background: downy mildew caused by plasmopara halstedii is one of the most devastating diseases of sunflower worldwide. so far several dominant resistance genes designated as pl have been identified and their molecular markers linked to these genes are available. however, no information on the resistance genes is available in iranian lines. objective: in this study, the presence of three map-ba...

exploitation of the full potential of any hybrid requires the possessing of genetically high-purity seeds. commercial soybean hybrids have been developed using a cytoplasmic male sterility (cms) system. in order to avoid reduction in yield caused by using low-purity seeds, development of a simple, rapid, and accurate method for hybrid purity assessment is of great essence and significance. ther...

the genetic structure of the genus alburnus is not well known and the phylogenetic relationships among its species are uncertain. in the present study, simple sequence repeats (ssrs or microsatellites) were used to evaluate genetic diversity and genetic differentiation between alburnus mossulensis heckel, 1843 from kashgan river in lorestan province and alburnus caeruleus heckel, 1843 from gama...

mahaleb (prunus mahalab l.) is used as a rootstock for cherries in iran and many other countries. in this research, rapd markers were used to determine the genetic diversity among eight genotypes of mahaleb evaluated in two separate research grardens in karaj, iran. these genotypes are used as mother plants for seed production. totally 40 random primers were examined for pcr reactions on the te...

out of fifty-two iranian nonaflatoxigenic strains of aspergillus flavus, which were collected from various substrates (soil and kernel) and sources (peanut, corn and pistachio), fifteen representatives were selected according to their different geographical origins (six provinces: guilan and golestan, ardebil, fars, kerman and semnan) and vegetative compatibility groups (vcgs, ir1 to ir15) for ...

An equivalence relation E on a standard Borel space is hyperfinite if E is the increasing union of countably many Borel equivalence relations En where all En-equivalence classs are finite. In this article we establish the following theorem: if a countable abelian group acts on a standard Borel space in a Borel manner then the orbit equivalence relation is hyperfinite. The proof uses constructio...

Precise investigation of genetic diversity by means of novel molecular tools has made it possible to identify the superior genotypes among various male and female pistachio populations. Cytogenetic studies have shed light on the possible presence of distinct sex chromosomes in male and female genotypes. In this study, 22 start codon targeted (SCoT) primers were used to investigate the genetic d...