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Hyojoong Kim,Min-Young Kim,Kim A. Hoelmer,Seunghwan Lee 한국응용곤충학회 2010 한국응용곤충학회 학술대회논문집 Vol.2010 No.05
Ten novel microsatellite loci were isolated and characterized from the soybean aphid, Aphis glycines. The soybean aphid was recently introduced into North America where it has become a serious pest of soybeans. This invasive pest has rapidly spread throughout the midwestern United States and southern Canada since 2000. The isolated loci were polymorphic, with two to 18 alleles in 20 individuals from a single population in Korea. The analyses revealed that 19 individuals had different multilocus genotypes, showing expected heterozygosity values ranging from 0.180 to 0.891. We report the development of microsatellite markers for A. glycines potentially suitable for further studies of population structure, dispersal, and host alternation.
Hyojoong Kim,Minyoung Kim,Kim A. Hoelmer,Seunghwan Lee 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.05
The soybean aphid, Aphis glycines Matsumura, was recently introduced from Asia into North America (NA) where it has become a serious pest of soybeans. This invasive pest has rapidly spread throughout the midwestern United States and southern Canada since 2000. We examined 585 individuals obtained from 23 different collections in USA, Korea, China, and Japan using eight microsatellite loci. Based on analysis of multilocus genotype, gene diversity and number of alleles in NA were averaging 0.40 and 2.70, whereas in Asia averaging 0.55 and 4.32, respectively. The factorial correspondence analysis displayed that some Korean populations were closely related to the NA populations. Structure analysis resulted in two conspicuous clusters, NA and Asia, as the most likelihood number of clusters (K). Bayesian assignment tests revealed that Osan and Milyang populations were most likely assigned to the NA populations. Bottleneck test did not show significance of genetic bottleneck in all populations. We also discuss the invasive history of the soybean aphid in light of population genetics.
Molecular Identification of the Soybean Aphid on the Primary Host, Rhamnus davurica in Korea
Hyojoong Kim,Yeyeun Kim,Kim A. Hoelmer,Seunghwan Lee 한국응용곤충학회 2009 한국응용곤충학회 학술대회논문집 Vol.2009 No.05
The soybean aphid, Aphis glycines Matsumura 1917, is well known as a soybean pest in the world. Recently, it has been introduced to North America causing serious damage in U.S. As a cooperative research with USDA-ARS, we have investigated A. glycines in soybean fields, and also examined the colonies on the overwintering host Rhamnus davurica in order to find its natural enemies. It was generally reported that A. glycines has host alternation between the soybean, Glycine max (summer host) and the Dahurian buckthorn, Rhamnus davurica (winter host) in East Asia. However, it was very difficult to identify the soybean aphid, A. glycines, from R. davurica due to the co-existance of at least three Aphis species and the seasonal polymorphisms of each species (e.g, gynopara, ovipara, and male). For species identification, we tested 3 molecular markers, mitochondrial COI, COII, and nuclear EF1α, for 14 collected samples (7 samples from G. max and 7 samples from R. davurica). As a result, we found two different species, A. gossypii and other Aphis sp., are mixed together with A. glycines on R. davurica. We report the biology of A. glycines in Korea, and present species identification using molecular phylogenetic approach.
Hyojoong Kim,Minyoung Kim,Deok Ho Kwon,Sangwook Park,Yerim Lee,Hyoyoung Jang,Seunghwan Lee,Si Hyeock Lee,Ki-Jeong Hong,Yikweon Jang 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.05
Lycorma delicatula (White 1845), which has been recently introduced into Korea, is a notorious pest on grapes. This invasive insect has rapidly spread throughout central and southern Korea. To date, we have no behavioral or population genetics information, such as invasion routes and subsequent dispersal rates in Korea, to help understand and control populations of L. delicatula. Here, we have developed 15 novel microsatellite loci for L. delicatula. The isolated loci were polymorphic, with 2 to 19 alleles in 42 individuals from a single population in Cheonan. The analyses revealed that all 42 individuals had different multilocus genotypes with heterozygosity ranging from 0.214 to 0.866. Eleven of the 15 loci did not deviate significantly from Hardy-Weinberg equilibrium. The isolated markers will facilitate population genetic studies of L. delicatula.
Hyojoong Kim,Kim A. Hoelmer,Seunghwan Lee 한국응용곤충학회 2016 한국응용곤충학회 학술대회논문집 Vol.2016 No.04
The soybean aphid, Aphis glycines Matsumura, was introduced about a decade ago from Asia into North America where it has become a serious pest of soybeans. This invasive pest has rapidly spread throughout the midwestern United States and southern Canada since 2000. We examined 689 individuals obtained from 23 different collections in USA, Korea, China and Japan for testing eight microsatellite loci. To estimate the relative likelihood of alternative introduction scenarios of the soybean aphid, an approximate Bayesian computation (ABC) was performed for microsatellite data as implemented in DIYABC. The ABC analysis tested for three scenarios (B1, B2, and B3) hypothesizing an introduction from one of the Asian countries. In this analysis, scenario B1 obtained the highest posterior probability ranging from 0.90 to 0.91 with a 95% CI of 0.81-0.99 and 0.88-0.94, which assumes an introduction from Korea. The ABC analysis revealed that one hypothetical scenario, which assumes an introduction of the soybean aphid into USA from Korea, was very robustly suggested than the other two scenarios (from China or Japan).
