Bailly Xavier, Béna Gilles, Lenief Vanina, Lajudie Philippe de, Avarre Jean-Christophe. (2006). Development of a lab-made microarray for analyzing the genetic diversity of nitrogen fixing symbionts Sinorhizobium meliloti and Sinorhizobium medicae. Journal of Microbiological Methods, 67 (1), p. 114-124. ISSN 0167-7012.
Titre du document
Development of a lab-made microarray for analyzing the genetic diversity of nitrogen fixing symbionts Sinorhizobium meliloti and Sinorhizobium medicae
Bailly Xavier, Béna Gilles, Lenief Vanina, Lajudie Philippe de, Avarre Jean-Christophe
Source
Journal of Microbiological Methods, 2006,
67 (1), p. 114-124 ISSN 0167-7012
Some bacterial species, like nitrogen-fixing Sinorhizobium that interact with Medicago plants, are prone to frequent horizontal gene transfers. Investigation of their genetic structure requires to study polymorphism patterns at many loci. Although DNA microarrays represent a method of choice for high throughput analysis of polymorphisms, this technology yet remains an expensive and heavy approach, thus depriving most of research groups from this powerful tool. In an attempt to overcome this limitation, we have developed a simple genotyping procedure by DNA microarrays, and have evaluated its ability to characterize a Sinorhizobium population. Thirty 18- to 24-mer oligonucleotide probes were designed to target the most frequent mutations in three polymorphic loci of Sinorhizobium meliloti and S. medicae. Probe hybridization efficiency was compared on two spotting surfaces: nylon membranes and epoxy-coated glass slides. Epoxy-coated glass slides revealed more sensitive than nylon membranes and allowed discrimination of single mismatches. Using this procedure, an uncharacterized population consisting of 33 S. meliloti/S. medicae isolates was successfully genotyped. (c) 2006 Elsevier B.V. All rights reserved.
