The intensity of the drying process influencing the germinative potential of seeds of Coffea canephora harvested from genotypes of early maturation

Sheila Cristina Prucoli Posse, Wagner Nunes Rodrigues, Marcone Comério, Sara Dousseau Arantes, Robson Prucoli Posse, Abraão Carlos Verdin Filho, João Felipe de Brites Senra, Paulo Sérgio Volpi, José Altino Machado Filho


Several physical, chemical, and biological attributes of coffee seeds can be influenced by the drying and storage conditions. To propagate the recommended cultivars using seeds, it is often necessary to grow seedlings from genotypes of different maturation cycles, for which the mature seeds are only available in different moments throughout the year. This study aimed to test the germination of seeds of Coffea canephora Pierre ex A. Froehner from genotypes of early maturation, after being subjected to different periods of natural or artificial drying. For this end, two trials were developed, following split-plot (in time) scheme and completely randomized design, to study the moisture content of seed dried by two different drying process along 27 periods (between 0 and 320 hours), and the germinative potential, based on the germination speed index and proportion of germinated seeds after 30 days, of seeds dried by two drying process and 12 levels of seed moisture (between 50% and 8%). The results show that artificial drying at 35 ˚C removes seed moisture faster than the natural drying at 25 ˚C. Both drying methods can be used for decreasing seed moisture. However, the faster water loss negatively affects the germinative potential of seeds of genotypes of C. canephora of early maturation. The natural drying at 25 ˚C seems to have lesser impacts over the germination process, which may represent a good alternative if the seeds are stored at low levels of moisture.


Conservation; Propagation; Robusta coffee; Storage; Water content

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Direitos autorais 2022 Sheila Cristina Prucoli Posse, Wagner Nunes Rodrigues, Marcone Comério, Sara Dousseau Arantes, Robson Prucoli Posse, Abraão Carlos Verdin Filho, João Felipe de Brites Senra, Paulo Sérgio Volpi, José Altino Machado Filho

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