title: Molecular characterization of Kluyveromyces marxianus strains isolated from Agave fourcroydes (Lem.) in Yucatan, Mexico.
abstract: The molecular characterization of 14 strains of Kluyveromyces marxianus isolated from Agave fourcroydes (Lem.) in Yucatan, Mexico, was performed by AP-PCR analysis, PCR-RFLP of 5.8S-ITS, and complete NTS regions. A sequence analysis of the D1/D2 domain of the 26S rDNA was also carried out in six selected strains. The AP-PCR approach had the highest discrimination power for the molecular characterization of new henequen K. marxianus strains. PCR-RFLP of 5.8S-ITS regions did not reveal polymorphisms in this group of strains. The restriction enzyme digestion analysis of NTS region enables the separation among strains which coincides with ascospore shape groups. The molecular tools used in this article may be useful to confirm a preliminary screen of yeasts isolated from henequen without the use of growth characteristics or morpho-physiological tests.
authors.affiliation: Laboratorio GeMBio, Centro de Investigación Científica de Yucatán, Calle 43 # 130, Col. Chuburná de Hidalgo, Merida, Yucatan, Mexico, daisypb@cicy.mx
authors.forename: Daisy
authors.initials: D
authors.lastname: Pérez-Brito
authors.forename: Raúl
authors.initials: R
authors.lastname: Tapia-Tussell
authors.forename: Andrés
authors.initials: A
authors.lastname: Quijano-Ramayo
authors.forename: Alfonso
authors.initials: A
authors.lastname: Larqué-Saavedra
authors.forename: Patricia
authors.initials: P
authors.lastname: Lappe
mesh_terms: D027882:Agave / Q000382:microbiology*; D004275:DNA, Ribosomal / Q000032:analysis; D007716:Kluyveromyces / Q000235:genetics* / Q000302:isolation & purification*; D008800:Mexico; D016133:Polymerase Chain Reaction / Q000379:methods; D012150:Polymorphism, Restriction Fragment Length; D017422:Sequence Analysis, DNA
chemical_list: D004275:DNA, Ribosomal