PJB-2024-275
SURVEY, SELECTION, AND STUDY OF PROMISING GENOTYPES OF SEA BUCKTHORN (HIPPOPHAE RHAMNOIDES L.) IN BORABAI NATIONAL PARK
Mukan Gauhar
Abstract
This study aimed to conduct an ecological and biological survey of natural populations of sea buckthorn and select promising genotypes in the Borabai National Park of the Republic of Kazakhstan. The selection was based on the pomological and antioxidant properties of six genotypes (Hr-01, Hr-02, Hr-03, Hr-04, Hr-05, and Hr-06). The results showed that the highest fruit weight was found in genotype Hr-1 (21.7±0.8 g), and the lowest fruit weight was found in genotype Hr-5 (9.3 g±0.09). Fruit height ranged from 5.6 to 8.4 mm, fruit diameter ranged from 4.1 to 6.1 mm, and fruit weight ranged from 9.3 g to 21.7 g. The highest content of total polyphenols was found in forms Hr-04, Hr-02, and Hr-05 (13.60; 12.82; 12.68 GAE/g, respectively). According to the results of DPPH and FRAP tests, four sea buckthorn genotypes had high antioxidant activity (Hr-06, Hr-05, Hr-02, Hr-01). The results showed that there is a difference between the pomological and chemical characteristics of genotypes, and the most suitable genotype depends largely on the preferred characteristics of sea buckthorn. Based on the results obtained, it can be concluded that genotypes Hr-01, Hr-02, and Hr-06 are superior in terms of pomological characteristics, while genotypes Hr-05, Hr-06 are more promising when the preferred characteristics are antioxidant activity and total polyphenol content. In general, the selected genotypes Hr-01, Hr-02, Hr-04, Hr-05, and Hr-06 were found to have pronounced pomological and antioxidant characteristics, indicating further study of them under ex-situ conditions for health promotion and in agricultural practice.
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