Abstract
Screening in the seedling and first clonal generations is a potentially cost-effective and efficient way to incorporate resistance to important diseases and reduce large breeding populations to manageable size. In practice, however, early screening is often limited by the need to maintain clean seedstocks of promising clones, unreliability of single-plant evaluations, associations of disease resistance with undesirable horticultural characteristics, or the higher priority placed on traits other than disease resistance. Possible methods to overcome these limitations are discussed. Examples of early generation screening for resistance to several diseases are given.
Resumen
Tamizar en el estado de plántula y durante la primera generación clonal es un método eficiente y potencialmente económico para incorporar resistencia a importantes enfermedades y reducir poblaciones muy grandes a tamaños manejables. En práctica, sin embargo, el tamizado temprano es a menudo limitado por la necesidad de mantener limpios stocks de semilla de clones promisorios, por la poca confiabilidad de evaluar una planta, por las asociaciones de resistencia y características agronómicas no deseables, o por la mayor prioridad de colocar primero otras características que la resistencia a enfermedades. Posibles métodos para solucionar estas limitaciones se discuten Ejemplos de tamizados en generaciones tempranas para resistencia a varias enfermedades son dados.
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Paper No. 730. Department of Plant Breeding and Biometry, Cornell University, Ithaca, NY 14853.
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Plaisted, R.L., Thurston, H.D., Brodie, B.B. et al. Selecting for resistance to diseases in early generations. American Potato Journal 61, 395–403 (1984). https://doi.org/10.1007/BF02852809
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DOI: https://doi.org/10.1007/BF02852809