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New approaches in the development of soybean genotypes with an emphasis on the non-transgenic market and special characters


The development of a new cultivar involves several phases, ranging from population generation, selection processes and lineage evaluations. To meet a growing and demanding market of food-type soybean consumers, nutritional characteristics related to oil and seed protein quality, flavor, sugar contents and the presence of anti-nutritional factors are relevant. The absence of traits (external genes obtained with techniques used in biotechnology) has also been valued, as they result in less risk to health and value to farmers and rural workers in conventional and organic production systems. This project aims to develop soybean cultivars with special characters and with high productive potential when produced in a conventional system (non-transgenic). Cultivars with characters such as oil with high content of oleic fatty acid and low content of linolenic fatty acid, high content of total protein; food-like soy flavor and taste, resistant to stink bug complex and tolerant to Asian soybean rust. In the present stage, molecular markers of the SNPs type, already sought and developed in PIPE phase 1, will be validated in contrasting populations, with emphasis on those associated with the fatty acid contents of the oil in soybean seeds. Two segregating populations will be synthesized and the alleles carrying such characters will be followed with KASP PCR technology. The present project also intends to carry out the final tests of agronomic attributes of inbred soybean lines in five Brazilian soybean regions. Through preliminary tests conducted annually in Piracicaba and Jaboticabal, the superior strains will be selected to then compose the preliminary and final tests for the next year, following the system adopted by the crop genetic improvement program. The registration and protection, to guarantee the breeders the commercial and intellectual property rights of the cultivar, will include the tests of two agricultural years and the reaction to eleven pathogens and diseases in an accredited laboratory. It is understood that with the completion of the final tests of agronomic attributes of Santa Soja lines, the launch of cultivars will occur by the startup and the best balance of revenue and costs, with the increase of its commercial activities from the third year of activity. Later, with the help of molecular markers and genomic selection, other materials can also be selected, continuing the company's genetic improvement program. (AU)

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