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François Lieutier - One of the best experts on this subject based on the ideXlab platform.

  • Chapter 10 – The Genus Tomicus
    Bark Beetles, 2015
    Co-Authors: François Lieutier, Bo Langstrom, Massimo Faccoli
    Abstract:

    Abstract The genus Tomicus includes eight species distributed in Europe and/or Asia, with one of them (T. piniperda) having been introduced to North America. Tomicus are monogamous and univoltine species that develop on pines, except for one species that feeds on Picea. Their life cycle alternates between reproductive attacks on stem and sexual maturation in shoots. A species identification key, the phylogenetic tree, and the host ranges are presented. Only the biology of three European species and one Asian species is known sufficiently in detail. They are associated with a large diversity of organisms under the bark of the host tree and whenever possible their role is discussed. They are generally unable to overcome the resistance of healthy trees and thus develop on very weak or recently killed trees, but they can cause considerable damage to shoots, thus sometimes becoming a weakening factor. Factors affecting population abundances and host susceptibility are discussed. Finally, economic and ecological impacts are presented, followed by population management aspects.

  • chapter 10 the genus Tomicus
    Bark Beetles#R##N#Biology and Ecology of Native and Invasive Species, 2015
    Co-Authors: François Lieutier, Bo Langstrom, Massimo Faccoli
    Abstract:

    Abstract The genus Tomicus includes eight species distributed in Europe and/or Asia, with one of them (T. piniperda) having been introduced to North America. Tomicus are monogamous and univoltine species that develop on pines, except for one species that feeds on Picea. Their life cycle alternates between reproductive attacks on stem and sexual maturation in shoots. A species identification key, the phylogenetic tree, and the host ranges are presented. Only the biology of three European species and one Asian species is known sufficiently in detail. They are associated with a large diversity of organisms under the bark of the host tree and whenever possible their role is discussed. They are generally unable to overcome the resistance of healthy trees and thus develop on very weak or recently killed trees, but they can cause considerable damage to shoots, thus sometimes becoming a weakening factor. Factors affecting population abundances and host susceptibility are discussed. Finally, economic and ecological impacts are presented, followed by population management aspects.

  • Predicting the distribution of the two bark beetles Tomicus destruens and Tomicus piniperda in Europe and the Mediterranean region
    Agricultural and Forest Entomology, 2012
    Co-Authors: Agnès Horn, François Lieutier, Carole Kerdelhué, Jean-pierre Rossi
    Abstract:

    1 Various factors such as climate and resource availability influence the geographical distributions of organisms. Species sensitive to small temperature variations are known to experience rapid distribution shifts as a result of current global warming, sometimes leading to new threats to agriculture and forests. Tomicus piniperda and Tomicus destruens (Coleoptera, Curculionidae, Scolytinae) cause economic damage to pines in Europe and around the Mediterranean Basin. However, their respective potential distributions have not yet been studied at a large scale. The present study aimed to investigate the influence of climatic and host factors on the geographical distributions of both Tomicus species in Europe and around the Mediterranean Sea, and to establish maps of suitable areas. 2 Using 114 published localities where the presence or absence of both species was unambiguously recorded, we gathered WorldClim meteorological records to correlate the occurrence of insects with bioclimatic variables and to build potential distribution maps. 3 The two studied Tomicus species presented parapatric distributions and opposite climate demands, with T. destruens occurring in locations with warmer temperatures, whereas T. piniperda occurs under a colder climate. Amongst the investigated climate variables, temperature appeared to be most correlated with both species distributions. 4 The potential ranges of both species were further restricted by the availability of pine hosts. It appeared that setting new pine plantations in regions where T. destruens or T. piniperda are still absent could favour a rapid expansion of their distributions. Our data will be useful when aiming to apply management strategies adapted to each species, and to forecast their potential range expansions/contractions as a result of climate warming.

  • Host Preface of Tomicus piniperda and Tomicus destruens for Three Pin Species
    2006
    Co-Authors: Teresa Vasconcelos, Neusa Nazaré, Manuela Branco, Daniel Sauvard, Carole Kerdelhué, François Lieutier
    Abstract:

    Host preference of four Tomicus portuguese populations was studied using maritime pine (Pinus pinaster Aiton), Aleppo pine (Pinus halepensis Miller) and stone pine (Pinus pinea L.). Beetle preference was evaluated using paired freshly cut logs of different species with similar diameter and bark characteristics. One of the tested populations was identified as Tomicus piniperda and the others as Tomicus destruens, suggesting that this species is dominant in Portugal. Maritime pine was preferred to Aleppo and stone pine. The comparisons between Aleppo pine and stone pine show that the two populations of Tomicus from South of Portugal preferred stone pine and the two populations from North Portugal preferred Aleppo pine.

