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<p>Understanding the genetic mechanisms underlying cold and drought tolerance in grapevines is essential for developing climate-resilient cultivars adapted to challenging environmental conditions. The strategic selection and systematic breeding of premium-quality, desiccation-resistant wine grape cultivars constitutes a fundamental approach for advancing the long-term viability and qualitative enhancement of the wine industry. In this study, we used the reciprocal crosses offspring of the cultivars of <i>Vitis vinifera</i> L. ‘Ecolly’ and ‘Dunkelfelder’ as experimental materials, and conducted genetic analysis and comprehensive evaluation of the total water content (TW), free water content (FW), bound water content (BW), bound water to free water ratio (B/F), and water loss ratio (WLR) of canes collected and analysed over three successive seasons. The content of FW, BW, and B/F of canes in vitro of the hybrid populations were continuously distributed and conformed with a skewed normal distribution. Among them, the content of TW shows a certain maternal dominance. The TW of canes in vitro was significantly positively correlated with the FW, as well as the BW and B/F. The FW and BW, as well as the FW and B/F showed significant negative correlation. The correlation and regression coefficients between the content of TW and WLR in 2023 and 2024 were 0.5664 and 0.6172, 0.3208 and 0.3809, respectively. 2106016 exhibited a high B/F and low WLR, 2006024 exhibited a high TW and high BW, and 2110026 exhibited a high B/F, low WLR, and high BW. These three lines should be the focus of attention for both cold- and drought- resistance.</p>

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Genetic analysis of water index in F1 hybrids between ‘Ecolly’ and ‘Dunkelfelder’ for cold- and drought- resistance breeding

  • 期刊论文

  • 发表日期：

    2026年7月10日

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  • Wang Zhilei,
  • Zhai Xiaoyu,
  • Xue Tingting,
  • Xu Guoqian,
  • Hu Yuannan,
  • Ozkan Kaya,
  • Zhang Junxiang

摘要

Understanding the genetic mechanisms underlying cold and drought tolerance in grapevines is essential for developing climate-resilient cultivars adapted to challenging environmental conditions. The strategic selection and systematic breeding of premium-quality, desiccation-resistant wine grape cultivars constitutes a fundamental approach for advancing the long-term viability and qualitative enhancement of the wine industry. In this study, we used the reciprocal crosses offspring of the cultivars of Vitis vinifera L. ‘Ecolly’ and ‘Dunkelfelder’ as experimental materials, and conducted genetic analysis and comprehensive evaluation of the total water content (TW), free water content (FW), bound water content (BW), bound water to free water ratio (B/F), and water loss ratio (WLR) of canes collected and analysed over three successive seasons. The content of FW, BW, and B/F of canes in vitro of the hybrid populations were continuously distributed and conformed with a skewed normal distribution. Among them, the content of TW shows a certain maternal dominance. The TW of canes in vitro was significantly positively correlated with the FW, as well as the BW and B/F. The FW and BW, as well as the FW and B/F showed significant negative correlation. The correlation and regression coefficients between the content of TW and WLR in 2023 and 2024 were 0.5664 and 0.6172, 0.3208 and 0.3809, respectively. 2106016 exhibited a high B/F and low WLR, 2006024 exhibited a high TW and high BW, and 2110026 exhibited a high B/F, low WLR, and high BW. These three lines should be the focus of attention for both cold- and drought- resistance.