Resistance in Cucumis melo germplasm to Pseudoperonospora cubensis pathotypes

Lebeda, A.; Widrlechner, Mark; Stepankova, J.; Krskova, M.; Widrlechner, M. P.

Resistance in Cucumis melo germplasm to Pseudoperonospora cubensis pathotypes

File

137_Adv_Downy_Mildew_Res_3_157.pdf (596.83 KB)

Date

2007-01-01

Authors

Lebeda, A.

Widrlechner, Mark

Stepankova, J.

Krskova, M.

Widrlechner, M. P.

Authors

Person

Widrlechner, Mark

Associate Professor

Organizational Units

Organizational Unit

Agronomy

The Department of Agronomy seeks to teach the study of the farm-field, its crops, and its science and management. It originally consisted of three sub-departments to do this: Soils, Farm-Crops, and Agricultural Engineering (which became its own department in 1907). Today, the department teaches crop sciences and breeding, soil sciences, meteorology, agroecology, and biotechnology.

History
The Department of Agronomy was formed in 1902. From 1917 to 1935 it was known as the Department of Farm Crops and Soils.

Dates of Existence
1902–present

Historical Names

Department of Farm Crops and Soils (1917–1935)

Related Units

College of Agriculture and Life Sciences (parent college)

Organizational Unit

North Central Regional Plant Introduction Station

The North Central Regional Plant Introduction Station manages and provides plant genetic resources and associated information. As a result of working at the station, student employees should improve their professional skills related to communications, ethics, leadership, problem solving, technical agronomy, international awareness, and an appreciation of diversity.

Organizational Unit

Horticulture

The Department of Horticulture was originally concerned with landscaping, garden management and marketing, and fruit production and marketing. Today, it focuses on fruit and vegetable production; landscape design and installation; and golf-course design and management.

Department

AgronomyNorth Central Regional Plant Introduction StationHorticulture

Abstract

The Cucumis melo-Pseudoperonospora cubensis host-pathogen interaction is characterized by large variation in specificity. This report summarizes results obtained by laboratory screening of 52 C. melo accessions by 8 isolates of P cubensis. The isolates represent 8 different pathotypes with low, medium or high levels of pathogenicity. The reaction of C. melo accessions was evaluated on leaf discs removed from adult plants; sporulation intensity of P cubensis isolates was measured 6 to 14 days after inoculation. Relatively little variability in reaction patterns to P cubensis isolates was detected. The majority of C. melo accessions was highly susceptible to most of the P cubensis isolates studied. Altogether, 39 C. me lo accessions showed susceptibility to all 8 isolates. Relatively few accessions expressed incomplete resistance (8 accessions in 15 interactions with P cubensis isolates) or heterogenous reactions (8 accessions in 13 interactions). Only one accession (PI 315410) was found to be highly resistant to some P cubensis isolates. Among studied C. melo accessions, 14 different reaction patterns can be distinguished based on qualitative differences in response to this set of P cubensis isolates.

Comments

This is a proceeding from 2nd International Downy Mildews Symposium 3 (2007): 157.