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Horticultura Brasileira

versão impressa ISSN 0102-0536

Resumo

FLORI, José Egídio  e  RESENDE, Geraldo Milanez de. Productivity of heat tolerant potato genotypes in two planting times in São Francisco Valley, Northeast of Brazil. Hortic. Bras. [online]. 2000, vol.18, n.2, pp.122-125. ISSN 0102-0536.  http://dx.doi.org/10.1590/S0102-05362000000200009.

The experiments were carried out at the Bebedouro Experimental Field of Embrapa Semi-Àrid Research Center in Petrolina, Brazil, to evaluate different heat tolerant potato genotypes under two climatic conditions. The experimental design was of randomized complete blocks with seven genotypes (LT-9, 301251-1, 311320-1, 301217-1, 301159-1, Serrana x DTO-33 and cv. Baraka) and four replications. Under hot climatic condition (28°C) the genotype LT-9 showed the highest commercial yield (10.3 t/ha), followed by the other treatments that didn't show statistical differences in relation to each other, except the genotype Serrana x DTO-33 which showed the lowest commercial yield (2.7 t/ha). Under favorable condition (23°C), the commercial yield varied from 17.5 to 23.3 t/ha, whereas the genotype 301251-1 showed the highest yield (23.3 t/ha) but there were no statistical differences between the different treatments. The results indicated that the genotypes LT-9, 301251-1, 311320-1 and 301217-1 could be cultivated during the hot season and the genotypes 311251-1, 301217-1 and 311320-1 could be cultivated under favorable conditions as an alternative to the Baraka variety. However more investigation is needed.

Palavras-chave : Solanum tuberosum; yield; adaptation.

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