NSW Fisheries, Port Stephens Research Centre, Taylors Beach Road, Taylors Beach, NSW 2135, Australia.
Can fluctuating asymmetry be used to detect inbreeding and loss of genetic diversity in endangered populations?
Version of Record online: 28 FEB 2006
Volume 3, Issue 2, pages 97–104, May 2000
How to Cite
Gilligan, D. M., Woodworth, L. M., Montgomery, M. E., Nurthen, R. K., Briscoe, D. A. and Frankham, R. (2000), Can fluctuating asymmetry be used to detect inbreeding and loss of genetic diversity in endangered populations?. Animal Conservation, 3: 97–104. doi: 10.1111/j.1469-1795.2000.tb00234.x
- Issue online: 28 FEB 2006
- Version of Record online: 28 FEB 2006
- (Received 26 April 1999; accepted 17 September 1999)
Fluctuating asymmetry (FA), a measure of developmental stability, has been proposed as a simple technique for identifying populations suffering from inbreeding and a loss of genetic diversity. However, there is controversy regarding the relationship between FA and both allozyme heterozygosity and pedigree inbreeding coefficients (F). FA of sternopleural bristle number in Drosophila melanogaster was measured in populations maintained at effective sizes of 25 (8 replicates), 50 (6), 100 (4), 250 (3) and 500 (2) for 50 generations (inbreeding coefficients of 0.05—0.71). FA was calculated from the same data set using three different indices (FA1, FA5 and FA6). There was no significant relationship of FA with pedigree inbreeding coefficients for any of the three indices. The relationship between FA and allozyme heterozygosity was non-significant for indices FA5 and FA6 (the more powerful indices) and only significant for FA1. A second comparison of highly inbred (F ∼ 1) populations with their outbred base population showed significantly greater FA in the inbred populations only when analysed with FA6. Analysis of the same data using FA1 and FA5 showed non-significant relationships in the opposite direction. If a relationship between FA and genetic diversity does exist, it is weak and inconsistent. Consequently, our results do not support the use of FA as a monitoring tool to detect inbreeding or loss of genetic diversity.