Abstract
The implantation of a model of sustainable development for agriculture can happen with the contribution of the mandiocultura. But for this, culture needs to be strengthened. In vitro propagation is an instrument for this purpose. Micropropagation can provide growers with large quantities of vigorous and healthy cassava seedlings in a short time. The objective of this study was to evaluate the in vitro establishment of four varieties of cassava cultivated in the municipality of Colorado do Oeste, State of Rondônia, popularly known as Arara, Caturra, Cacau Vermelha and Roxinha. For that, an experiment was carried out in the Laboratory of In Vitro Cultivation at the Pole of Technological Innovation of the University of Cruz Alta (UNICRUZ), with a completely randomized design in a 4 x 2 factorial scheme, with 6 replications. The treatments consisted of explants grown in Murashige and Skoog (MS) medium without the presence of growth regulator and MS medium supplemented with of 6-benzylaminopurine (BAP). The results indicate that the average contamination percentage of the explants was 47.19%, differing among the varieties. The best growth response in culture media, in the multiple comparison of means (Scott-Knott's test, 5%), was obtained with MS medium without BAP addition, with significant difference between varieties. Under the conditions of this experiment, it was evidenced that micropropagation is a viable tool for obtaining varieties of interest, with desired phytosanitary qualities, with varietal and large scale authenticity.
Highlights
In order to be competitive, agribusiness must have a sustainable technological base which allows the generation of products at affordable prices for consumers; be linked to food safety; respect the environment; and conform to socially just standards (BRASIL, 2009)
The emergence of seedlings of varieties Arara, Caturra, Cacau Vermelha and Roxinha occurred in March
Of the 60 Caturra segments planted, 99 shoots were formed, 25 more than the total generated of 44 segments of Cacau Vermelha and 32 more than those produced by Roxinha
Summary
In order to be competitive, agribusiness must have a sustainable technological base which allows the generation of products at affordable prices for consumers; be linked to food safety; respect the environment; and conform to socially just standards (BRASIL, 2009). Cassava crop is an activity which can contribute to the implementation of this sustainable model, provided is not adopted as intensive monoculture, which would generate risks of outbreaks of pests and diseases and depletion of soil nutrients (SILVA; MARTINS, 2010). Perennial heliophilous plant, belonging to the family Euphorbiaceae, cassava (Manihot esculenta Crantz), among all crops, is supported by scientific studies such as higher calorie productivity, greater biological efficiency as a producer of energy and better adaptation to soil deficient in nutrients. Its root and by-products are consumed by more than 800 million people worldwide (NASSAR, 2006)
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