Improvement of Persian Walnut Assortment in the Northern Caucasus Zone

Lugovskoy, A.P.; Artykhova, Larisa Viktorovna; Balapanov, Ilnur Malikovich

doi:10.30679/2219-5335-2019-2-56-35-50

Cited by 2 publications

(1 citation statement)

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“…Despite the ongoing breeding work on walnuts in the south of Russia (Lugovskoi, Murzinova, 2010;Khokhlov, Baskakova, 2015;Suprun et al, 2016;Lugovskoy, Balapanov, 2018) and the availability of research results on the study of collections of varieties using molecular genetic methods (Balapanov et al, 2019), one should still note the limitations of studies aimed at analyzing the level of genetic diversity and identifying the genetic structure of the gene pool in the South of Russia, including the Crimea and the North Caucasus. The Nikitsky Botanical Gardens (NBG-NSC) is one of the leading scientific organizations in the Russian Federation that performs breeding work on walnuts.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive agrobiological assessment and analysis of genetic relationships of promising walnut varieties of the Nikitsky Botanical Gardens

Plugatar,

Suprun,

Khokhlov

et al. 2023

Vestn. VOGiS

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Walnut is an important horticultural crop, the production of which ranks second among all nut crops. Despite the significant demand in the domestic market in Russia, the industrial production of walnut fruits in Russia is currently underdeveloped. At the same time, there is a need to update the assortment with new highly productive varieties adapted to local agro-climatic conditions and having high quality nuts that are competitive at the world level. An important issue for the successful implementation of breeding programs is a comprehensive study of the gene pool. In this regard, within the framework of the study, the task was to evaluate promising varieties from the collection of the walnut gene pool of the Nikitsky Botanical Gardens and analyze genetic relationships based on microsatellite genotyping. On the basis of the performed phenotypic assessment, the study sample, which included 31 varieties, was divided into several groups according to the main phenotypic traits, such as frost and drought resistance, the start of the growing season, the ripening period, the weight and type of flowering, the weight of the fruit, and the thickness of the endocarp. Varieties with economically valuable traits that can be recommended as promising as initial parental forms in breeding work for resistance to abiotic stress factors have been identified, as well as varieties with increased productivity and large fruit sizes. Based on the analysis of eight SSR markers (WGA001, WGA376, WGA069, WGA276, WGA009, WGA202, WGA089 and WGA054), an analysis of the level of genetic diversity was performed and genetic relationships were established in the studied sample of varieties. Six (for WGA089) to eleven (for WGA276) alleles per locus have been identified. A total of 70 alleles were identified for the eight DNA markers used, with an average value of 8.75. Analysis of SSR genotyping data using Bayesian analysis established the presence of two main groups of genotypes. Taking into account the fact that all the studied varieties are selections from local seed populations in different regions of the Crimean Peninsula, the revealed level of polymorphism may indirectly reflect the level of genetic diversity of the local walnut populations. Furthermore, the presence of two genetically distant groups indicates the presence of two independently formed pools of the autochthonous gene pool of the species Juglans regia L. on the Crimean Peninsula

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Section: Introductionmentioning

confidence: 99%

Comprehensive agrobiological assessment and analysis of genetic relationships of promising walnut varieties of the Nikitsky Botanical Gardens

Plugatar,

Suprun,

Khokhlov

et al. 2023

Vestn. VOGiS

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Aspects of introduction and prospects for the use of Juglans L. representatives in Central Russia

Emelyanova,

Tsoy,

Masalova

2024

Trudy po prikladnoy botanike, genetike i selektsii

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Background. Human health security is an important goal of contemporary society. The combination of beneficial properties in Juglans nuts makes them one of the most valuable plant genetic resources, capable of ensuring a wholesome supply of nutrients required by the human organism. The Persian walnut (Juglans regia L.) has the largest set of useful agronomic traits among the representatives of the genus, except for winter hardiness. Its cultivation in areas farther to the north from the conventional area of distribution for commercial walnut orchards would be possible if Juglans spp. with higher resistance to unfavorable climate conditions could be involved. Interspecies hybridization can be used to increase winter hardiness in walnut. The objective of this study was to analyze the gene pool of Juglans L. and screen its bioresource collection at the arboretum of the Russian Research Institute of Fruit Crop Breeding (VNIISPK) in the context of useful agronomic indicators promising for plant breeding and landscaping. Materials and methods. The study was carried out in the VNIISPK arboretum (Orel Province, 53°00’N, 36°00’E) where 7 Juglans spp. are maintained. Results and conclusion. The results of the screening highlighted J. mandshurica Maxim., J. cordiformis Maxim., and Vekhov’s hybrid (J. cinerea L. × J. mandshurica Maxim.) as the most resistant to adverse environmental effects. They are recommended for use in plant breeding and landscaping programs under the conditions of Central Russia. A seedling of cv. ‘Astakhovsky’ demonstrated the best agronomic indicators among the Persian walnut (J. regia) genotypes. It can be used by breeders to develop new cultivars with useful agronomic traits for the environmental conditions of the region of study.

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Improvement of Persian Walnut Assortment in the Northern Caucasus Zone

Cited by 2 publications

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Comprehensive agrobiological assessment and analysis of genetic relationships of promising walnut varieties of the Nikitsky Botanical Gardens

Comprehensive agrobiological assessment and analysis of genetic relationships of promising walnut varieties of the Nikitsky Botanical Gardens

Aspects of introduction and prospects for the use of Juglans L. representatives in Central Russia

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