Seedling performance-based methodologies for assessing melon seed physiological quality

Abstract

While numerous methods exist for assessing seed physiological quality, seedling performance-based approaches often lack species-specific adaptations. This study evaluated the efficacy of various seedling performance methodologies for assessing physiological quality in yellow Valenciano-type melon (Cucumis melo L.) seed lots. Four seed lots underwent comprehensive testing, including: water content, germination, first count, electrical conductivity, root dry mass, hypocotyl/primary root length, greenhouse emergence, and multiple germination/emergence velocity indices (original and corrected forms). Strong correlations emerged between velocity indices and laboratory tests, though these relationships disappeared under field conditions. Our findings demonstrate that seedling-based assessments effectively distinguish melon seed vigor in controlled laboratory environments, but lose predictive validity in field applications due to environmental interactions. These results highlight the need for species-specific vigor protocols and caution against extrapolating laboratory results to field performance predictions.