in order to study genetic diversity of aegilops tauschii populations, 188 populations of national plant gene bank collection of iran were evaluated for morphological traits according to ipgri descriptors in research station of national plant gene bank. moreover, 100 out of 188 populations were evaluated in research station of seed and plant improvement institute for resistance to yellow rust, p...

This paper presents theoretical and empirical results on the optimal search for genetic traits within a crop gene bank. Three specific questions are posed and answered, using data on the distributions of resistance genes and on the costs and benefits of search. First, we ask what is the optimal size of search for a trait of economic value? Second, what is the value of specialized knowledge abou...

Identifying and mobilizing useful genetic variation from germplasm banks to breeding programs is an important strategy for sustaining crop genetic improvement. The molecular diversity of 1,423 spring bread wheat accessions representing major global production environments was investigated using high quality genotyping-by-sequencing (GBS) loci, and gene-based markers for various adaptive and qua...

An efficient restriction barrier for methylated DNA in the actinomycete Amycolatopsis methanolica could be avoided by using a nonmethylating Escherichia coli strain for DNA isolations. The A. methanolica prephenate dehydratase gene was cloned from a gene bank in a pMEA300-derived shuttle vector in E. coli and characterized.

We identify a new natural coalescent structure, the seed-bank coalescent, which describes the gene genealogy of populations under the influence of a strong seedbank effect, where ‘dormant forms’ of individuals (such as seeds or spores) may jump a significant number of generations before joining the ‘active’ population. Mathematically, our seed-bank coalescent appears as scaling limit in a Wrigh...

A hybrid ColE1 plasmid from the Clarke-Carbon colony bank with a 7-kilobase insertion was found to encode the inducible lysyl-tRNA synthetase along with the catabolic enzyme lysine decarboxylase. The gene for the inducible synthetase, lysU, must lie within 0.3 min of the lysine decarboxylase gene, cadA, at 92 min on the Escherichia coli genetic map.

 Background: Rhinocerebral mucormycosis is a fatal infection typically affecting diabetic or immunosuppressed patients. In most cases, infection is caused by inhalation of fungal spores. Mortality rate of patients is very high (40-85%).  Case Presentation: In this study, three diabetic patients with rhinocerebral mucormycosis were presented. The etiologic agents of mucormycosis in two patien...

Background: Hepatocellular carcinoma (HCC), primary liver cancer, is a major health problem and the third most common cause of cancer-related deaths worldwide. Epigenetic modulations are essential for the maintenance of gene expression patterns in mammals. Disruption of these processes can lead to silenced gene and malignant cellular transformation. The current study was designed to compare the...