Identification of Tetraploid Potato Clones with Good Processing Quality among Genotypes with Reduced Zebra Chip Disease
- PDF / 1,420,729 Bytes
- 15 Pages / 595.276 x 790.866 pts Page_size
- 67 Downloads / 204 Views
Identification of Tetraploid Potato Clones with Good Processing Quality among Genotypes with Reduced Zebra Chip Disease Symptomatology Samuel J. Vigue 1 & Douglas C. Scheuring 1 & Jeffrey W. Koym 2 & Charles M. Rush 3 & Fekede Workneh 3 & Cecilia Tamborindeguy 4 & J. Creighton Miller Jr 1 & David S. Douches 5 & Richard G. Novy 6 & M. Isabel Vales 1 Accepted: 15 October 2020 # The Potato Association of America 2020
Abstract Zebra chip (ZC) disease caused by the bacterium ‘Candidatus Liberibacter solanacearum’ (Lso) and vectored by the potato psyllid (Bactericera cockerelli Šulc.) inflicts significant yield and quality losses in potato. Potato plants infected with Lso produce tubers with an internal brown stripe pattern that is unacceptable to the potato processing industry. Potato varieties tolerant of ZC disease could reduce yield and quality losses caused by the disease, as well as diminish insecticide usage to control potato psyllids. Tetraploid potato clones selected from breeding programs in the US were screened in Texas under both greenhouse and field conditions. Chipping quality in tubers harvested from plants infested with Lso-infected psyllids and those harvested from from non-infested plants were compared, and tuber symptoms associated with ZC disease were evaluated. Clones showing good chipping quality and promising ZC tolerance in the greenhouse and first field trials were independently tested in a second field trial. Clones of the A07781 and TX12484 families consistently showed good processing quality and ZC tolerance over multiple evaluations. These findings indicate that good processing clones with tolerance to ZC disease are available. These clones could be used by potato breeding programs as parents and could also be used to study the genetics of tolerance to ZC disease. Resumen La enfermedad de la papa rayada (ZC por sus siglas en inglés), causada por la bacteria “Candidatus liberibacter solanacearum” (Lso) y transmitida por el psílido de la papa (Bactericera cockerelli Šulc.), infringe pérdidas significativas en rendimiento y calidad en papa. Las plantas infectadas con Lso producen tubérculos con un patrón interno de rayas cafés que es inaceptable para la industria del procesamiento de la papa. Las variedades tolerantes a la enfermedad de ZC pudieran reducir las pérdidas en rendimiento y calidad causadas por la enfermedad, así como la disminución del uso de insecticidas para controlar a los psílidos de la papa. Se evaluaron en Texas clones tetraploides de papa seleccionados de programas de mejoramiento en los EUA, bajo condiciones tanto de invernadero como de campo. Se comparó la calidad de fritura en tubérculos cosechados de plantas infestadas con psílidos infectados con Lso con las cosechadas de plantas no infestadas, y se evaluaron los síntomas de tubérculos asociados con la enfermedad de ZC. Los clones que mostraron buena calidad de fritura y con tolerancia prometedora a ZC en el invernadero y en los ´primeros ensayos de campo se probaron de manera independiente en un segundo ensayo de campo.
Data Loading...
