期刊
INSECT MOLECULAR BIOLOGY
卷 13, 期 4, 页码 371-377出版社
WILEY
DOI: 10.1111/j.0962-1075.2004.00494.x
关键词
Anopheles gambiae; molecular forms; voltage-gated sodium channel gene
We present the results of a geographical survey of genetic variation in Anopheles gambiae M and S molecular forms from ten African countries at Intron I of the voltage-gated sodium channel gene. We found two major haplotypes separated by a single mutational step, which cosegregate almost completely with the rDNA sites that identify M and S, consistent with previous estimates of strong reductions of gene flow between the two forms. We also report ten additional haplotypes stemming from the two major haplotypes, mostly present in single localities. The low levels of genetic variation found in this intronic region are discussed in light of a possible selective sweep. These findings offer additional elements to the ongoing debate on the amount of genetic differentiation and isolation between the two molecular forms and on their taxonomic status.
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