DNA markers linked to the R (2) rust resistance gene in sunflower (Helianthus annuus L.) facilitate anticipatory breeding for this disease variant

Lawson, W.R., Jan, C.C., Shatte, T., Smith, L., Kong, G.A. and Kochman, J.K. (2011) DNA markers linked to the R (2) rust resistance gene in sunflower (Helianthus annuus L.) facilitate anticipatory breeding for this disease variant. Molecular Breeding, 28 4: 569-576. doi:10.1007/s11032-010-9506-1


Author Lawson, W.R.
Jan, C.C.
Shatte, T.
Smith, L.
Kong, G.A.
Kochman, J.K.
Title DNA markers linked to the R (2) rust resistance gene in sunflower (Helianthus annuus L.) facilitate anticipatory breeding for this disease variant
Journal name Molecular Breeding   Check publisher's open access policy
ISSN 1380-3743
1572-9788
Publication date 2011-12
Year available 2010
Sub-type Article (original research)
DOI 10.1007/s11032-010-9506-1
Volume 28
Issue 4
Start page 569
End page 576
Total pages 8
Place of publication Dordrecht, Netherlands
Publisher Springer
Collection year 2012
Language eng
Formatted abstract
Pre-emptive breeding for host disease resistance is an effective strategy for combating and managing devastating incursions of plant pathogens. Comprehensive, long-term studies have revealed that virulence to the R 2 sunflower (Helianthus annuus L.) rust resistance gene in the line MC29 does not exist in the Australian rust (Puccinia helianthi) population. We report in this study the identification of molecular markers linked to this gene. The three simple sequence repeat (SSR) markers ORS795, ORS882, and ORS938 were linked in coupling to the gene, while the SSR marker ORS333 was linked in repulsion. Reliable selection for homozygous-resistant individuals was efficient when the three markers, ORS795, ORS882, and ORS333, were used in combination. Phenotyping for this resistance gene is not possible in Australia without introducing a quarantinable race of the pathogen. Therefore, the availability of reliable and heritable DNA-based markers will enable the efficient deployment of this gene, permitting a more effective strategy for generating sustainable commercial cultivars containing this rust resistance gene.
Keyword Helianthus annuus L.
Sunflower
Rust resistance
Pre-emptive breeding
SSR markers
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online: 9 October 2010.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Agriculture and Food Sciences
 
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