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Low genetic diversity in Melanaphis sacchari aphid populations at the worldwide scale.
Nibouche, Samuel; Fartek, Benjamin; Mississipi, Stelly; Delatte, Hélène; Reynaud, Bernard; Costet, Laurent.
Afiliação
  • Nibouche S; Cirad, UMR PVBMT, Saint-Pierre, La Réunion, France.
  • Fartek B; Cirad, UMR PVBMT, Saint-Pierre, La Réunion, France; Université de la Réunion, UMR PVBMT, Saint-Pierre, La Réunion, France.
  • Mississipi S; Cirad, UMR PVBMT, Saint-Pierre, La Réunion, France.
  • Delatte H; Cirad, UMR PVBMT, Saint-Pierre, La Réunion, France.
  • Reynaud B; Cirad, UMR PVBMT, Saint-Pierre, La Réunion, France.
  • Costet L; Cirad, UMR PVBMT, Saint-Pierre, La Réunion, France.
PLoS One ; 9(8): e106067, 2014.
Article em En | MEDLINE | ID: mdl-25148510
Numerous studies have examined the genetic diversity and genetic structure of invading species, with contrasting results concerning the relative roles of genetic diversity and phenotypic plasticity in the success of introduced populations. Increasing evidence shows that asexual lineages of aphids are able to occupy a wide geographical and ecological range of habitats despite low genetic diversity. The anholocyclic aphid Melanaphis sacchari is a pest of sugarcane and sorghum which originated in the old world, was introduced into the Americas, and is now distributed worldwide. Our purpose was to assess the genetic diversity and structuring of populations of this species according to host and locality. We used 10 microsatellite markers to genotype 1333 individuals (57 samples, 42 localities, 15 countries) collected mainly on sugarcane or sorghum. Five multilocus lineages (MLL) were defined, grouping multilocus genotypes (MLG) differing by only a few mutations or scoring errors. Analysis of a 658 bp sequence of mitochondrial COI gene on 96 individuals revealed five haplotypes, with a mean divergence of only 0.19 %. The distribution of MLL appeared to be strongly influenced by geography but not by host plant. Each of the five MLL grouped individuals from (A) Africa, (B) Australia, (C) South America, the Caribbean and the Indian Ocean including East Africa, (D) USA, and (E) China. The MLL A and C, with a wide geographic distribution, matched the definition of superclone. Among aphids, M. sacchari has one of the lowest known rates of genetic diversity for such a wide geographical distribution.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Afídeos / Variação Genética / Repetições de Microssatélites / Genética Populacional Limite: Animals País/Região como assunto: Africa / America do sul / Asia / Oceania Idioma: En Revista: PLoS One Assunto da revista: CIENCIA / MEDICINA Ano de publicação: 2014 Tipo de documento: Article País de afiliação: França País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Afídeos / Variação Genética / Repetições de Microssatélites / Genética Populacional Limite: Animals País/Região como assunto: Africa / America do sul / Asia / Oceania Idioma: En Revista: PLoS One Assunto da revista: CIENCIA / MEDICINA Ano de publicação: 2014 Tipo de documento: Article País de afiliação: França País de publicação: Estados Unidos