Rivas et al ., ; Valenzuela et al ., ). Detection and analysis of some types of intraspecific variability may be crucial for the design of strategies to fight pest species.…”

Section: Introductionmentioning

confidence: 97%

Two mitochondrial haplotypes in Pterochloroides persicae (Hemiptera: Aphididae: Lachninae) associated with different feeding sites

2012

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Pterochloroides persicae (Cholodkovsky) is an aphid species belonging to the subfamily Lachninae that uses different members of Rosaceae (specially Prunus spp.) as hosts. Partial sequences from the mitochondrial cytochrome c oxidase 1 (COI) and the nuclear long-wave opsin genes were obtained for approximately 100 P. persicae aphid individuals sampled from 34 colonies collected mainly in Tunisia and other Mediterranean locations. The variability found at the mitochondrial locus revealed the presence of two maternal haplotypes in the studied area that differed in a single nucleotide. The nuclear gene analyzed, however, failed to reveal any variability in this species. The variability found at the COI locus was related to the season of aphid sampling and with the site of feeding, with haplotype I mostly detected in samples collected in spring and summer on trunks and branches and haplotype II only detected in aphids collected in autumn on roots. The observed pattern of molecular variation suggests the presence of two clonal races of P. persicae coexisting in the studied area differentially adapted to conditions prevalent in the alternative seasons and/or to different feeding sites.

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Section: Introductionmentioning

confidence: 97%

Two mitochondrial haplotypes in Pterochloroides persicae (Hemiptera: Aphididae: Lachninae) associated with different feeding sites

2012

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“…According to Valenzuela et al (2009) , Rhopalosiphum and Schizaphis form a monophyletic group with Melanaphis van der Goot, 1917, the separation between them being unclear. The vein structure of the wings separates Schizaphis from Rhopalosiphum , however, as there were no alates available, molecular analyses were carried out to verify the relationship with the genus Rhopalosiphum through qualitative and quantitative characters.…”

Section: Introductionmentioning

confidence: 99%

A new species of Rhopalosiphum (Hemiptera, Aphididae) on Chusquea tomentosa (Poaceae, Bambusoideae) from Costa Rica

Hidalgo¹,

Martínez‐Torres²,

Collantes-Alegre³

et al. 2012

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The new species Rhopalosiphum chusqueae Pérez Hidalgo & Villalobos Muller, is described from apterous viviparous females caught on Chusquea tomentosa in Cerro de la Muerte (Costa Rica). The identity of the species is supported both by the morphological features and by a molecular phylogenetic analysis based on a fragment of the mitochondrial DNA containing the 5’ region of the cytochrome c oxidase 1 (COI) and on the nuclear gene coding for the Elongation factor-1 alpha (EF1α). The taxonomic position of the new species is discussed. An identification key to the Aphidinae species living on plants of Bambusoideae (Poaceae) is presented.

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“…Species found coexisting on this hosts were an undescribed Rhopalosiphum sp., which accounted for 60 and 80% of all samples and R. padi Rp1 (Valenzuela et al 2009), whereas Rp2 was never collected from this host. Collections from spring from those years on cereals revealed that Rp2 was abundant in that region indicating that presumably Rp2 may be precluded from using sweet corn as a host, and this requires further work.…”

Section: Discussionmentioning

confidence: 98%

Patterns of Genetic Variation and Host Adaptation in an Invasive Population of Rhopalosiphum padi (Hemiptera: Aphididae)

Valenzuela

Ridland²,

Weeks

et al. 2010

Annals of the Entomological Society of America

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Adaptive changes to local conditions are often thought to be required for successful invasions. However, there are also successful invasive asexual species that may have limited potential for evolutionary change. The bird cherry-oat aphid, Bhopalosiphum padi (L.) (Hemiptera: Aphididae), is thought to have been introduced in Australia 100 yr ago and is now an established pest of cereal crops. Here, we use mitochondrial DNA, cytochrome c oxidase subunit I, and nuclear microsatellites to characterize the genetic diversity in invasive R. padi. Asexual reproduction was detected and clonal diversity was low; with two multilocus genotypes, Rp1 and Rp2, dominating all populations. No geographic or host association was detected between the dominant genotypes on cereals but Rp2 was not found on sweet corn, Zea mays L., crops. The fitness of the predominant multilocus genotypes, Rp1 and Rp2, and an uncommon genotype, Rp26, were investigated on different host types (wheat | Triticum aestivum L. |, barley |Hordeum vulgare L. |, triticale | × Triticosecale Wittm. ex A. Camus. |, and sweet corn | Zea mays L. var. rugosa|) at two temperatures. Rp1 and Rp2 performed similarly on cereals and Rp26 performed poorly on all hosts, patterns that might explain field distributions and abundance of these clones. The results suggest that a high level of clonal diversity is not required for successful invasion and that host associations may develop despite low diversity.

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Molecular and Morphometric Data Indicate a New Species of the Aphid GenusRhopalosiphum(Hemiptera: Aphididae)

Cited by 13 publications

References 63 publications

Two mitochondrial haplotypes in Pterochloroides persicae (Hemiptera: Aphididae: Lachninae) associated with different feeding sites

Two mitochondrial haplotypes in Pterochloroides persicae (Hemiptera: Aphididae: Lachninae) associated with different feeding sites

A new species of Rhopalosiphum (Hemiptera, Aphididae) on Chusquea tomentosa (Poaceae, Bambusoideae) from Costa Rica

Patterns of Genetic Variation and Host Adaptation in an Invasive Population of Rhopalosiphum padi (Hemiptera: Aphididae)

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