  • Distribution and population genetic structure of the Mediterranean pine shoot beetle Tomicus destruens in the Iberian Peninsula and Southern France
    Agricultural and Forest Entomology, 2006
    Co-Authors: Teresa Vasconcelos, François Lieutier, Manuela Branco, Agnès Horn, Carole Kerdelhué
    Abstract:

    1 The Mediterranean pine shoot beetle Tomicus destruens has long been indistinguishable from its congeneric Tomicus piniperda. Both species attack pines, and can be found in sympatry. The geographical distribution of T. destruens is still unclear in most of the Mediterranean Basin. 2 We aimed to describe the geographical distribution and zones of sympatry of both species in the Iberian Peninsula and France, and to study the molecular phylogeographical pattern of T. destruens. 3 Tomicus spp. adults were sampled in Portugal, Spain and France, and a portion of the mitochondrial genes COI and COII was sequenced for 84 individuals. Sequences were aligned to a data set previously obtained from French localities. 4 Tomicus destruens was found in all populations, except for one locality in Portugal and in the Landes (France). It was in sympatry with T. piniperda in two locations on Pinus pinaster and one location on Pinus radiata. 5 Within-population genetic diversity was high, but we found a significant pattern of spatial distribution of genetic variation, as well as a significant effect of the host tree. 6 The data suggest the existence of two glacial refugia, from which T. destruens recolonized its current range. One refugium was located in Portugal where the beetle probably evolved on P. pinaster. The corresponding haplotypes show a West–East frequency gradient. The other refugium was probably in the eastern range, where the beetles evolved on Pinus halepensis and P. pinea. The corresponding haplotypes show an East–West frequency gradient.

Zhen Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Differential patterns of ophiostomatoid fungal communities associated with three sympatric Tomicus species infesting pines in south-western China, with a description of four new species
    Pensoft Publishers, 2019
    Co-Authors: Wang Huimin, Sufang Zhang, Fu Liu, Zheng Wang, Xiang bo Kong, Cony Decock, Zhen Zhang
    Abstract:

    Bark beetles and their associated fungi, which cause forest decline and sometimes high mortality in large areas around the world, are of increasing concern in terms of forest health. Three Tomicus spp. (T. brevipilosus, T. minor and T. yunnanensis) infect branches and trunks of Pinus yunnanensis and P. kesiya in Yunnan Province, in south-western China. Tomicus spp. are well known as vectors of ophiostomatoid fungi and their co-occurrence could result in serious ecological and economic impact on local forest ecosystems. Nonetheless, knowledge about their diversity, ecology, including pathogenicity and potential economic importance is still quite rudimentary. Therefore, an extensive survey of ophiostomatoid fungi associated with these Tomicus species infesting P. yunnanensis and P. kesiya was carried out in Yunnan. Seven hundred and seventy-two strains of ophiostomatoid fungi were isolated from the adult beetles and their galleries. The strains were identified based on comparisons of multiple DNA sequences, including the nuclear ribosomal large subunit (LSU) region, the internal transcribed spacer regions 1 and 2, together with the intervening 5.8S gene (ITS) and the partial genes of β-tubulin (TUB2), elongation factor 1α (TEF1-α) and calmodulin (CAL). Phylogenetic analyses were performed using maximum parsimony (MP) as well as maximum likelihood (ML). Combinations of culture features, morphological characters and temperature-dependent growth rates were also employed for species identification. Eleven species belonging to five genera were identified. These included six known species, Esteya vermicola, Leptographium yunnanense, Ophiostoma brevipilosi, O. canum, O. minus and O. tingens and four novel taxa, described as Graphilbum anningense, O. aggregatum, Sporothrix pseudoabietina and S. macroconidia. A residual strain was left unidentified as Ophiostoma sp. 1. The overall ophiostomatoid community was by far dominated by three species, representing 87.3% of the total isolates; in decreasing order, these were O. canum, O. brevipilosi and O. minus. Furthermore, the ophiostomatoid community of each beetle, although harbouring a diversity of ophiostomatoid species, was differentially dominated by a single fungal species; Ophiostoma canum was preferentially associated with and dominated the ophiostomatoid community of T. minor, whereas O. brevipilosi and O. minus were exclusively associated with and dominated the ophiostomatoid communities of T. brevipilosus and T. yunnanensis, respectively. Eight additional species, representing the remaining 12.7% of the total isolates, were marginal or sporadic. These results suggested that sympatric Tomicus populations are dominated by distinct species showing some level of specificity or even exclusivity

