Abstract
Potatoes play a critical role in global food security, especially as the world population grows. The United States is a major producer and consumer of potatoes, necessitating effective pest and disease management to safeguard potato production. Potato cyst nematodes (PCN; Globodera pallida and G. rostochiensis) are economically important potato pests in regions where potatoes are grown. Globodera pallida is a specialized sedentary endoparasite with prolonged survival capability of up to 30 years in soil without a host and a potential to reduce tuber yields by up to 80%. Since the first detection of Globodera pallida in the United States occurred in Idaho in 2006, have been implemented phytosanitary regulations to contain and eradicate PCN to protect the United States potato industry. As PCN pose a considerable threat to potato crops in the United States. it is important to explore the challenges presented by Globodera pallida and identify opportunities for effective pathogen management to secure United States potato production. The predominant market class in the Western U.S. comprises russet-skinned potato used for processing. However, these potato varieties lack resistance to PCN, presenting a significant challenge in the development of commercially viable resistant potato varieties. Therefore, this study reports the characterization of the phenotypic resistance against the Idaho G. pallida pathotype Pa2/3 in a tetraploid russet-skinned potato population derived from resistant cultivar 'Eden' and susceptible cultivar ‘Western Russet’. Phenotypic evaluations over three years reveal promising results, with a subset of progeny exhibiting resistance traits related to the 'Eden' resistant parent. Moreover, this study provides genetic information on resistance against the Idaho G. pallida pathotype Pa2/3 population in russet-skinned potato, identifying quantitative trait loci (QTL) on chromosomes 4 and 6 associated with cyst and egg development. Of particular significance is the discovery of a novel QTL on chromosome 6, which offers valuable insights into resistance against G. pallida. This research marks the first report to map number of eggs per cyst for G. pallida in a tetraploid potato population.
The relatively few russet-skinned cultivars available with strong resistance to G. pallida is a significant limitation; thus, the potential contribution of the progeny selected as G. pallida resistant with the traits evaluated in this study will facilitate new information and may be beneficial for breeding programs.
Potatoes play a critical role in global food security, especially as the world population grows. The United States is a major producer and consumer of potatoes, necessitating effective pest and disease management to safeguard potato production. Potato cyst nematodes (PCN; Globodera pallida and G. rostochiensis) are economically important potato pests in regions where potatoes are grown. Globodera pallida is a specialized sedentary endoparasite with prolonged survival capability of up to 30 years in soil without a host and a potential to reduce tuber yields by up to 80%. Since the first detection of Globodera pallida in the United States occurred in Idaho in 2006, have been implemented phytosanitary regulations to contain and eradicate PCN to protect the United States potato industry. As PCN pose a considerable threat to potato crops in the United States. it is important to explore the challenges presented by Globodera pallida and identify opportunities for effective pathogen management to secure United States potato production.
The predominant market class in the Western U.S. comprises russet-skinned potato used for processing. However, these potato varieties lack resistance to PCN, presenting a significant challenge in the development of commercially viable resistant potato varieties. Therefore, this study reports the characterization of the phenotypic resistance against the Idaho G. pallida pathotype Pa2/3 in a tetraploid russet-skinned potato population derived from resistant cultivar 'Eden' and susceptible cultivar ‘Western Russet’. Phenotypic evaluations over three years reveal promising results, with a subset of progeny exhibiting resistance traits related to the 'Eden' resistant parent. Moreover, this study provides genetic information on resistance against the Idaho G. pallida pathotype Pa2/3 population in russet-skinned potato, identifying quantitative trait loci (QTL) on chromosomes 4 and 6 associated with cyst and egg development. Of particular significance is the discovery of a novel QTL on chromosome 6, which offers valuable insights into resistance against G. pallida. This research marks the first report to map number of eggs per cyst for G. pallida in a tetraploid potato population.
The relatively few russet-skinned cultivars available with strong resistance to G. pallida is a significant limitation; thus, the potential contribution of the progeny selected as G. pallida resistant with the traits evaluated in this study will facilitate new information and may be beneficial for breeding programs.