نتایج جستجو برای: genetic variability
تعداد نتایج: 768742 فیلتر نتایج به سال:
objective: the aim of this study was to estimate genetic variability and phonetic relationships of 50 isolates of p. sojae from iran. methods: during 2005–2007, 142 isolates of phytophthora sojae were collected from soil samples and diseased soybean plants from lorestan, mazandaran, golestan and ardabil provinces. races of the isolates were determined. dna of p. sojae fifty isolates was amplifi...
background: the tan spot disease of wheat caused by pyrenophera tritici-repentis has become a major disease in most wheat growing areas worldwide. objectives: here we used issr and rapd markers to study the genetic diversity of 34 p. tritici-repentis isolates collected from north of iran.materials and methods: the leaves having the typical symptoms of tan spot disease were collected and after f...
By its frequency, colorectal cancer (CRC) has become a serious public health problem. BAT25 marker is included in the panel of five markers dedicated to the diagnosis of CCR microsatellite instability. The objective of this study was to evaluate the polymorphism and genetic diversity of the BAT25 marker in CRC cases in Senegal. This prospective study was performed on 22 CRC patients. After DNA ...
In order to study of variability, relationship among traits, direct and indirect effects of traits influencing grain yield, 18 lines and cultivars of bread wheat were evaluated in a randomized complete block design with four replications during 2009-2012 cropping seasons. Coefficients of genotypic and phenotypic variability showed that lines had high genetic variation for peduncle length, grain...
Identification and classification of genetic source are important in plant breeding and genetic diversity. In order to evaluate genetic diversity of 48 Facultative wheat genotypes belong to north of IRAN, an experiment was done using 10 ISSR primers in the genetic laboratory of Gonbad Kavous University. Out of 62 produced fragments, 41 fragments were polymorphic. The number of polymorphic bands...
the citrus leafminer, phyllocnistis citrella stainton (lepidoptera: gracillariidae) is a major invasive pest of citrus in tunisia. in order to help the implementation of an efficient integrated management strategy, it was essential to assess the genetic diversity and population structure of the pest. for this purpose, random-amplified polymorphic dna-polymerase chain reaction (rapd-pcr) was app...
Background: The tan spot disease of wheat caused by Pyrenophera tritici-repentis has become a major disease in most wheat growing areas worldwide. Objectives: Here we used ISSR and RAPD markers to study the genetic diversity of 34 P. tritici-repentis isolates collected from North of Iran. Materials and Methods: The leaves having the typical symptoms of tan spot disease were collected and after...
one of the most important and elusive diseases of grapevine is esca disease. esca is a complex disease that comprises a combination of symptoms caused by various fungi including growth retardation, decrease in productivity and decline of the plant and usually affecting adult plants (8 to 10 years and older). the purpose of this research was to study the genetic variations of fungal agents assoc...
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