EXPERIENCE IN PRE-BREEDING FOR QUANTITATIVE RESISTANCE TO LATE BLIGHT IN POTATO – A REVIEW

Authors

  • Ulrich Darsow retired collaborator of ZL Gross Luesewitz, belonging to JKI Quedlinburg, formaly BAZ

Keywords:

late blight, Phytophthora infestans, Solanum species, quantitative resistance, breeding strategy

Abstract

ABSTRACT: Pre-breeding for quantitative late blight resistance of potato is variety-breeding in principle, in which foliage and tuber blight resistance take precedence over all other traits; the resistance is utilized from diverse wild potato clones. A broad basis of very different pre-bree­ding clones is bred and retained as cross parents for crossing resistant x resistant. Progress in re-establishing of genome for cultural traits and preserving of high level of polygenic deter­mined late blight resistance at the same time requires consideration of all traits, combination breeding for these and minimi­zing of backcrosses. Results are given mainly for particular difficult combining with early maturity in long-day conditions and for applied selection system.

Vertical di­stan­ce of AUDPC to linear re­gression line with matu­rity is a correct criterion of true quantitative foliage-blight resistance in long-day condition. Slow progress in combining of polygenic determined traits is shown. Breeding strategy is explained and problems are dis­cussed, solutions are indicated. That pre-breeding is a very difficult bree­ding task, requiring hig­hest le­vel of special experience and a stable very long-term con­cept in public control. Saving of one third of current oomycide application is at least expected by new varieties.

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Published

2017-09-07

How to Cite

Darsow, U. (2017). EXPERIENCE IN PRE-BREEDING FOR QUANTITATIVE RESISTANCE TO LATE BLIGHT IN POTATO – A REVIEW. Potato Journal, 44(1). Retrieved from https://epubs.icar.org.in/index.php/PotatoJ/article/view/57608

Issue

Section

Review Article