North Caucasian federal scientific center of horticulture, viticulture, winemaking
Author list of organization
List of articles written by the authors of the organization
-
Description
Industrial horticulture assumes the most effective use of the potential of varieties. One of the key factors determining the yield of garden plantings is the effectiveness of pollination. To obtain the maximum yield, it is necessary to ensure maximum pollination during the flowering period. For this reason, much attention has been paid to the selection of pollinators. Crab-apple forms are promising for use as pollinators, so this work was aimed at identifying the most common alleles of the self-incompatibility gene in the crab-forms using the molecular genetic method of analysis. The object of the study was 29 apple-tree creams and 3 elite selection forms. They carried out the molecular genetic identification of alleles S2 and S10, which are among the most common apple trees in the world gene pool. Allele S2 was identified in 16 samples (14 forms and 2 elite selection forms), while S10 allele in one sample (elite form 12/2-20 (24-28)). Data on the allelic composition of the S gene in the samples studied are of value for the formation of a genetic passport on the compatibility of the studied samples of apple with modern industrial varieties
-
Description
The pathogenic agent of apple scab disease, Venturia inaequalis (Cooke) Winter, causes significant damage to the industrial production of apples. Studying the pathogen in pure culture is important for solving the theoretical and practical issues of its biology. The sporulation ability of the Venturia inaequalis laboratory culture is an important diagnostic feature in morphological culture analysis, in the test for sensitivity to fungicides, when creating a collection inoculum for an artificial infection. We have studied the morphological features of conidiogenesis of pure V. inaequalis culture, such as the location of conidiogenic structures and their form. For the first time in the laboratory culture of the pathogen, sporulation in the thickness of agar on the substrate mycelium was demonstrated. Conidiogenesis proceeded according to the blastic-annellidic type. Depending on the location of the conidiogenic structures on the aerial or substrate mycelium, their morphology was different. Conidiogenic areas in the substrate mycelium could be observed with the unaided eye, in the form of hyphal grit, while they were conidia conglomerations in each annelid. Annellide had a curved shape. On the aerial mycelium, annelids were straight and always had only one conidium. Differences in the morphology of conidiogenic structures are supposed to be related to the physical conditions of the environment in which sporulation takes place. In the agar, each mature conidium remaining at the apex of the annelid interferes with the formation of the next one, which results in its bending. The fixed arrangement of conidiogenic structures and forming conidia in the thickness of agar allows the use of substrate sporification for model studies of the conidiogenesis process
-
Description
Professional apple gardening is bound to particular risks, of which is essential losses of a harvest because of diseases. An apple scab, the caused Venturia inaequalis (Cooke) G. Winter, brings the greatest loss. The main approach in monitoring of a scab of an apple-tree is creation of grades, steady against pathogen. In the present work we have carried out phytopathology testing of generations of the seedlings received from the free pollination of six forms of a crab of Malus orientalis from a collection MOS VIR (Maykop) characterized by a relative resistance to the apple scab in 2-3 classes of damage by long-term data. For infection we used inoculum, consisting both of natural population of a scab, and of strains of pathogen of various cultivars and geographical origin. When carrying out padding infection increase in force of an infectious background that can be bound to selection of the plants of biotypes of a fungus that are most adapted for genotypes was noted. It is recommended for precise elimination of unstable plants at selection at early stages of an ontogenesis to carry out more than one serial infection during the season. By results of the phytopathological testing, we highlighted three Malus orientalis forms from the six studied No. 17982, 17985 and 3080 the most perspective stability genes for an introgressiya in a cultural gene pool of an apple tree
-
GRAPE VARIETIES OF THE ANAPA AMPELOGRAPHIC COLLECTION AND THEIR USE IN BREEDING WORK
06.00.00 Agricultural sciences
DescriptionIn the world, huge work is being done to create global information banks of plant genetic resources. The need for conservation and rational use of genetic resources in modern conditions has become very relevant. Genetic collections are the basis for selection work: creating new varieties, replenishing the assortment with new, classic, introduced and native varieties, adapted to the natural (soil and climatic) conditions of the cultivation sites. In the Anapa ampelographic collection, 4911 varieties of various ecogeographical and genetic origin are represented, the use of which provides great opportunities for creating and breeding new varieties, their state testing and zoning. In the gene pool of the ampelographic collection, most varieties of V. vinifera L. grapes are represented by local honeycombs of different regions of the grape culture, and more than one fourth of varieties of V. vinifera L. are obtained from intraspecific crossings. Despite the value of local varieties of grapes, they do not always meet all the requirements of production. Therefore, to improve the local assortment, it is necessary to carry out selection - breeding new varieties of grapes. This article presents the long-term results of the work on the selection of varieties of table and technical directions in the Anapa ampelographic collection used for breeding. Also, the role of the genetic collection in the creation of new generation varieties by combinative selection is shown - as donors for creating new varieties of grapes. Dedicated varieties are the sources of valuable traits, which are given primary importance and are especially important for the viticulture of the Russian Federation