Abstract:
:Coevolution with parasites is thought to maintain genetic diversity in host populations. However, while there are sound theoretical reasons to expect heterozygosity and parasite resistance to be related, this pattern has generally been shown only in inbred laboratory and island populations. This leaves doubt as to whether parasite-mediated selection for genetic diversity is in fact a general process. Here we show that haematozoan parasite load is linked to two complementary measures of microsatellite variability in an outbred population of mountain white-crowned sparrows (Zonotrichia leucophrys oriantha) for which we know that parasites reduce fitness. Moreover, each of the genetic measures predicts a subtly different aspect of parasitism. Microsatellite heterozygosity is related to an individual's risk of parasitism, and mean d2 (a broader, more long-term measure of parental relatedness) to the severity of infection among parasitized individuals.
journal_name
Biol Lettjournal_title
Biology lettersauthors
MacDougall-Shackleton EA,Derryberry EP,Foufopoulos J,Dobson AP,Hahn TPdoi
10.1098/rsbl.2004.0264subject
Has Abstractpub_date
2005-03-22 00:00:00pages
105-7issue
1eissn
1744-9561issn
1744-957Xpii
L7348405886Q232Mjournal_volume
1pub_type
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