  • Intraspecific and interspecific attraction of three Tomicus beetle species during the shoot-feeding phase
    Bulletin of entomological research, 2015
    Co-Authors: Wang Junhui, Zhen Zhang, Hongbin Wang, Xiangbo Kong, Sufang Zhang
    Abstract:

    The shoot beetles Tomicus minor, Tomicus yunnanensis , and Tomicus brevipilosus have been decimating Pinus yunnanensis trees for more than 30 years in Southwestern China. To understand the chemical ecological relationship between pines and Tomicus , and among the three beetle species, we compared the attraction of these beetles to damaged shoots, extracts from damaged shoots, and volatiles from damaged shoots collected by the dynamic headspace sampling method. Experiments were performed using a modified open-arena olfactometer. The male T. minor and both sexes of T. brevipilosus were more strongly attracted to damaged shoots than to undamaged shoots and they showed attraction to shoots damaged by the same species. Female T. minor and both sexes of T. yunnanensis were attracted to shoots damaged by female T. brevipilosus . The three beetle species were attracted to shoot extracts and dynamic headspace volatiles from shoots damaged by the same species and sex. Female T. minor and male T. yunnanensis were also attracted to dynamic headspace volatiles from shoots damaged by both sexes of T. brevipilosus . The results suggested that specific semiochemicals that are induced or produced by T. brevipilosus also attract T. minor and T. yunnanensis . The semiochemicals in damaged shoots affect the attraction of the three beetle species and play an important chemical communication role in weakening the host trees during the beetles’ shoot-feeding phase.

  • Coexistence and Competition between Tomicus yunnanensis and T. minor (Coleoptera: Scolytinae) in Yunnan Pine
    Psyche: A Journal of Entomology, 2012
    Co-Authors: Hong Bin Wang, Zhen Zhang, John A. Byers, You Ju Jin, Hai Feng Wen, Wen Jian Shi
    Abstract:

    Competition and cooperation between bark beetles, Tomicus yunnanensis Kirkendall and Faccoli and Tomicus minor (Hartig) (Coleoptera: Scolytinae) were examined when they coexisted together in living Yunnan pine trees (Pinus yunnanensis Franchet) in Yunnan province in Southwest China. T. yunnanensis bark beetles were observed to initiate dispersal from pine shoots to trunks in November, while the majority of T. minor begins to transfer in December. T. yunnanensis mainly attacks the top and middle parts of the trunk, whereas T. minor mainly resides in the lower and middle parts of the trunk. The patterns of attack densities of these two species were similar, but with T. yunnanensis colonizing the upper section of the trunk and T. minor the lower trunk. The highest attack density of T. Yunnanensis was 297 egg galleries/m2, and the highest attack density of T. minor was 305 egg galleries/m2. Although there was significant overlap for the same bark areas, the two species generally colonize different areas of the tree, which reduces the intensity of competition for the relatively thin layer of phloem-cambium tissues where the beetles feed and reside.

  • Tomicus armandii Li & Zhang (Curculionidae, Scolytinae), a new pine shoot borer from China.
    Zootaxa, 2010
    Co-Authors: Zhen Zhang, Hongbin Wang, Peng Cao, Pei-yi Zhang
    Abstract:

    We describe a new species of forest bark beetle, Tomicus armandii Li & Zhang, collected from Pinus armandii in Yunnan, China. We used the D2 fragment of 28S rDNA to improve the taxonomy of Tomicus. The new species can easily be distinguished from the other Tomicus species using the following two morphological characters: punctures of interstria 2 on declivity appearing evenly biseriate or triseriate; erect interstrial setae on the declivity short, about 0.5× as long as distance between striae. The genetic distances of 28S rDNA measured between T. armandii and other species of Tomicus are similar to the distances between other Tomicus species, and these are much higher than intraspecific distances. The phylogenetic analysis of 28S rDNA agrees with the groupings obtained from morphological identification. DNA analysis has commonly been used in Tomicus taxonomy and is helpful for resolving taxon identification problems.

