Abstract
Genetic variation for oxalate content was studied in a Rheum genotype collection. Phenotypic variation of oxalate in rhubarb petioles ranged from 0. 24-2.99 %FW among 572 genotypes. The lowest level in a more thorough examination of selected low-oxalate genotypes from the collection was 0.28 %FW. A low heritability and a long interval between generations are negative factors for future breeding of low-oxalate rhubarb cultivars. Low-oxalate genotypes are, however, characterized by vigorous growth and normal levels of titratable acidity.

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