E. Yu. Vlasova

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Morphological and symbiotic traits were studied in local endemic forms of the pea originating from Egypt, Syria, Afghanistan, and Palestine. A number of endemic forms exceeded the regionalized Druzhnaya cultivar of the fodder pea in productivity of the seeds in field and greenhouse experiments. In order to improve nodulation and nitrogen fixation, endemic(More)
Experiments on the effect of genotypic environment on the expression of the nod4 gene, responsible for supernodulation in pea, were performed. The genotypic background was found to affect the manifestation of both major symbiosis-related traits (number of nitrogen-fixing bacterial nodules and nitrogenase activity) and productivity-related traits (stem(More)
The results of long-term studies on the symbiogenetics and selection of leguminous cultures on the example of the Pisum sativum L. pea were summarized. Using the method of chemical and radiation mutagenesis, a collection of symbiotic mutants was created and genetically studied on different pea varieties. Two types of superand hypernodulating mutants were(More)
Symbiotic nitrogen fixation characteristic of legumes and the nodule bacteria Rhizobium is the major source of unpolluted biological nitrogen. Analysis of the genetic control of symbiotic nitrogen fixation showed that the macrosymbiont genome plays an important role in this system. The plant supplies the products of photosynthesis to nodules, and these(More)
Eight symbiotic mutants of pea (Pisum sativum L.) induced by chemical mutagenesis have been studied by the vegetative graft method in a “stem/root” manner. It has been found that symbiotic traits are controlled by the root in nonnodulating mutants K20a and K1005m, mutants with ineffective nodules K287 and K1a, and supernodulating mutants K10a and K12a. In(More)
Phenogenetic studies of four symbiotic hypernodulating mutants of pea (Pisum sativum L.) induced from seeds of cultivar Rodno by chemical mutagen EMS were conducted. All mutants have improved symbiotic traits, i.e., an increased number of root nitrogen fixating nodules and high activity of nitrogenase. Symbiotic traits were shown to be inherited dominantly.(More)
Morphological (plant height and vegetative biomass amount) and symbiotic (number of nodules and nitrogenase activity) traits of six symbiotic pea mutants and the original cultivar Rondo were studied at different vegetation periods. Of the mutants studied, one (K10a) was supernodular and the remaining five (K1a, K2a, K5a, K7a, and K27a) were hypemodular.(More)
This article presents the results of long-term experimental studies on symbiogenetics and breeding of macrosymbionts in a system of legume-rhizobial symbiosis with the pea (Pisum sativum L.) as an example. The collection of pea symbiotic mutants was created and genetically studied. The new symbiotic genes were identified and localized on a Pisum chromosome(More)
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