7 Works

Data from: Shared and non-shared genomic divergence in parallel ecotypes of Littorina saxatilis at a local scale

Mark Ravinet, Anja Westram, Kerstin Johannesson, Roger Butlin, Carl André & Marina Panova
Parallel speciation occurs when selection drives repeated, independent adaptive divergence that reduces gene flow between ecotypes. Classical examples show parallel speciation originating from shared genomic variation, but this does not seem to be the case in the rough periwinkle (Littorina saxatilis) that has evolved considerable phenotypic diversity across Europe, including several distinct ecotypes. Small ‘wave’ ecotype snails inhabit exposed rocks and experience strong wave action, while thick-shelled, ‘crab’ ecotype snails are larger and experience crab...

Data from: Toward the genetic origins of a potentially non-native population of threespine stickleback (Gasterosteus aculeatus) in Alberta

Andrew M. Rezansoff, Erika Crispo, Christopher Blair, Edward Cruz, Jun Kitano, Steven M. Vamosi & Sean M. Rogers
Disentangling the origin of putatively introduced/invasive species is of increasing priority in conservation biology. The presence of a previously undocumented species may be due to an undetected recent population or range expansion associated with environmental change, or due to an introduction by humans. We used molecular tools to address the origin of a population of threespine stickleback (Gasterosteus aculeatus) first identified in central Alberta, Canada in 1980 from a single lake. We characterized this inland,...

Data from: Transcriptome analysis of predator- and prey-induced phenotypic plasticity in the Hokkaido salamander (Hynobius retardatus)

Masatoshi Matsunami, Jun Kitano, Osamu Kishida, Hirofumi Michimae, Toru Miura & Kinya Nishimura
Predator- and prey-induced phenotypic plasticity is widely observed among amphibian species. Although ecological factors inducing diverse phenotypic responses have been extensively characterized, we know little about the molecular bases of variation in phenotypic plasticity. Larvae of the Hokkaido salamander, Hynobius retardatus, exhibit two distinct morphs: the presence of their prey, Rana pirica tadpoles, induces a broad-headed attack morph, and the presence of predatory dragonfly nymphs (Aeshna nigroflava) induces a defence morph with enlarged external gills...

Data from: Complex patterns of cis-regulatory polymorphisms in ebony underlie standing pigmentation variation in Drosophila melanogaster

Ryutaro Miyagi, Naoki Osada, Aya Takahashi & Noriyoshi Akiyama
Pigmentation traits in adult Drosophila melanogaster were used in this study to investigate how phenotypic variations of continuous ecological traits can be maintained in a natural population. First, pigmentation variation in the adult female was measured at seven different body positions in 20 strains from the Drosophila melanogaster Genetic Reference Panel (DGRP) originating from a natural population in North Carolina. Next, to assess the contributions of cis-regulatory polymorphisms of the genes involved in the melanin...

Data from: Mapping of genetic factors that elicit intermale aggressive behavior on mouse chromosome 15: intruder effects and the complex genetic basis

Aki Takahashi, Hiroki Sugimoto, Shogo Kato, Toshihiko Shiroishi & Tsuyoshi Koide
Despite high estimates of the heritability of aggressiveness, the genetic basis for individual differences in aggression remains unclear. Previously, we showed that the wild-derived mouse strain MSM/Ms (MSM) exhibits highly aggressive behaviors, and identified chromosome 15 (Chr 15) as the location of one of the genetic factors behind this escalated aggression by using a panel of consomic strains of MSM in a C57BL/6J (B6) background. To understand the genetic effect of Chr 15 derived from...

Data from: Purifying selection maintains dosage-sensitive genes during degeneration of the threespine stickleback Y chromosome

Michael A. White, Jun Kitano & Catherine L. Peichel
Sex chromosomes are subject to unique evolutionary forces that cause suppression of recombination, leading to sequence degeneration and the formation of heteromorphic chromosome pairs (i.e., XY or ZW). Although progress has been made in characterizing the outcomes of these evolutionary processes on vertebrate sex chromosomes, it is still unclear how recombination suppression and sequence divergence typically occur and how gene dosage imbalances are resolved in the heterogametic sex. The threespine stickleback fish (Gasterosteus aculeatus) is...

Data from: Genetic architecture of the variation in male-specific ossified processes on the anal fins of Japanese medaka

Maiko Kawajiri, Shingo Fujimoto, Kohta Yoshida, Kazunori Yamahira & Jun Kitano
Traits involved in reproduction evolve rapidly and show great diversity among closely related species. However, the genetic mechanisms that underlie the diversification of courtship traits are mostly unknown. Japanese medaka fishes (Oryzias latipes) use anal fins to attract females and to grasp females during courtship; the males have longer anal fins with male-specific ossified papillary processes on the fin rays. However, anal fin morphology varies between populations: the southern populations tend to have longer anal...

Registration Year

  • 2015

Resource Types

  • Dataset


  • National Institute of Genetics
  • Fred Hutchinson Cancer Research Center
  • Kitasato University
  • Tokyo Metropolitan University
  • Jichi Medical University
  • University of Gothenburg
  • University of Tsukuba
  • Hokkaido University
  • University of the Ryukyus
  • Queens College, CUNY