  • Tomicus armandii li zhang curculionidae scolytinae a new pine shoot borer from china
    Zootaxa, 2010
    Co-Authors: Zhen Zhang, Hongbin Wang, Peng Cao, Pei-yi Zhang
    Abstract:

    We describe a new species of forest bark beetle, Tomicus armandii Li & Zhang, collected from Pinus armandii in Yunnan, China. We used the D2 fragment of 28S rDNA to improve the taxonomy of Tomicus. The new species can easily be distinguished from the other Tomicus species using the following two morphological characters: punctures of interstria 2 on declivity appearing evenly biseriate or triseriate; erect interstrial setae on the declivity short, about 0.5× as long as distance between striae. The genetic distances of 28S rDNA measured between T. armandii and other species of Tomicus are similar to the distances between other Tomicus species, and these are much higher than intraspecific distances. The phylogenetic analysis of 28S rDNA agrees with the groupings obtained from morphological identification. DNA analysis has commonly been used in Tomicus taxonomy and is helpful for resolving taxon identification problems.

Y Duan - One of the best experts on this subject based on the ideXlab platform.

  • genetic study of the forest pest Tomicus piniperda col scolytinae in yunnan province china compared to europe new insights for the systematics and evolution of the genus Tomicus
    Heredity, 2004
    Co-Authors: François Lieutier, Carole Kerdelhué, Y Duan, H Ye
    Abstract:

    The pine shoot beetle Tomicus piniperda is present throughout Eurasia. In Europe, it is considered as a secondary pest that rarely causes tree mortality, while heavy damage is observed in Yunnan Province (China) where it exhibits a novel aggregative behaviour during shoot attack. To understand why the ecological characteristics of the European and Chinese populations differ so strongly, we conducted an analysis of population genetic structure on 12 populations in Yunnan and one in JiLin using mitochondrial (COI-COII) and nuclear (ITS2 and 28S rDNA) DNA sequences, and compared the results to those obtained in France. We showed that the Yunnan populations differed markedly from French and JiLin populations. For all three markers, the genetic distances measured between the Tomicus from Yunnan and those from France were similar to distances previously observed between species. Similar distances were found between Yunnan and JiLin populations. Conversely, the distances between French and JiLin individuals were substantially lower, falling in the intraspecific range. We concluded that the individuals sampled in Yunnan belong to a new, undescribed species (Tomicus sp. nov.). We also showed that some individuals belong to the species T. brevipilosus that had never been recorded from this region before. Evolution of the genus Tomicus is discussed in the light of these new results.

Roberta Haack - One of the best experts on this subject based on the ideXlab platform.

  • P1.5 USINGHISTORICALTEMPERATURERECORDSTO ADJUST THE FEDERALQUARANTINE OF THE PINE SHOOT BEETLE
    2016
    Co-Authors: Forest Meteorology, Th Conf On Biometeorology, Roberta Haack, Theresem Pol, Warren E. Heilman
    Abstract:

    temperature-dependent aspects of Tomicus ' life The pine shoot beetle (Tomicus piniperda (L.); history that are relevant to the quarantine: (1) the Coleoptera: Scolytidae)is a native of Eurasia and timing of initial adult flight in spring and (2) the attacks primarily pine trees (Pinus). Tomicus was timingof initial shoot departure in fall

  • Attack Pattern and Reproductive Ecology of Tomicus brevipilosus (Coleoptera: Curculionidae) on Pinus yunnanensis in Southwestern China
    Journal of insect science (Online), 2015
    Co-Authors: Chen Peng, Roberta Haack
    Abstract:

    Tomicus brevipilosus (Eggers) (Coleoptera: Curculionidae, Scolytinae) was recently discovered as a new pest of Yunnan pine (Pinus yunnanensis Franchet) in Yunnan Province in southwestern China. However, little was known on its reproductive biology and pattern of trunk attack on Yunnan pine. The objectives of this study were to better understand the reproductive biology of T. brevipilosus by investigating the seasonality of trunk attacks by parent adults for the purpose of reproduction (i.e., breeding attacks) and the within-tree pattern of these attacks. Our results showed that T. brevipilosus breeding attacks in P. yunnanensis generally started in early March and ended in early June in Anning County, Yunnan. T. brevipilosus exhibited two general patterns of infestation. From early March to mid-April, T. brevipilosus bred preferentially in the trunks of Yunnan pine trees that were already infested by Tomicus yunnanensis Kirkendall and Faccoli and Tomicus minor (Hartig), colonizing spaces along the trunk (mostly in the mid- and lower trunk) that were not already occupied by the other two Tomicus species. Later, from about mid-April to early June, when there were no Yunnan pine trees newly infested by T. yunnanensis and T. minor, T. brevipilosus attacked Yunnan pine by itself, infesting the lower parts of the trunk first and then infesting progressively upward along the trunk into the crown. Infestation by T. brevipilosus extends the total period that P. yunnanensis trees are under attack by Tomicus beetles in southwestern China, which helps explain why Yunnan pine has suffered high levels of tree mortality in recent decades.

