Effects of fragmentation and anthropic pressure on the genetic structure of Canthon (Peltecanthon) staigi (Coleoptera: Scarabaeidae) populations in the Atlantic Forest domain

Ferreira-Neto, Celso Alexandre; Cruz, Geyner Alves dos Santos; Amorim, Igor Costa; Balbino, Valdir Queiroz; Moura, Rita de Cássia de

doi:10.1007/s10841-017-9980-4

Cited by 7 publications

(6 citation statements)

References 41 publications

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“…The expected heterozygosity (H E ) presented variation between 0.285 in MAC-AL and 0.363 OUR-PE. These values are similar to those described for other insects, such as the grasshoppers Pezotettix giornae (Rossi, 1794) (Gauffre et al, 2015) and E. plorans (Manrique-Poyato et al, 2013a); the honey bee Apis mellifera meda (Skorikow, 1829) (Rahimi et al, 2016); as well as the low value in the beetle Canthon staigi (Pereira, 1953) (Ferreira-Neto et al, 2017 and the high value in Lucanus cervus (Linnaeus, 1758) (Snegin, 2014). Although it has already been evinced that in grasshoppers the presence of B chromosomes may contribute to the increase in genetic variability, this relationship was not observed for R. brasiliensis, in which some populations present low H E , such as ST-PE (0,291) and JN-CE (0.290).…”

Section: Genetic Connectivity Between Populations Of R Brasiliensissupporting

confidence: 79%

Wide dispersion of B chromosomes in Rhammatocerus brasiliensis (Orthoptera, Acrididae)

et al. 2020

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The grasshopper Rhammatocerus brasiliensis shows polymorphism of B chromosomes, but the magnitude of B-chromosome occurrence and the factors that may contribute to their dispersion in the species remain unknown thus far. The present study analyzed the occurrence and dispersion of B chromosomes in R. brasiliensis individuals from 21 populations widely distributed in the Brazilian Northeast. The genetic connectivity between 10 populations was verified through analysis of ISSR markers from 200 individuals. Of the 21 populations, 19 presented individuals with one B chromosome, three with two, and one with three B chromosomes. The B chromosome is of medium size and constitutive heterochromatin (CH) located in the pericentromeric region. A variant B chromosome was observed in three populations, similar in size to that of chromosome X, gap and CH, and located in the terminal region. B chromosome frequencies in different populations varied from 0% to 18,8%, mean 8,5%. The wide distribution of the B chromosome is likely a consequence of the positive gene flow among the analyzed populations. B-chromosome occurrence in populations of R. brasiliensis possibly follows the population genetic structure of the species and, owing to the existence of a variant, its origin may not be recent.

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Section: Genetic Connectivity Between Populations Of R Brasiliensissupporting

confidence: 79%

Wide dispersion of B chromosomes in Rhammatocerus brasiliensis (Orthoptera, Acrididae)

et al. 2020

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“…18,19 The colonization of new areas determines demographic shifts, which can shape genetic diversity or homogeneity, mainly when facing population bottleneck events. 9,[33][34][35] Curiously, such shifts are not yet clearly characterized for O. poecilus and O. ypsilongriseus.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, ISSR markers combine the benefits of random amplified polymorphic DNA (RAPD) with reproducibility and specificity without requiring prior target sequence knowledge. 25 These traits led to the use of ISSR markers in several studies during the last decade attempting to characterize the genetic structure of species from different insect taxa, from Hemiptera, [26][27][28] to Lepidoptera, [29][30][31] Coleoptera, 32,33 Diptera, 34,35 and Hymenoptera. 36 Thus, suggesting its potential usefulness for rice stink bugs.…”

Section: Introductionmentioning

confidence: 99%

Disentangling aNeotropicalpest species complex: genetic diversity and population structure of the native rice stink bugOebalus poecilusand the invasiveO. ypsilongriseus

