Record Details

Replication Data for: Global multi-environment resistance QTL for foliar late blight resistance in tetraploid potato with tropical adaptation

International Potato Center Dataverse OAI Archive

View Archive Info
 
 
Field Value
 
Title Replication Data for: Global multi-environment resistance QTL for foliar late blight resistance in tetraploid potato with tropical adaptation
 
Identifier https://doi.org/10.21223/5O3NT5
 
Creator Lindqvist-Kreuze, Hannele
Gastelo, Manuel
De Boeck, Bert
 
Publisher International Potato Center
 
Description The identification of environmentally stable and globally predictable resistance to potato late blight is challenged by the clonal and polyploid nature of the crop and the rapid evolution of the pathogen. A diversity panel of tetraploid potato germplasm bred for multiple resistance and quality traits was genotyped by genotyping by sequencing (GBS) and evaluated for late blight resistance in three countries where the International Potato Center (CIP) has established breeding work. Health-indexed, in vitro plants of 380 clones and varieties were distributed from CIP headquarters and tuber seed was produced centrally in Peru, China, and Ethiopia. Phenotypes were recorded following field exposure to local isolates of Phytophthora infestans. QTL explaining resistance in four experiments conducted across the three countries were identified in chromosome IX, and environment-specific QTL were found in chromosomes III, V, and X. Different genetic models were evaluated for prediction ability to identify best performing germplasm in each and all environments. The best prediction ability (0.868) was identified with the genomic best linear unbiased predictors (GBLUPs) when using the diploid marker data and QTL-linked markers as fixed effects. Genotypes with high levels of resistance in all environments were identified from the B3, LBHT, and B3-LTVR populations. The results show that many of the advanced clones bred in Peru for high levels of late blight resistance maintain their resistance in Ethiopia and China, suggesting that the centralized selection strategy has been largely successful.
 
Subject Agricultural Sciences
Potatoes
Phytophthora infestans
Yields
 
Language English
 
Contributor Admin, Dataverse
International Potato Center
CGIAR Research Program on Roots, Tubers and Bananas (RTB)