Phenotypic and Genotypic Features of Wild Forms of Kuban Grapes

Abstract

The article presents the results of scientific research consisting in finding wild-growing forms of the genus Vitis L. and studying their ecological-biological, phenotypic and genotypic features. The purpose of the work is to attract particularly valuable samples for economically useful traits to selection as new donors of resistance to various abiotic and biotic stress factors. The research was carried out on the territory of the state nature Reserve “Utrish” of Krasnodar Territory in 2021 using traditional and modern methods: route reconnaissance (expedition), geobotanical, ampelographic, analytical. It was found that the shape (openness), cobwebby pubescence and the degree of anthocyanin coloration of the tip of the young shoot in the studied populations of wild grapes are among the most variable morphological features. According to the method [15], the shape of the tip of the young shoot varies in this case from slightly open to completely open. The cobwebby pubescence of the crown of a young shoot in wild grape plants along a wide gap varies from medium (3 points) to thick (4 points). The discovered and described wild-growing forms of grapes Sh1-Sh5 go through all phases of development in full – from budding to grape ripening. At the time of the research, the samples Sh1-Sh5 visually had no damage from the phytopathogenic microflora. This is confirmed by laboratory studies. As a result of microbiological analysis, single saprophytic bacteria were found. Colonies of fungi and bacteria similar in phenotype to pathogenic ones were not found. At the same time, Sh1-Sh5 samples can be asymptomatic sources of viruses that can cause significant economic losses. Determination of the presence of 7 economically important viral pathogens of grapes in samples Sh1-Sh5 showed that samples Sh1, Sh2, Sh3, Sh5 are free of viral diseases. According to the results of the studies, the GPGV virus (Grapevine Pinot gris virus trichovirus) was detected only in the Sh4 sample.