Genes Lr48 and Lr49 for hypersensitive adult plant leaf rust resistance in wheat (Triticum aestivum L.) |
| |
| Authors: | RG Saini M Kaur B Singh Shiwani Sharma GS Nanda SK Nayar AK Gupta S Nagarajan |
| |
| Institution: | (1) Department of Genetics and Biotechnology, Punjab Agricultural University, Ludhiana –, 141 004, India;(2) Department of Plant Breeding, Punjab Agricultural University, Ludhiana –, 141 004, India;(3) Department of Ophthalmology, Flinders University of South Australia, Adelaide, 5042, Australia;(4) Directorate of Wheat Research, Indian Council of Agricultural Research, Karnal, 132 001, India |
| |
| Abstract: | The genetic bases of leaf rust resistance in wheat (Triticum aestivum L.) line CSP44, selected from the Australian cultivar Condor, and Indian cultivar VL404, were studied. The reaction patterns
of CSP44 and VL404 against Indian races 12, 77, 77-1, 77-2, 77-3, 77-4, 77-5 and 108 were different from reaction patterns
shown by near-isogenic lines with known adult plant resistance (APR) genes, viz. Lr12, Lr13, Lr22b and Lr34. Although the reaction patterns of CSP44 and VL404 were similar to the near-isogenic line Tc+Lr22a, tests of allelism indicated absence of Lr22a in both CSP44 and VL404. On the basis of genetic studies, their resistances in field tests against race 77-5, the most virulent
race from the Indian sub-continent, were each ascribed to two genes. One of the two genes in each wheat was identified to
be the non-hypersensitive APR gene Lr34. The second APR genes in CSP44 and VL404 gave hypersensitive reaction types and were recessive and dominant, respectively.
The gene in CSP44 was designated Lr48and the gene in VL404, Lr49.
This revised version was published online in August 2006 with corrections to the Cover Date. |
| |
| Keywords: | adult plant resistance hypersensitive resistance non-hypersensitive resistance Puccinia recondita Triticum aestivum wheat |
| 本文献已被 SpringerLink 等数据库收录！ |
|