DNA Barcording of Blueberry Gall Midge Dasineura oxycoccana (Diptera: Cecidomyiidae)
Hyojoong Kim,Sangwook Park,Taek-Jun Kang,Sejin Kim,Heung-Sik Lee,Ki-Jeong Hong 한국응용곤충학회 2013 한국응용곤충학회 학술대회논문집 Vol.2013 No.04
The blueberry gall midge, Dasineura oxycoccana (Johnson), was recently invaded into Korea, which causes serious damage to blueberries. In the blueberry production regions, the gall midge affects most blueberry varieties, Vaccinium spp., such as rabbiteye and highbush blueberries, causing substantial yield loss by damaging flower and leaf buds. Last year we investigated and collected the midges in the blueberry farms from Korea and USA (New Jersey and Georgia). To confirm inter- and intra-specifc variations of D. oxycoccana, we tested COI DNA barcode using 180 collective individuals plus 37 GenBank references including other Dasineura species. As results, we found the same haplotype from 126 individuals in Korea, USA, and Canada. Most of the remaining haplotypes were closely related to the former, whereas there were 7 unique haplotypes genetically very distant from the major haplotype. Especially, the two haplotypes in Cheonan, Korea, were genetically farthest from the major, and the existence of two different species in New Jersey and Sunchang were confirmed. We would present haplotype diversity and geographic relationships of D. oxycoccana.
Hyojoong Kim,Sangwook Park,Taek-Jun Kang,Sejin Kim,Heung-Sik Lee 한국응용곤충학회 2013 한국응용곤충학회 학술대회논문집 Vol.2013 No.10
To compare genetic characteristic and differentiation between Dasineura oxycoccana populations, we collected 20 local samples from Korea and USA between 2012 and 2013. We established population genetics from Principal component analysis (PCA) and STRUCTURE using newly developed 12 microsatellites for 362 individuals. PCA results showed that Korean populations were divided into three genetically different groups. Correspondingly, STRUCTURE results indicated that Korean populations had at least three different genetic origins, which was totally different from USA populations. Among them, two populations occurring in Heongseong and Cheonan seemed to have species-level difference when matching with previous DNA barcoding result.
Hyojoong Kim,Sangwook Park,Taek-Jun Kang,Sejin Kim,Heung-Sik Lee 한국응용곤충학회 2013 한국응용곤충학회 학술대회논문집 Vol.2013 No.10
The blueberry gall midge, Dasineura oxycoccana (Johnson), which has been recently introduced into Korea, is a notorious pest on blueberries. This invasive insect has rapidly spread throughout Korea including Jeju island. So far, we have no epidemic information, such as invasion routes and subsequent dispersal rates in Korea. To understand population genetics of D. oxycoccana, we have developed 12 novel microsatellite loci. To obtain its sequence data, the next generation sequencing was performed using mixed individuals collected from Korea and USA. The developed loci were polymorphic, with 6 to 16 alleles in 35 individuals from a single population of Hwaseong. The analyses revealed that all 35 individuals had different multilocus genotypes with heterozygosity ranging from 0.568 to 0.790. These markers will facilitate population genetic studies of D. oxycoccana.
Revised checklist of the Korean aphids
Hyojoong Kim,Tae-Woo Kim,Seunghwan Lee 한국응용곤충학회 2010 한국응용곤충학회 학술대회논문집 Vol.2010 No.10
Aphids (Hemiptera: Aphididae) are well known as micro-insect pests, which are very specific to their host plants, sucking phloem for acquiring nutrients, and most of them have successfully maintained parthenogenetic generations cyclically or permanently. In the world, the approximately 5,000 described aphid species belong to the family Aphididae, which has taxonomically been subdivided into 27 subfamilies in current. In recent, we have revised the checklist of the Korean aphids based on 43 references which include the catalogues, checklists, faunistic researches, and taxonomic reports treating the aphids in the Korean Peninsula. As results, we confirmed that a total of 427 valid species (species names) in 142 genera in 16 subfamilies had been historically recognized in the Korean Peninsula after checking classifications and invalid names (misidentifications, synonyms, and etc.). Among them, 36 species need Korean name which mostly were recorded after 2000. We also present and correct the wrong applications of some invalid names still used in official internet databases and documents due to citation of 'Checklist of Insects from Korea (Anonymous, 1994)'.