Abstract

MORALES-FERNANDEZ, Sigfrido David et al. Potato development and yield in response to sowing immature tuber-seed. Rev. Chapingo Ser.Hortic [online]. 2011, vol.17, n.1, pp.67-75. ISSN 2007-4034.

Using mini-tubers for potato seed production under controlled conditions healthy, vigorous and productive plants can be obtained and the number of multiplications in the field can be reduced to achieve greater availability of seeds in the short term. The study was conducted to determine, the effect of sowing immature tuber-seed on the development and yield of potato under greenhouse conditions. Four degrees of tuber-seed maturity were evaluated: 22, 37, 51 and 63 days after tuber initiation (maturity of one, two, three and four, respectively), in Alpha, Atlantic, Mondial and Vivaldi varieties. A complete randomized block design was used and a statistical analysis as series of experiments was done. Duration of the biological cycle in degree days (DD) was longer in plants produced by tuber-seed with the lower degree of maturity (1230 DD). In the Alpha variety DD was1246 because in with tuber-seed maturity degree one, the vegetative stage (165 DD) and reproductive final stage (825 DD) were more prolonged. In addition, the Alpha variety produced more tubers per plant. The total weight of tubers per plant was similar in the tuber-seed with maturity degree one, two and four (249 to 273 g); however, among varieties, Mondial had the highest yield (316 g). The younger the tuber-seed used, the longer the biological cycle and the more the tubers per plant. Also, accumulated biomass of the aboveground part of the plant decreased.

Keywords : Solanum tuberosum L.; degree of seed maturity; varieties; phenology; yield; greenhouse.

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