Abstract
Vines of Ramsey, Villard blanc, Sultana and progenies from three crosses involving these cultivars as parents, were surveyed for chloride accumulation in the vineyard. Experimental vines of Ramsey, Sultana, and Ramsey x Sultana hybrids were also grown under glasshouse conditions in solution cultures containing sodium chloride. Under vineyard conditions the three cultivars accumulated chloride in the order Sultana > Villard blanc > Ramsey. Petiole chloride analysis revealed a large variation in chloride accumulation between individuals within each progeny in the vineyard. This variation was reduced under glasshouse conditions for Ramsey x Sultana hybrids. Chloride accumulation in the glasshouse did not correlate with that of the vineyard for this group of hybrids. About 25% of the hybrids did not follow the ranking obtained from vineyard data. However, from the hybrids that did reproduce vineyard rankings, it was possible to identify new genotypes that consistently accumulated less chloride in shoots than vines of Ramsey. There was no evidence, from either vineyard or glasshouse data, for chloride accumulation being a function of vigor. The variation in chloride accumulation between hybrids was continuous in both vineyard and glasshouse. This suggests that control of chloride uptake and/or transport to shoots is a transmissible character displaying a quantitative inheritance. Segregation patterns from vineyard data suggested evidence for dominance in Ramsey x Villard blanc and Ramsey x Sultana progenies, although glasshouse data for the latter group of hybrids did not support this. There was evidence for transgressive segregation, and the results support the value for breeding for salt-exclusion in grapevines.
- Received May 1984.
- Copyright 1985 by the American Society for Enology and Viticulture
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