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A genetic component of resistance to fungal infection in frog embryos.

Artikel i vetenskaplig tidskrift
Författare Jörgen Sagvik
Tobias Uller
Mats Olsson
Publicerad i Proceedings. Biological sciences / The Royal Society
Volym 275
Nummer/häfte 1641
Sidor 1393-6
ISSN 0962-8452
Publiceringsår 2008
Publicerad vid Zoologiska institutionen
Sidor 1393-6
Språk en
Länkar dx.doi.org/10.1098/rspb.2008.0078
Ämnesord Animals, Embryo, Nonmammalian, Female, Genetic Predisposition to Disease, Immunity, Natural, genetics, Infection, genetics, immunology, veterinary, Male, Ranidae, genetics, immunology, Saprolegnia, immunology, Statistics, Nonparametric
Ämneskategorier Biologiska vetenskaper

Sammanfattning

The embryo has traditionally been considered to completely rely upon parental strategies to prevent threats to survival posed by predators and pathogens, such as fungi. However, recent evidence suggests that embryos may have hitherto neglected abilities to counter pathogens. Using artificial fertilization, we show that among-family variation in the number of Saprolegnia-infected eggs and embryos in the moor frog, Rana arvalis, cannot be explained by maternal effects. However, analysed as a within-females effect, sire identity had an effect on the degree of infection. Furthermore, relatively more eggs and embryos were infected when eggs were fertilized by sperm from the same, compared with a different, population. These effects were independent of variation in fertilization success. Thus, there is likely to be a significant genetic component in embryonic resistance to fungal infection in frog embryos. Early developmental stages may show more diverse defences against pathogens than has previously been acknowledged.

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