Abstract
Vitis adenoclada Hand.-Mazz is a special wild grape resource that is often confused with Vitis heyneana Roem. & Schult in research or production practice, and there are few comprehensive studies on this species in recent years. “Gui Heizhenzhu No. 3” (GH3), as a new germplasm of V. adenoclada found in Guangxi, China, has many advantages, such as good quality and strong adaptability. In this paper, an attempt was made to introduce the breeding process of GH3, including a brief description of its botanical characteristics and its cultivation and management techniques in karst rocky desertification mountains. Meanwhile, its quality-related parameters were evaluated by widely targeted metabolomic analysis. This study indicated that GH3 had the typical botanical characteristics of V. adenoclada, but with larger fruit and a higher sugar content compared to wild or other V. adenoclada grape varieties. Metabolomic study of the target variety showed that glucose and citric acid were the main sugar and acid components in fully ripened berries. Moreover, cyanidin-3-O-glucoside presented as the characteristic anthocyanin. In addition, B-ring dihydroxylation was more active than trihydroxylation in the GH3 berry. Several of its botanical and quality characteristics highlight the unique genetic background of this variety. Thus, it has an important guiding significance and a scientific theoretical basis for identifying, exploiting, and utilizing East Asian wild grape resources.
Highlights
China is one of the countries of origin of the grape genus Vitis and is one of the most abundant germplasm resources in the world
Our results showed that 9 kaempferols, 13 quercetins, and 4 myricetins were detected in Gui Heizhenzhu No. 3” (GH3) berries in the harvest stage
The breeding process, botanical characteristics, cultivation and management techniques, and quality-related parameters of GH3 were investigated in this study to evaluate its characteristics as a new V. adenoclada
Summary
China is one of the countries of origin of the grape genus Vitis and is one of the most abundant germplasm resources in the world. The genetic basis of cultivated grapes is narrow, and the wild grape relative species contains a large number of excellent genes urgently needed by cultivated grapes, making it an important gene pool to broaden the genetic basis of cultivated grapes [1]. East Asian wild grape species contain many varieties, which present strong stress resistance and good agronomic traits. Cross-breeding with cultivated grape varieties using wild resources with close relatives can obtain excellent table grape varieties, resistant resources, or wine grape varieties. V. adenoclada is a unique wild grape species in China, classified as an East Asian species and widely distributed in. & Schult, which created significant inconvenience to the field of research on the utilization of wild grape resources, especially in terms of hybridization [3] V. adenoclada was mistaken as V. heyneana Roem. & Schult, which created significant inconvenience to the field of research on the utilization of wild grape resources, especially in terms of hybridization [3]
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