Abstract
Several species ofFusarium cause both dry rot in storage and seedpiece decay in the field, which results in severe losses in all major potato-growing regions. In temperate climates twoFusarium species are the principle causes of tuber dry rot-F.sambucinum andF. coeruleum. Resistance toF. sambucinum was identified in cultivated and wildSolanum species. Relatively high levels of resistance exist in the following 2EBN species:S. boliviense (PI#’s 265860, 310975, 310974, 545853, 545889, 545964),S. gourlayi ssp.gourlayi (PI#’s 473344, 545865),S. microdontum (PI#’s 310979, 473171),S. sancta-rosae (PI# 498392),S. kurtzianum (PI# 472930),S. fendleri ssp.fendleri (PI# 262895),S. gandarillasii (PI#’s 265866, 283076),S. oplocense (PI# 498281) andS. vidaurrei (PI# 498332). The resistance is highly heritable but appears, at least in some of the species, to be associated with recessive alleles.
Resumen
Muchas especies deFusarium causan tanto pudrición seca durante el periodo de almacenamiento como deterioro del tubérculo semilla en el campo, lo cual da como resultado pérdidas severas en las más importantes regiones de cultivo de papa. En climas templados, son dos his principales especies deFusarium que causan la pudrición seca del tubérculo:F. sambucinum yF. coeruleum. Se ha identificado resistencia aF. sambucinum en especies cultivadas y silvestres deSolanum. Existen niveles de resistencia relativamente altos en las siguientes especies 2 EBN:S. boliviense (PI#’s 265860, 310975, 310974, 545853, 545889, 545964),S. gourlayi ssp.gourlayi (PI#’s 473344, 545865),S. microdontum (PI#’s 310979, 473171),S. sancta-rosae (PI#’s 265866, 283076),S. oplocense (PI# 498281) yS. vidaurrei (PI# 498332). La resistencia es altamente hereditaria, pero parece, al menos en algunas especies estar asociada con alelos recesivos.
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Lynch, D.R., Kawchuk, L.M., Chen, Q. et al. Resistance toFusarium sambucinum in wild and cultivatedSolanum species. Am. J. Pot Res 80, 353–358 (2003). https://doi.org/10.1007/BF02854246
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DOI: https://doi.org/10.1007/BF02854246