Abstract
Future maize genetic gains are dependent on the deployment of useful genetic diversity carried out in the public sector (Smith, 2007). In order for these gains to be significant and make impact the incorporation of unique and useful genetic diversity to breeding programs actively improving germplasm and developing cultivars is needed (Carena et al., 2009b). The most successful maize germplasm was Iowa Stiff Stalk Synthetic or BSSS (Sprague, 1946), a genetically broad-based population. Its successful spin-off line, B73 (Russell, 1972), was derived after five cycles of half-sib recurrent selection and several years of pedigree selection method of inbred line development with hybrid testing (Carena et al., 2009a). It generated billions of dollars and the benefits were shared before intellectual property was present. Even though the odds of developing successful public lines from genetically broad-based improved populations seem to be low, it only requires one to make significant impact (Hallauer and Carena, 2009).
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Hallauer, A.R., Filho, J.B.M., Carena, M.J. (2010). Germplasm. In: Quantitative Genetics in Maize Breeding. Handbook of Plant Breeding, vol 6. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-0766-0_11
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