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Estrutura genética populacional de Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) utilizando marcadores microssatélites

2011; Springer Nature; Volume: 40; Issue: 2 Linguagem: Inglês

10.1590/s1519-566x2011000200008

1678-8052

GE do Valle, M. I. Zucchi, NS Stabellini, André Luiz Lourenção, JB Pinheiro,

Insect and Pesticide Research

Hemiptera: Aleyrodidae) U lizing Microsatellite MarkersWe aimed to characterize the population genetic structure within and among ive Bemisia tabaci (Gennadius) populations collected from different host plants and geographic regions by using microssatelites as a molecular marker.Each population was represented by 19 specimens.The host plants and geographic origins of these populations were described as follows: Pop 1: Squash -Barreiras (BA); Pop 2: Cotton -Barreiras (BA); Pop 3: Soybean -Campinas (SP); Pop 4: Tomato -Cruz das Almas (BA); and Pop 5: Soybean -Rondonópolis (MT).Six polymorphic loci were observed, which discriminated 31 different alleles in the studied populations, with a mean number of alleles per population of 3.30 (2.67 -4.00).Using Fisher's Exact test, it was observed that at least three populations were in Hardy-Weinberg equilibrium for most of the studied loci (six).The dendrogram (UPGMA) separated populations into groups mainly related to the geographic origin of the samples.Only population 5 differed from the others at a 0.15 distance (74.5% group consistency).The most similar populations were 1 and 2, with a 0.01 distance (65.3%).This is in agreement with their geographic origins and it was not consistent with host speci icity.The results suggest considerable gene low (7.3%) among all white ly populations and indicate that a better understanding of the gene low in populations of B. tabaci associated with different hosts is required for the management of this insect.