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Germplasm Release: Three Potato Clones Incorporating Combined Resistances to Early Blight from S. palustre and Late Blight from S. bulbocastanum into a S. tuberosum Background

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Abstract

Three clones in a segregating population derived from a cross between the disease resistant parents +297 and K41 are being released as germplasm with resistance to both early blight, caused by Alternaria solani, and late blight, caused by Phytophthora infestans. The source of resistance to early blight in +297 is the wild species S. palustre and late blight resistance in K41 is conferred by the RB gene from S. bulbocastanum. These clones, named BR3, BR5, and BR85 (BR for Blight Resistant), yield well at a temperate zone latitude. In addition to containing heritable resistance to both early and late blights, these clones possess multiple other desirable agronomic traits, are fertile, and readily cross to cultivars.

Resumen

Se están liberando tres clones de una población segregante derivada de una cruza entre los padres resistentes +297 y K41 como germoplasma con resistencia a tanto el tizón temprano, causado por Alternaria solani, como al tizón tardío, causado por Phytophthora infestans. La fuente de resistencia para tizón temprano en +297 es la especie silvestre S. palustre y la resistencia al tizón tardío en K41 es conferida por el gen RB de S. bulbocastanum. Estos clones, nombrados como BR3, BR5 y BR85 (BR por resistencia al tizón), rinden bien a una latitud de zona templada. Además de contener la resistencia heredable a ambos tizones, temprano y tardío, estos clones poseen otras múltiples características agronómicas deseables, son fértiles y de fácil cruzamiento con variedades.

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Acknowledgments

We would like to thank Dr. John Helgeson for providing resistant parents for this cross. Also thanks to Dr. Brian Perkins for determining the glycoalkaloid content of released clones. Funding was provided by the Wisconsin Potato and Vegetable Growers Association. Salary for A.M. was provided by a Monsanto fellowship.

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Correspondence to Dennis Halterman.

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Meier, A., Jansky, S. & Halterman, D. Germplasm Release: Three Potato Clones Incorporating Combined Resistances to Early Blight from S. palustre and Late Blight from S. bulbocastanum into a S. tuberosum Background. Am. J. Potato Res. 92, 410–416 (2015). https://doi.org/10.1007/s12230-015-9451-y

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