Resumo

ESTRADA PRADO, Wilfredo; LESCAY BATISTA, Elio; ALVAREZ FONSECA, Alexander  e  MACEO RAMOS, Yariuska C. Drought response of onion (Allium cepa L.) varieties using different selection indexes. cultrop [online]. 2015, vol.36, n.3, pp. 75-81. ISSN 1819-4087.

The water deficit tolerance of five onion varieties was evaluated in an experiment carried out between the years 2009-2010 at “Jorge Dimitrov” Agricultural Research Institute, Bayamo municipality, Granma province, Cuba. Three soil moisture levels were evaluated: 100, 75 and 50 %. 15 treatments were used, distributed in a completely randomized design and 30 plants were selected at random from each treatment where indexes were evaluated: Yield losses (YL), geometrical mean productivity (GMP), mean productivity (MP), relative efficiency index (REI), drought tolerant index (DTI), stability yield index (SYI), susceptibility drought index (SDI), harmonic mean (HM) and tolerance (TOL). The results showed that the soil water deficits evaluated have a significative (p=0,05), where Grano-2000 _F1 showed the most tolerant water deficit variety, while H-222 was the most susceptible variety. All the drought indexes evaluated have a high contribution on the total phenotypic variability

Palavras-chave : Allium cepa; drought susceptibility; drought tolerant; varieties.

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