  • Tomicus piniperda (Scolytidae): a serious pest of yunnan pine in southwestern China
    2003
    Co-Authors: Roberta Haack
    Abstract:

    The pine shoot beetle, Tomicus piniperda (L.), is native to the pine growing regions of Europe, Asia, and northern Africa (Bakke 1968; L?ngstrom 1983; Ye 1991). Established populations of T. piniperda were first found in North America in 1992 (Haack and Kucera 1993), and as of January 2002, it now occurs in 318 counties in the United States and 51 counties in Canada (Haack and Poland 2002).

  • Selection of Overwintering Sites by Tomicus piniperda (Coleoptera: Scolytidae) during Fall Shoot Departure
    Journal of Entomological Science, 2002
    Co-Authors: Toby R. Petrice, Roberta Haack, Therese M. Poland
    Abstract:

    Selection of overwintering sites at the base of Scotch pine, Pinus sylvestris L., trees by Tomicus piniperda (L.) adults was monitored in northwestern IN. We monitored adult movement five times dur...

  • Tomicus piniperda (Coleoptera: Scolytidae): is shoot-feeding required for reproductive maturation?
    Great Lakes Entomologist, 2000
    Co-Authors: Therese M. Poland, Roberta Haack
    Abstract:

    The pine shoot beetle, Tomicus piniperda (Coleoptera: Scolytidae), is a univoltine pest of pine in its native range of Europe and Asia. Tomicus piniperda is now widely established in the Great Lakes region and poses a potentially significant threat to other pine-producing areas in North America. An unusual aspect of the life history of T. piniperda is the extended period of maturation-feeding that takes place in the shoots of living pine trees and subsequent overwintering before adults reproduce the following year. We investigated the extent to which shoot-feeding is required by newly-emerged T. piniperda before introduction into Scotch pine (Pinus sylvestris) logs and before any overwintering, in order for successful reproduction to occur. Tomicus piniperda F1 adults successfully reproduced in pine logs in the laboratory after either no shoot-feeding or after 2 to 10 weeks of shoot-feeding. Thus, it is theoretically possible for T. piniperda to be multivoltine, yet it remains univoltine.

Carole Kerdelhué - One of the best experts on this subject based on the ideXlab platform.

  • Predicting the distribution of the two bark beetles Tomicus destruens and Tomicus piniperda in Europe and the Mediterranean region
    Agricultural and Forest Entomology, 2012
    Co-Authors: Agnès Horn, François Lieutier, Carole Kerdelhué, Jean-pierre Rossi
    Abstract:

    1 Various factors such as climate and resource availability influence the geographical distributions of organisms. Species sensitive to small temperature variations are known to experience rapid distribution shifts as a result of current global warming, sometimes leading to new threats to agriculture and forests. Tomicus piniperda and Tomicus destruens (Coleoptera, Curculionidae, Scolytinae) cause economic damage to pines in Europe and around the Mediterranean Basin. However, their respective potential distributions have not yet been studied at a large scale. The present study aimed to investigate the influence of climatic and host factors on the geographical distributions of both Tomicus species in Europe and around the Mediterranean Sea, and to establish maps of suitable areas. 2 Using 114 published localities where the presence or absence of both species was unambiguously recorded, we gathered WorldClim meteorological records to correlate the occurrence of insects with bioclimatic variables and to build potential distribution maps. 3 The two studied Tomicus species presented parapatric distributions and opposite climate demands, with T. destruens occurring in locations with warmer temperatures, whereas T. piniperda occurs under a colder climate. Amongst the investigated climate variables, temperature appeared to be most correlated with both species distributions. 4 The potential ranges of both species were further restricted by the availability of pine hosts. It appeared that setting new pine plantations in regions where T. destruens or T. piniperda are still absent could favour a rapid expansion of their distributions. Our data will be useful when aiming to apply management strategies adapted to each species, and to forecast their potential range expansions/contractions as a result of climate warming.

