Journal: Heredity

Abbreviation

Heredity

Publisher

Nature

Journal Volumes

ISSN

0018-067x
1365-2540

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Publications1 - 10 of 38
  • Invasion success of the bumblebee, Bombus terrestris, despite a drastic genetic bottleneck
    Item type: Journal Article
    Schmid-Hempel, P.; Schmid-Hempel, R.; Brunner, P.C.; et al. (2007)
    Heredity
  • Single-locus sex determination in the parasitoid wasp Cotesia glomerata (Hymenoptera: Braconidae)
    Item type: Journal Article
    Zhou, Yihong; Gu, Hainan; Dorn, Silvia (2006)
    Heredity
    The parasitoid Cotesia glomerata usually produces female-biased sex ratios in the field, which are presumably caused by inbreeding and local mate competition (LMC); yet, sibling mating increases the production of males, leading to the male-biased sex ratio of broods in the laboratory. Previous studies have suggested that the sex allocation strategy of C. glomerata is based on both partial LMC in males and inbreeding avoidance in females. The current study investigated the presence of single-locus complementary sex determination (sl-CSD) as a sex-determining mechanism in this species through inbreeding experiment, cytological examination and microsatellite analysis. Cytological examination detected diploid males in nine of 17 single pairs of sibling mating, thus in agreement with the proportion of matched matings predicted by the sl-CSD model. Sex ratio shifts in these matched sibling matings were consistent with the sl-CSD model with less viable diploid males. The haploid males have a single set of maternal chromosomes (n=10), whereas diploid males possess a double set of chromosomes (2n=20). Microsatellite analyses confirmed that diploid males produced from the matched matings inherited segregating genetic materials from both parents. Thus, this study provides the first solid evidence for the presence of sl-CSD as a sex-determining mechanism in the braconid genus Cotesia.
  • The structural and functional connectivity of the grassland plant Lychnis flos-cuculi
    Item type: Journal Article
    Aavik, Tsipe; Holderegger, Rolf; Bolliger, Janine (2014)
    Heredity
  • Geographically localised bursts of ribosomal DNA mobility in the grasshopper Podisma pedestris
    Item type: Journal Article
    Veltsos, P.; Keller, I.; Nichols, R.A. (2009)
    Heredity
  • Patterns in genetic diversity of Trifolium pallescens populations do not reflect chronosequence on alpine glacier forelands
    Item type: Journal Article
    Raffl, C.; Holderegger, R.; Parson, W.; et al. (2008)
    Heredity
  • Cytoplasmic incompatibility and host population structure
    Item type: Review Article
    Engelstädter, Jan; Telschow, A. (2009)
    Heredity
  • Is floral divergence sufficient to maintain species boundaries upon secondary contact in Mediterranean food-deceptive orchids?
    Item type: Journal Article
    Zitari, A.; Scopece, G.; Helal, A. N.; et al. (2012)
    Heredity
  • Population structure of the wood decay fungus Fomitopsis pinicola
    Item type: Journal Article
    Högberg, N.; Holdenrieder, O.; Stenlid, J. (1999)
    Heredity
  • Isolation-by-distance in landscapes: considerations for landscape genetics
    Item type: Journal Article
    van Strien, Maarten J.; Holderegger, Rolf; Van Heck, Hein J. (2015)
    Heredity
  • Kinship clustering within an ecologically diverse killer whale metapopulation
    Item type: Journal Article
    Baumgartner, Chérine D.; Jourdain, Eve; Bonhoeffer, Sebastian; et al. (2025)
    Heredity
    Metapopulation dynamics can be shaped by foraging ecology, and thus be sensitive to shifts in prey availability. Genotyping 204 North Atlantic killer whales at 1346 loci, we investigated whether spatio-temporal population structuring is linked to prey type and distribution. Using population-based methods (reflecting evolutionary means), we report a widespread metapopulation connected across ecological groups based upon nuclear genome SNPs, yet spatial structuring based upon mitogenome haplotypes. These contrasting patterns of markers with maternal and biparental inheritance are consistent with matrilineal site fidelity and philopatry, and male-mediated gene flow among demes. Connectivity between fish-eating and ‘mixed-diet’ (eating both fish and mammal prey) killer whales, marks a deviation within a species renowned for its marked structure associated with ecology. However, relatedness estimates suggest distinct spatial clusters, and heterogeneity in recent gene flow between them. The contrasting patterns between inference of structure and inference of relatedness suggest that gene flow has been partially restricted over the past two to three generations (50–70 years). This coincides with the collapse of North Atlantic herring stocks in the late 1960s and the subsequent cessation of their seasonal connectivity. Statistically significant association between diet types and assignment of Icelandic killer whales to relatedness-based clusters indicated limited gene flow was maintained through Icelandic ‘mixed-diet’ whales when herring-mediated connectivity was diminished. Thus, conservation of dietary variation within this metapopulation is critical to ensure genetic health. Our study highlights the role of resource dynamics and foraging ecology in shaping population structure and emphasises the need for transnational management of this widespread migratory species and its prey.
Publications1 - 10 of 38