Mating frequency and genetic structure of the Argentine ant Linepithema humile

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Title
Mating frequency and genetic structure of the Argentine ant Linepithema humile
Journal
Molecular Ecology
Author(s)
Krieger  M. J., Keller  L.
ISSN
0962-1083
Publication state
Published
Issued date
02/2000
Peer-reviewed
Oui
Volume
9
Number
2
Pages
119-26
Notes
Journal Article Research Support, Non-U.S. Gov't --- Old month value: Feb
Abstract
The nest and population genetic structures of the Argentine ant, Linepithema humile were investigated using eight microsatellite loci. Genotypes of the sperm from spermathecae of 87 queens were consistent with all queens being singly inseminated. The probability of a double mating remaining undetected was low (0.012) suggesting that no queens or only a very low proportion mate multiply. The relatedness between the queens and their mates was negative (R = -0.164 +/- 0.044) and significantly different to zero (P = 0.020). However, the high negative relatedness value was caused by a significant allele frequency difference between the sexes at a single locus (Lhum-28). When this locus was removed from the analyses, the relatedness was not significantly different from zero (R = 0.013 +/- 0.050, P = 0.812). Analysis of 10 nests revealed that the genetic differentiation among nests was weak (FST = 0.003) and not distinguishable from zero (P = 0.468). Similarly, the overall relatedness among nestmate females was not significantly different from zero (R = 0.007 +/- 0.018, P = 0.706). These results are consistent with the lack of distinct nest boundaries and the large number of queens per nest in the population studied. Although mating takes place inside the nest, the inbreeding coefficient was close to zero (F = 0.007 +/- 0.025, P = 0.786). Overall, these data indicate substantial local gene flow mediated by movement of reproductives among colonies.
Keywords
Animals Ants/genetics/*physiology Female *Genetics, Population Male Microsatellite Repeats Reproduction Sexual Behavior, Animal Social Behavior Spermatozoa/physiology
Pubmed
Web of science
Open Access
Yes
Create date
24/01/2008 18:39
Last modification date
20/08/2019 14:51
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