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Pastos y Forrajes

Print version ISSN 0864-0394

Abstract

MACHADO, R. Collection of Jatropha curcas and its performance in nursery and establishment stages (Technical note). Pastos y Forrajes [online]. 2011, vol.34, n.2, pp.145-154. ISSN 0864-0394.

The objective of this work was to collect J. curcas material with adequate morphological characteristics for seed production, as well as to determine its performance in the nursery and establishment stages. In nursery variation was observed in the necessary days for the rooting of the propagules (14 to 35 days) and in seedling emergence (7 to 28 days). The propagule survival fluctuated between 73 and 100%; while starting from seed it was between 26,6 and 85,0%. The survival in the field stage varied between 45,4 and 93,3% in the provenances transferred by propagules, but in most it turned out to be lower than the one detected in the nursery. In the provenances directly sown variation was also detected in survival, but the number of plants emerged after 56 days was high. Under these conditions a similar variation pattern was maintained in the percentage of rooted plants and survival, but the effect of the stress caused by the transfer was evident. It is concluded that the age of the plants and the parts selected in the donor material, as well as seed quality, could have influenced the variation of the necessary days for rooting or emergence and the survival percentage. Using the procedure described for the collection of J. curcas is recommended, emphasizing the vegetative way, in order to have access to provenances with adequate characteristics for seed production and with it maintain the genotype of the collected materials.

Keywords : Plant collection; Jatropha curcas.

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