Half-smooth tongue sole (Cynoglossus semilaevis) is an important aquaculture flatfish in China. Cytogenetic analysis has revealed that its sex determination system is female heterogametic (ZZ/ZW). The W chromosome is morphologically larger and has been considered evolutionarily younger than any other chromosome in the set. However, the genetic origin and evolution process of this neo-chromosome...

bipolaris oryzae causes rice brown spot disease which reduces rice yield with substantial global impact. streptomycetes isolated from rice fields of guilan province, iran, showed antifungal activity against the tested pathogen. from five active streptomyces spp. isolates, isolate g showed high antagonistic activity. to determine its taxonomical identity, its colonies characterized morphological...

Black yeasts morphologically identified as Exophiala cf. spinifera were re-analyzed on the basis of morphology, nutritional physiology and ITS rDNA sequencing data. Ribosomal small subunit (SSU) DNA sequence data confirmed that strains belonged to a clade containing the ex-type strain of E. spinifera. Variation in the Internal Transcribed Spacer (ITS) region of the rDNA was studied within this ...

conclusions the widespread distribution of l. major parasites in human suggests not only t. indica was the main reservoir but also other rodents and mammalian hosts might be the reservoir hosts of zcl in the region. molecular and phylogenetic analyses confirmed the strength of haplotype variation maintaining the circulation of leishmania species in their reservoir hosts. results leishmania majo...

abstract isolates of rhizoctonia spp., obtained from sugar beet roots and crowns with dry rot symptoms that had been collected from various sugar beet production regions in khorasan razavi province during 2008 and 2009, were investigated in this research. characterization by conventional techniques and molecular methods using species-specific primers was carried out. results showed that from 36...

The application of nuclear rDNA ITS sequences in plant phylogeny and evolution analysis was discussed in this paper. Nuclear rDNA is an important nuclear gene fragment, which had been widely used in phylogenetic studies. The internal transcribed spacer of nuclear rDNA was divided into ITS1 and ITS2 by 5.8S rDNA. The length of ITS1 ranges from 165 bp to 298 bp in angiosperms, and the length of I...