Identification of novel QTLs for seedling and adult plant leaf rust resistance in a wheat doubled haploid population

C. G. Chu, T. L. Friesen, S. S. Xu, J. D. Faris, J. A. Kolmer

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

Pyramiding of genes that confer partial resistance is a method for developing wheat (Triticum aestivum L.) cultivars with durable resistance to leaf rust caused by Puccinia triticina. In this research, a doubled haploid population derived from the cross between the synthetic hexaploid wheat (SHW) (×Aegilotriticum spp.) line TA4152-60 and the North Dakota breeding line ND495 was used for identifying genes conferring partial resistance to leaf rust in both the adult plant and seedling stages. Five QTLs located on chromosome arms 3AL, 3BL, 4DL, 5BL and 6BL were associated with adult plant resistance with the latter four representing novel leaf rust resistance QTLs. Resistance effects of the 4DL QTL were contributed by ND495 and the effects of the other QTLs were contributed by the SHW line. The QTL on chromosome arm 3AL had large effects and also conferred seedling resistance to leaf rust races MJBJ, TDBG and MFPS. The other major QTL, which was on chromosome arm 3BL, conferred seedling resistance to race MFPS and was involved in a significant interaction with a locus on chromosome arm 5DS. The QTLs and the associated molecular markers identified in this research can be used to develop wheat cultivars with potentially durable leaf rust resistance.

Original languageEnglish (US)
Pages (from-to)263-269
Number of pages7
JournalTheoretical and Applied Genetics
Volume119
Issue number2
DOIs
StatePublished - Jul 2009

Bibliographical note

Funding Information:
This research was supported by USDA-ARS CRIS’ 3640-21220-020-00D and 5442-22000-043-00D.

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