TY - JOUR
T1 - Lutzomyia longipalpis is a species complex
T2 - Genetic divergence and interspecific hybrid sterility among three populations
AU - Lanzaro, G. C.
AU - Ostrovska, K.
AU - Herrero, M. V.
AU - Lawyer, P. G.
AU - Warburg, A.
PY - 1993
Y1 - 1993
N2 - The sand fly Lutzomyia longipalpis is the vector of Leishmania donovani chagasi in Latin America. An analysis of genetic variability at 27 enzyme coding loci among three laboratory populations of Lu. longipalpis revealed substantial genetic polymorphism. Levels of genetic distance between all pairwise comparisons of colonies were very high, and consistent with those previously reported among separate species in the genus Lutzomyia. Between 7% and 22% of the loci studied were diagnostic for any two of the colony populations. Experimental hybridization between colonies resulted in the production of sexually sterile male progeny. Our results provide strong evidence that Lu. longipalpis exists in nature as a complex of at least three distinct species. The possible effects of colonization on the genetic makeup of laboratory populations is considered in extending our results to natural populations.
AB - The sand fly Lutzomyia longipalpis is the vector of Leishmania donovani chagasi in Latin America. An analysis of genetic variability at 27 enzyme coding loci among three laboratory populations of Lu. longipalpis revealed substantial genetic polymorphism. Levels of genetic distance between all pairwise comparisons of colonies were very high, and consistent with those previously reported among separate species in the genus Lutzomyia. Between 7% and 22% of the loci studied were diagnostic for any two of the colony populations. Experimental hybridization between colonies resulted in the production of sexually sterile male progeny. Our results provide strong evidence that Lu. longipalpis exists in nature as a complex of at least three distinct species. The possible effects of colonization on the genetic makeup of laboratory populations is considered in extending our results to natural populations.
UR - http://www.scopus.com/inward/record.url?scp=0027182378&partnerID=8YFLogxK
U2 - 10.4269/ajtmh.1993.48.839
DO - 10.4269/ajtmh.1993.48.839
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C2 - 8333579
AN - SCOPUS:0027182378
SN - 0002-9637
VL - 48
SP - 839
EP - 847
JO - American Journal of Tropical Medicine and Hygiene
JF - American Journal of Tropical Medicine and Hygiene
IS - 6
ER -