Vieira

Oliveira

Barrigossi

et al. 2022

Pest Management Science

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BACKGROUND: A first step in any pest management initiative is recognizing the existing problemidentifying the pest species and its abundance and dispersal capacities. This is not simple and even more challenging when insidious (invasive) species are involved constituting a pest complex. Understanding a species' population diversity and structure can provide a better understanding of its adaptation and relative pest potential. Such is the need for the native rice stink bug Oebalus poecilus and the invasive O. ypsilongriseus in low and high flatlands of South America. RESULTS:The genetic structure differed between both rice stink bug species (F ST = 0.157, P = 0.001), where 84% of the overall genetic variability takes place within species and three genetic groups were recognized through Bayesian approach (K = 3). Oebalus poecilus exhibited slightly higher genetic diversity (H E = 0.253) and structuring (F ST = 0.050, P = 0.001) than the invasive O. ypsilongriseus (H E = 0.211; F ST = 0.038, P = 0.013). Nonetheless, only the former exhibited significant correlation between genetic and geographic distances (r = 0.48, P = 0.013).CONCLUSION: Despite the pointed peculiarities, the obtained results indicate overlap in both species' occurrence and similar genetic structure allowing for a compound problem to be dealt with as the complex requires managing without, as yet, a prevailing species or a niche specialization.

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“…Similarly, in the species Canthon staigi Pereira, 1953 with wide distribution in the Atlantic forests in Brazil, Paraguay, and Argentina, the effect of habitat loss and fragmentation decreases the genetic diversity of its populations. However, they do not have a fragmented genetic structure due to a high gene flow between populations (Ferreira-Neto et al, 2017). This suggests that the current diversity and genetic structure of neotropical Scarabaeinae populations may be influenced by changes in the landscape caused by anthropic activities.…”

Section: Diversity and Genetic Structurementioning

confidence: 99%

Evolutionary history and diversity in the ball roller beetle Canthon cyanellus

2023

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To understand the evolutionary history of species, it is necessary to know the mechanisms for reproductive isolation, divergence-time between populations, and the relative action of the evolutionary forces (e.g., mutation, genetic drift, gene flow) within and between populations of the same, or closely related species. Although Canthon is one of the more diverse genera of neotropical beetles, insufficient research has been done to comprehend the divergent patterns that explain its speciation process. The absence of diagnostic morphological characters and the wide geographic variation of qualitative traits in Scarabaeinae obscures species delimitation, genealogical limits between populations, and its taxonomy. Canthon cyanellus is one of the best-known species in ecological and evolutionary aspects. It is a widely distributed species in the tropical forests of America. Also, the current deforestation has facilitated its incursion into open areas. Individuals from different populations have similar morphological characters but show wide variation in body color throughout their distribution, which makes it difficult to delimit the subspecies that comprise it. Recently, studies have been carried out to elucidate the pre-and postzygotic isolation mechanisms between populations and the historical biogeographical processes favoring cladogenesis events during the Pleistocene. Morphological variation of the male genitalia does not correspond to the phylogeographic structure. However, the morphological differences in one of the pieces of the endophallic sclerites have allowed a preliminary delimitation of some genetically differentiated clades. Finally, we consider that the joint analysis of traditional morphological taxonomy and phylogeography is important to understand the speciation process in the C. cyanellus complex.

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Effects of fragmentation and anthropic pressure on the genetic structure of Canthon (Peltecanthon) staigi (Coleoptera: Scarabaeidae) populations in the Atlantic Forest domain

Cited by 7 publications

References 41 publications

Wide dispersion of B chromosomes in Rhammatocerus brasiliensis (Orthoptera, Acrididae)

Wide dispersion of B chromosomes in Rhammatocerus brasiliensis (Orthoptera, Acrididae)

Disentangling aNeotropicalpest species complex: genetic diversity and population structure of the native rice stink bugOebalus poecilusand the invasiveO. ypsilongriseus

Evolutionary history and diversity in the ball roller beetle Canthon cyanellus

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