Estrutura genética populacional de Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) utilizando marcadores microssatélites / Population genetic structure of Bemisia tabaci (Hemiptera: Aleyrodidae) utilizing microsatellite markers
Neotrop. entomol
;
40(2): 204-211, Mar.-Apr. 2011. graf, tab
Artículo
en Portugués
| LILACS
| ID: lil-586657
ABSTRACT
We aimed to characterize the population genetic structure within and among five 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 percent group consistency). The most similar populations were 1 and 2, with a 0.01 distance (65.3 percent). This is in agreement with their geographic origins and it was not consistent with host specificity. The results suggest considerable gene flow (7.3 percent) among all whitefly populations and indicate that a better understanding of the gene flow in populations of B. tabaci associated with different hosts is required for the management of this insect.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Repeticiones de Microsatélite
/
Hemípteros
Límite:
Animales
Idioma:
Portugués
Revista:
Neotrop. entomol
Asunto de la revista:
Biologia
/
ZOOLOGIA
Año:
2011
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
APTA/BR
/
Instituto Agronômico de Campinas/BR
/
USP/BR
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