A5081027856- Genetic diversity and population structure
- Insect Resistance and Genetics
- Chromosomal and Genetic Variations
- Insect behavior and control techniques
- Plant and animal studies
- Genomics and Phylogenetic Studies
- Insect and Arachnid Ecology and Behavior
- Invertebrate Immune Response Mechanisms
- Evolution and Genetic Dynamics
- Silkworms and Sericulture Research
- Neurobiology and Insect Physiology Research
- Identification and Quantification in Food
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Insect and Pesticide Research
- Entomopathogenic Microorganisms in Pest Control
- Insect Utilization and Effects
- Insect-Plant Interactions and Control
- Insect symbiosis and bacterial influences
- Genetic Mapping and Diversity in Plants and Animals
- Animal Behavior and Reproduction
- Forest Insect Ecology and Management
- Ecology and Vegetation Dynamics Studies
- Race, Genetics, and Society
- DNA Repair Mechanisms
- Tree Root and Stability Studies
Kyorin University
2006-2022
Hokkaido University
1994-2011
Tokyo Metropolitan University
1979-2006
University of Tsukuba
2001
College of Wooster
1987
Kyushu University
1980-1983
National Institute of Genetics
1983
Abstract The sequencing of the 12 genomes members genus Drosophila was taken as an opportunity to reevaluate genetic and physical maps for 11 species, in part aid mapping assembled scaffolds. Here, we present overview importance cytogenetic biology concepts chromosomal evolution. Physical markers were used anchor genome assembly scaffolds polytene each species. In addition, a computational approach smaller on basis analysis syntenic blocks. We map data from sequenced non-Drosophila...
The genetic basis of sexual isolation that contributes to speciation is one the unsolved questions in evolutionary biology. Drosophila ananassae and pallidosa are closely related, postmating has not developed between them. However, females both species discriminate their mating partners, this discrimination strong By using surgical treatments, we demonstrate male courtship songs play a dominant role female mate discrimination. absence song D. dramatically increased interspecies with but...
Drosophila ananassae and its relatives have many advantages as a model of genetic differentiation speciation. In this report, we examine evolutionary relationships in the species subgroup using multi-locus molecular data set, karyotypes, meiotic chromosome configuration, chromosomal inversions, morphological traits, patterns reproductive isolation. We describe several new taxa that are closest known D. ananassae. Analysis Y-chromosomal mitochondrial haplotypes, shared arrangements,...
ABSTRACT In order to test the interaction effect of overdominance and random genetic drift on formation linkage disequilibria under condition multiplicative gene action, between isozyme genes, inter se, polymorphic inversions genes were tested for second chromosomes Drosophila melanogaster sampled from two isolated Pacific islands one locality northern district mainlands Japan. The effective sizes these populations known be approximately 3,000 6,000 basis allelism rate lethal their...
Sexual isolation is one of the most important mechanisms that may lead to speciation. Drosophila ananassae and D. pallidosa are useful for study sexual isolation, because their sympatric distribution no postmating between them. Courtship songs considered play a crucial role in pallidosa. We recorded analyzed male courtship eight four geographical strains, respectively. behaviors two species were consistent with those previously described, however, male's middle leg shaking, which had not...
We have prepared reference polytene photographic maps as a standard sequence for the Drosophila bipectinata complex using structurally homozygous flies derived from stock of parabipectinata Brunei, Borneo, in 1971. found 87 inversions D. and described their breakpoints on maps. Only 2 arrangements were shared interspecifically: 2R-AB was with 3 species, parabipectinata, bipectinata, malerkotliana, 3L-A malerkotliana. The subspecies malerkotliana pseudoananassae half total gene detected each...
SUMMARY Using the 602 second chromosome lines extracted from Ishigakijima population of Drosophila melanogaster in Japan, partial diallel cross experiments (Design II Comstock & Robinson, 1952) were carried out, and additive genetic variance dominance viability estimated. The estimated value is 0·01754±0·00608, 0·00151±0·00114, using a logarithmic scale. Since much larger than expected under mutation–selection balance although compatible with it, we speculate that some type balancing...
Strong sexual isolation exists between the closely related species Drosophila ananassae and D. pallidosa , but there is no obvious post-mating isolation; both sexes of hybrids their descendants appear to be completely viable fertile. Strains exhibiting parthenogenesis have been derived from wild populations species. We intercrossed such strains established iso-female lines after second generation parthenogenesis. These are clones, carrying homozygous chromosomes that interspecific...
CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 51:1-10 (2012) - DOI: https://doi.org/10.3354/cr01047 Effect of a deciduous shrub on microclimate along an elevation gradient, Mount Koma, northern Japan Shiro Tsuyuzaki1,*, Miyuki Matsuda1,2, Munemitsu Akasaka1,3 1Graduate School Environmental Earth Science, Hokkaido University, Sapporo 060-0810, 2Present address: IDEA...
Spontaneous crossing over in males of Drosophila ananassae has been well demonstrated using F 1 individuals from crosses between marker stocks and wild type strains. However, the question its occurrence natural populations remained open. Here we present cytological evidence that does occur D. two Brazilian populations, sampled nearly 21 years apart, recently one Indonesia Okinawa, Japan. Cytological analysis meiosis collected nature sons females same population inseminated revealed presence...
We surveyed natural population of the Drosophila ananassae species complex on Penang Island, Malaysia. Analyses phenotypic traits, chromosome arrangements, molecular markers, and reproductive isolation suggest existence two species: D. cf. parapallidosa. Molecular marker analysis indicates that parapallidosa carries Y 4 introgressions from ananassae. Thus, seems to be a hybrid descendant recently originated parapallidosa♀× ananassae♂ cross. Furthermore, behaves differently authentic with...
Parthenogenetic strains of several species have been found in the genus Drosophila . The mode diploidization eggs females has to be post-meiotic nuclear fusion. genetic basis for this parthenogenesis is not understood but believed under control a complex polygenic system. We parthenogenetic an isofemale strain (LAE345) D. pallidosa -like collected 1981 at Lae, Papua New Guinea, and established parthenogenetically reproducing strain. ananassae Taputimu, American Samoa had also by Futch...
Genetic factors controlling recombination frequencies in the second and third chromosomes of males with constructed genomes autosomes Y-chromosome from several strains D. ananassae were investigated. Recombination highly variable depending on male. The highest value interval ml-ru chromosome was 42.8%, which close to female, 45.4%. presence major genetic diagnosed, some concurrently revealed, especially that derived Tonga “dark” form. It is most worthy note observed male autosomes, Y...
Genetic elements controlling male recombination were detected in the autosomes of two wild strains, L8 and TNG, a marker stock, b Arc se; bri ru, Drosophila ananassae. In strain, dominant enhancer, En(2)-cm, which acts on both chromosomes 2 3 unison, is located between loci left arm chromosome 2. addition, reducer, Ra, En(2)-cm right this strain. The action reducer expressed as progressive decrease frequency with increasing age parent. No such single major enhancer was present TNG However,...
The Drosophila ananassae species cluster includes D. ananassae, pallidosa, parapallidosa, and the cryptic “pallidosa-like”, “pallidosa-like Wau” “papuensis-like” Some of taxa are sympatric in South Pacific, Papua New Guinea, Southeast Asia, gene flow between different has been suspected for a handful genes. In present analysis, we examined DNA sequences introns four loci: alpha actinin (Actn) on XL, white (w) XR, CG7785 2L, zinc ion transmembrane transporter 63C (ZnT63C) 2R. Phylogenetic...
Semidominant, optic morphology (Om) mutants in Drosophila ananassae have been genetically mapped to at least 25 loci throughout the genome (Hinton, 1984; 1988). Among them, four X-linked Om were proved be associated with insertion of a transposable element, tom (Shrimpton et al., 1986; Tanda In present study, cytological mapping autosomal was carried out by situ hybridization polytene chromosomes using cloned element as probe. The site for each mutant has determined single band salivary...
Abstract Facultative parthenogenesis occurs in many animal species that typically undergo sexual reproduction. In Drosophila, such development from unfertilized eggs involves diploidization after completion of meiosis, but the exact mechanism remains unclear. Here we used a laboratory stock Drosophila ananassae has been maintained parthenogenetically to cytologically examine initial events parthenogenesis. Specifically, determined whether requirements for centrosomes and are essential...
We constructed and characterized arrayed bacterial artificial chromosome (BAC) libraries of five Drosophila species (D. melanogaster, D. simulans, sechellia, auraria, ananassae), which are genetically well in the studies meiosis, evolution, population genetics, developmental biology. The BAC comprise 8,000 to 12,500 clones for each species, estimated cover most genomes. sequenced both ends these with a success rate 91%. Of these, 53,701 consisting non-repetitive end sequences (BESs) were...