  • Host Preface of Tomicus piniperda and Tomicus destruens for Three Pin Species
    2006
    Co-Authors: Teresa Vasconcelos, Neusa Nazaré, Manuela Branco, Daniel Sauvard, Carole Kerdelhué, François Lieutier
    Abstract:

    Host preference of four Tomicus portuguese populations was studied using maritime pine (Pinus pinaster Aiton), Aleppo pine (Pinus halepensis Miller) and stone pine (Pinus pinea L.). Beetle preference was evaluated using paired freshly cut logs of different species with similar diameter and bark characteristics. One of the tested populations was identified as Tomicus piniperda and the others as Tomicus destruens, suggesting that this species is dominant in Portugal. Maritime pine was preferred to Aleppo and stone pine. The comparisons between Aleppo pine and stone pine show that the two populations of Tomicus from South of Portugal preferred stone pine and the two populations from North Portugal preferred Aleppo pine.

  • Distribution and population genetic structure of the Mediterranean pine shoot beetle Tomicus destruens in the Iberian Peninsula and Southern France
    Agricultural and Forest Entomology, 2006
    Co-Authors: Teresa Vasconcelos, François Lieutier, Manuela Branco, Agnès Horn, Carole Kerdelhué
    Abstract:

    1 The Mediterranean pine shoot beetle Tomicus destruens has long been indistinguishable from its congeneric Tomicus piniperda. Both species attack pines, and can be found in sympatry. The geographical distribution of T. destruens is still unclear in most of the Mediterranean Basin. 2 We aimed to describe the geographical distribution and zones of sympatry of both species in the Iberian Peninsula and France, and to study the molecular phylogeographical pattern of T. destruens. 3 Tomicus spp. adults were sampled in Portugal, Spain and France, and a portion of the mitochondrial genes COI and COII was sequenced for 84 individuals. Sequences were aligned to a data set previously obtained from French localities. 4 Tomicus destruens was found in all populations, except for one locality in Portugal and in the Landes (France). It was in sympatry with T. piniperda in two locations on Pinus pinaster and one location on Pinus radiata. 5 Within-population genetic diversity was high, but we found a significant pattern of spatial distribution of genetic variation, as well as a significant effect of the host tree. 6 The data suggest the existence of two glacial refugia, from which T. destruens recolonized its current range. One refugium was located in Portugal where the beetle probably evolved on P. pinaster. The corresponding haplotypes show a West–East frequency gradient. The other refugium was probably in the eastern range, where the beetles evolved on Pinus halepensis and P. pinea. The corresponding haplotypes show an East–West frequency gradient.

  • genetic study of the forest pest Tomicus piniperda col scolytinae in yunnan province china compared to europe new insights for the systematics and evolution of the genus Tomicus
    Heredity, 2004
    Co-Authors: François Lieutier, Carole Kerdelhué, Y Duan, H Ye
    Abstract:

    The pine shoot beetle Tomicus piniperda is present throughout Eurasia. In Europe, it is considered as a secondary pest that rarely causes tree mortality, while heavy damage is observed in Yunnan Province (China) where it exhibits a novel aggregative behaviour during shoot attack. To understand why the ecological characteristics of the European and Chinese populations differ so strongly, we conducted an analysis of population genetic structure on 12 populations in Yunnan and one in JiLin using mitochondrial (COI-COII) and nuclear (ITS2 and 28S rDNA) DNA sequences, and compared the results to those obtained in France. We showed that the Yunnan populations differed markedly from French and JiLin populations. For all three markers, the genetic distances measured between the Tomicus from Yunnan and those from France were similar to distances previously observed between species. Similar distances were found between Yunnan and JiLin populations. Conversely, the distances between French and JiLin individuals were substantially lower, falling in the intraspecific range. We concluded that the individuals sampled in Yunnan belong to a new, undescribed species (Tomicus sp. nov.). We also showed that some individuals belong to the species T. brevipilosus that had never been recorded from this region before. Evolution of the genus Tomicus is discussed in the light of these new results.

  • Characterization of five microsatellite loci in the pine shoot beetle Tomicus piniperda (Coleoptera: Scolytidae)
    Molecular Ecology Notes, 2003
    Co-Authors: Carole Kerdelhué, Guenaelle Mondor-genson, Jean-yves Rasplus, A. Robert, François Lieutier
    Abstract:

    Tomicus piniperda is a bark beetle that causes damage to various pine species across a wide geographical range. We developed five microsatellite polymorphic markers using an enrichment protocol. All loci could be successfully amplified with no evidence of null alleles and will be useful for population genetic studies. Cross-species amplifications show that at least some of the markers could be useful in four other Tomicus species.