Mapping the H2 resistance effective against Globodera pallida pathotype Pa1 in tetraploid potato.

ABSTRACT:

Key message

The nematode resistance gene H2 was mapped to the distal end of chromosome 5 in tetraploid potato. The H2 resistance gene, introduced into cultivated potatoes from the wild diploid species Solanum multidissectum, confers a high level of resistance to the Pa1 pathotype of the potato cyst nematode Globodera pallida. A cross between tetraploid H2-containing breeding clone P55/7 and susceptible potato variety Picasso yielded an F1 population that segregated approximately 1:1 for the resistance phenotype, which is consistent with a single dominant gene in a simplex configuration. Using genome reduction methodologies RenSeq and GenSeq, the segregating F1 population enabled the genetic characterisation of the resistance through a bulked segregant analysis. A diagnostic RenSeq

SUBMITTER: Strachan SM 

PROVIDER: S-EPMC6449323 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature