DOI: 10.5061/dryad.4851qq0
title: Data from: Identification of resistance to bacterial leaf blight in the U.S. Department of Agriculture Collard Collection

description: Bacterial leaf blight incited by Pseudomonas cannabina pv. alisalensis
 (Pca) is a devastating disease with incidence reports worldwide and a wide
 host range capable of infecting all commercially valuable Brassica crops.
 With no chemical control options available, the most effective form of
 disease control is host plant resistance, but thus far resistant germplasm
 has only been identified in Brassica juncea L. (mustard greens). We report
 the first screening of Brassica oleracea L. var. viridis germplasm,
 including leafy green collard and collard-like accessions, for resistance
 to bacterial leaf blight by artificial inoculation of Pca in greenhouse
 trials. All commercial cultivars tested displayed an intermediate disease
 response resulting in leaf lesion development that renders the product
 unmarketable. Two sources of significant resistance were identified in the
 U.S. Department of Agriculture (USDA) viridis collection, which provides a
 valuable source of resistance alleles for collard cultivar development and
 introgression into other B. oleracea crops.
description: accession_infoAccession information for the PIs tested, including taxonomic classification, GRIN identifiers, common names, and geographic collection locations.stats_screenAThe USDA collard collection was screened for resistance to Pseudomonas cannabina pv alisalensis (bacterial leaf blight) through a series of five tests (A-E) using an augmented randomized complete block design. The stats files (screenA-E) report the results of an analysis of variance, Fisher's LSD, and line means for each test.stats_screenBThe USDA collard collection was screened for resistance to Pseudomonas cannabina pv alisalensis (bacterial leaf blight) through a series of five tests (A-E) using an augmented randomized complete block design. The stats files (screenA-E) report the results of an analysis of variance, Fisher's LSD, and line means for each test.stats_screenCThe USDA collard collection was screened for resistance to Pseudomonas cannabina pv alisalensis (bacterial leaf blight) through a series of five tests (A-E) using an augmented randomized complete block design. The stats files (screenA-E) report the results of an analysis of variance, Fisher's LSD, and line means for each test.stats_screenDThe USDA collard collection was screened for resistance to Pseudomonas cannabina pv alisalensis (bacterial leaf blight) through a series of five tests (A-E) using an augmented randomized complete block design. The stats files (screenA-E) report the results of an analysis of variance, Fisher's LSD, and line means for each test.stats_screenEThe USDA collard collection was screened for resistance to Pseudomonas cannabina pv alisalensis (bacterial leaf blight) through a series of five tests (A-E) using an augmented randomized complete block design. The stats files (screenA-E) report the results of an analysis of variance, Fisher's LSD, and line means for each test.stats_retestFPutatively resistant accessions from the initial screening were inoculated with Pseudomonas cannabina pv alisalensis for two additional greenhouse tests (retests F and H). The stats files (retestF, H, FH) report the results of an analysis of variance, Fisher's LSD, and line means for the retests separately and combined.stats_retestHPutatively resistant accessions from the initial screening were inoculated with Pseudomonas cannabina pv alisalensis for two additional greenhouse tests (retests F and H). The stats files (retestF, H, FH) report the results of an analysis of variance, Fisher's LSD, and line means for the retests separately and combined.stats_retestsFHPutatively resistant accessions from the initial screening were inoculated with Pseudomonas cannabina pv alisalensis for two additional greenhouse tests (retests F and H). The stats files (retestF, H, FH) report the results of an analysis of variance, Fisher's LSD, and line means for the retests separately and combined.