1921
Volume 73, Issue 6
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645

Abstract

The chromosomal polymorphism of sensu stricto from Angola was analyzed from indoor-resting samples collected in 11 peri-urban and rural sites of the Luanda and Huambo Provinces, which are > 450 km apart and have distinct eco-climatic conditions. Five polymorphic paracentric inversions were observed (scored chromatids range = 202 to 248): 2R, 2R, 3R, 3R, and 3L. Inversions 3R and 3L were highly polymorphic; the 2R and 3R arrangements were absent in Luanda. No significant departures from Hardy-Weinberg and linkage equilibria were found at the locality, commune, or province level (sites ≤ 50 km from each other), indicating panmixia in each locale. Pooling the Luanda and Huambo samples produced a Wahlund effect, with significant levels of genetic differentiation suggestive of restrictions to gene flow due to geographic distance. The observation that differentiation was limited to inversions 2R and 3R can also be interpreted as divergent selection acting on these chromosomal regions between populations from the two provinces.

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  • Received : 24 Sep 2004
  • Accepted : 10 Feb 2005

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