ArticleSpringerPlus2014
fAFLP analysis of Brazilian Bacillus thuringiensis isolates.
Article in SpringerPlus, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Identification of Bacillus thuringiensis Strains for the Management of Lepidopteran Pests.Neotropical entomology · 2021Article
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2 authors.
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Abstract
A total of 65 Bacillus thuringiensis (Bt) isolates were subjected to analysis of genetic relationship using fAFLP (fluorescent Fragment Length Polymorphism), in order to determine the genetic diversity within a group of Bt strains. 26 strains from different subspecies were identified as it follows: 9 kindly provided by the USDA (United States Department of Agriculture), 9 kindly provided by the Institute Pasteur and eight from Embrapa Maize and Sorghum Bt Collection, and 39 strains with no subspecies information also from Embrapa's Bt Collection. DNA sample was double digested with restriction enzymes EcoRI and MseI, and the fragments were linked to adapters. Selective amplification reactions were performed using five primer combinations and the amplified fragments were separated by gel electrophoresis on an ABI377 sequencer. Genetic distances were obtained by the complement of the Jaccard coefficient and the groups were performed by the UPGMA method. Five primer combinations generated 495 scorable fragments and 483 were found to be polymorphic. Out of 26 subspecies, strains 344 and T09 (B. thuringiensis subsp. tolworthi) showed the highest similarity (15%), while isolates HD3 B. thuringiensis subsp finitimus and T24 B. thuringiensis subsp neoleonensis were the most genetically distant (92%). B. thuringiensis isolates with no subspecies identification, found in samples from Goiás State showed higher similarity forming a group with an average distance of 6%, and the closest subspecies to this group was B. thuringiensis subsp thuringiensis (HD2) with 52% of similarity. This similarity may be due to the fact that these organism exchange genetic material by conjugation, and it is relatively common to have evolutionary characteristics of their ancestors.
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