MORPHOMETRIC VARIABILITY IN THE CHAGAS-DISEASE VECTOR RHODNIUS-PROLIXUS
MORPHOMETRIC VARIABILITY IN THE CHAGAS-DISEASE VECTOR RHODNIUS-PROLIXUS
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DOI：
10.1266/jjg.69.233
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发表时间：
1994-06-01
期刊：
影响因子：
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通讯作者：
HARRY, M
中科院分区：
文献类型：
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作者：
HARRY, M
对委内瑞拉国内吸血蝽Rhodnius prolixus Stal 1897（Reduviidae，锥蝽亚科）的六个国内种群和被鉴定为R.robustus Larrousse 1927的森林种群的形态变异性进行了研究。这里通过对所研究的R.rodnius prolixus种群之间形态性状广泛变异的单因素和多因素分析提供了证据。无论测试何种地理或气候环境因素，都无法将任何因素保留在解释所观察到的形态变异性的选择性模型中。此外，结果未能支持形态马氏距离和地理距离之间的任何相关性。从现有数据推断出的这些种群之间的遗传关系比任何其他种群遗传模型更符合某些流行结构，这是由创始人效应引起的随机遗传漂变造成的。值得注意的是，R. prolixus 中这些形态性状的变异范围包括假定的 R.robustus 种群。因此，粗壮树的物种特异性状况，至少是当地研究的特鲁希略种群，受到质疑。此外，对其他三种Rhodnius近亲R. pictipes Stal 1872、R. nasutus Stal 1859和R.ignoreus Lent 1954进行的初步多因素分析证实了R. pictipes与所有其他物种的显着形态差异，并显示R. nasutus和R.ignoreus彼此之间以及与R. prolixus之间存在明显的形态差异。
Morphometric variability was studied in six domestic Venezuelan populations of the blood-sucking bug Rhodnius prolixus Stal 1897 (Reduviidae, Triatominae) and in a sylvatic population identified as R. robustus Larrousse 1927. Evidence is here provided by both uni- and multifactorial analyses of extensive variation of morphological traits between the R. In prolixus populations studied. Regardless the geographic or climatic environmental factor tested, none can be retained in a selective model accounting for the morphological variability observed. Moreover, the results failed to support any correlation between the morphological Mahalanobis' distances and geographical distances. The genetic relationships between these populations inferred from the present data, are more consistent with some demic structure, resulting from random genetic drift by founder effects, than with any alternative population genetic model. It is noteworthy that the range of variation of these morphological traits in R. prolixus includes the putative R. robustus population. Therefore, the species-specific status of R. robustus, at the very least the local Trujillo population studied, is questioned. In addition, a preliminary multifactorial analysis bearing on three other Rhodnius relatives, R. pictipes Stal 1872, R. nasutus Stal 1859 and R. neglectus Lent 1954, confirmed the marked morphological differentiation of R. pictipes from all other species and showed a clear morphological differentiation of R. nasutus and R. neglectus both from one another and from R. prolixus.