Abstract:
:Recent evidence suggests that marker-based heterozygosity-fitness correlations may be driven by only one or a few markers, indicating local heterozygosity effects caused by linkage disequilibrium with functional genes. In this study, we investigated the relationship between microsatellite heterozygosity and a measure of cell-mediated immunity (phytohaemagglutinin; PHA) in bluethroat (Luscinia s. svecica) nestlings using a full-sibling design. We found significant positive associations between PHA response and two different indices of microsatellite heterozygosity, i.e. multi-locus heterozygosity and mean d(2). However, model comparisons disclosed that both associations were more likely caused by local effects rather than general effects and that the two local effects appeared to be realized through two different genetic mechanisms. Our results indicate that both the random assortment of parental chromosomes during meiosis as well as inbreeding can drive heterozygosity-fitness correlations.
journal_name
J Evol Bioljournal_title
Journal of evolutionary biologyauthors
Fossøy F,Johnsen A,Lifjeld JTdoi
10.1111/j.1420-9101.2009.01790.xsubject
Has Abstractpub_date
2009-09-01 00:00:00pages
1954-60issue
9eissn
1010-061Xissn
1420-9101pii
JEB1790journal_volume
22pub_type
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