Yield and postharvest storability of onion genotypes grown in lowland

To determine yield of six onion genotypes grown in lowland, and postharvest room storability of cured bulbs, two experiments were performed at the Federal University of Santa Maria in 1995 and 1996. Yields of marketable bulbs were over 20t/ha for all genotypes under study. Yields of ‘Crioula’ genotypes were the highest, quantitatively and qualitatively. Marketable bulb yields, culls, average bulb weight and yields of bulb grades 2 and 3 were significantly different. Up to 100 days under storage, bulb weight loss was approximately 15% for all genotypes. No significant interaction between genotypes and storage period was found. Losses in bulb weight and bulb number correlated with storage period. Bulb number and bulb weight correlated negatively with percentages of bulb weight loss and bulb number loss.

onion; genotypes; yield; postharvest storability