A cline in frequency of autosomal males is not associated with insecticide resistance in house fly (Diptera: Muscidae)
A cline in frequency of autosomal males is not associated with insecticide resistance in house fly (Diptera: Muscidae)
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DOI：
10.1603/0022-0493-98.1.171
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发表时间：
2005-02-01
影响因子：
2.2
通讯作者：
Scott, JG
中科院分区：
文献类型：
--
作者：
Hamm, RL;Shono, T;Scott, JG
研究了家蝇雄性性别决定因子（M）染色体定位的地理变异，美国东部的人口。我们发现一个强烈的倾斜趋势（29度41'纬度在佛罗里达到44度2'在缅因州），其中标准XYM男性的百分比增加，随着纬度的增加。在佛罗里达，100%的男性拥有第三常染色体上的M因子（IIIM）。北卡罗来纳州有20%的IIIM男性和2.35%的Y-M和IIIM。纽约的IIIM男性较少（4.35%）。来自缅因州的人群包含100%的XYM男性。在三种标准实验室敏感菌株中的两种中，所有雄性都在常染色体上携带M（“常染色体雄性”或Am）：CS（IIIM）和SRS（V-M）。四个现场收集的菌株的Inaderde生物测定导致我们得出结论，在广泛的杀虫剂的抗性与性别决定无关。例如，在所有四个现场收集的菌株中发现了对氯菊酯的高水平抗性（在诊断浓度下86-99%的存活率）。评价的其他五种杀虫剂在田间菌株中表现出不同程度的抗性。我们的结论是，在美国东部的家蝇种群中存在一个渐变群，南部100%的HIM雄性，北部完全是Y-M雄性，杀虫剂抗性不是影响M进化或连锁的关键因素。
Geographic variation in the chromosomal location of the male sex determining factor (M) was studied in four house fly, Musca domestica L., populations from the eastern United States. We found a strong clinal trend (29degrees 41' latitude in Florida to 44degrees 2' in Maine) in which the percentage of standard XYM males increased with increasing latitude. In Florida, 100% of the males possessed the M factor on the third autosome (IIIM). North Carolina had 20% IIIM males and 2.35% with both Y-M and IIIM. Fewer IIIM males were found in New York (4.35%). Populations from Maine contained 100% XYM males. In two of three standard laboratory-susceptible strains, all males carried M on an autosome ("autosomal males" or Am): CS (IIIM) and SRS (V-M). Insecticide bioassays of four field-collected strains led us to conclude that resistance is not correlated with sex determination over a broad range of insecticides. For example, high levels of resistance to permethrin (86-99% survival at a diagnostic concentration) were found in all four field-collected strains. The five other insecticides evaluated showed varying levels of resistance among field strains. We conclude that a cline is present in house fly populations from the eastern United States with 100% HIM males in the south and entirely Y-M males in the north and that insecticide resistance is not a key factor influencing the evolution or linkage of M.