Genetic improvement of lucerne for anthracnose (Colletotrichum trifolii) resistance

Irwin, J. A. G., Aitken, K. S., Mackie, J. M. and Musial, J. M. (2006) Genetic improvement of lucerne for anthracnose (Colletotrichum trifolii) resistance. Australasian Plant Pathology, 35 6: 573-579. doi:10.1071/AP06059

Author Irwin, J. A. G.
Aitken, K. S.
Mackie, J. M.
Musial, J. M.
Title Genetic improvement of lucerne for anthracnose (Colletotrichum trifolii) resistance
Journal name Australasian Plant Pathology   Check publisher's open access policy
ISSN 0815-3191
Publication date 2006
Sub-type Article (original research)
DOI 10.1071/AP06059
Volume 35
Issue 6
Start page 573
End page 579
Total pages 7
Place of publication Collingwood
Publisher Csiro Publishing
Collection year 2006
Language eng
Subject C1
270207 Quantitative Genetics
620199 Field crops not elsewhere classified
Abstract Anthracnose, caused by Colletotrichum trifolii, is one of the most serious diseases influencing lucerne persistence and productivity in eastern Australia. The disease is largely controlled by plant resistance; however, new pathotypes of C. trifolii have developed in Australia, seriously limiting the productive life of susceptible cultivars. This paper describes an incompletely recessive and quantitatively inherited resistance to C. trifolii identified in a clone (W116) from cv. Sequel. S-1, F-1, F-2 and backcross populations of W116 and D (highly susceptible clone) were studied for their reaction to C. trifolii race 1. Resistance was found to be quantitatively inherited, and quantitative trait loci associated with resistance and susceptibility were identified in a backcross population (D x W116) x D using random amplified polymorphic DNA and amplified fragment length polymorphic markers. A multi-locus region on linkage group 4 was found to contribute significantly to the resistance phenotype. The application of DNA markers to allow exploitation of this quantitatively inherited resistance in lucerne breeding is discussed.
Keyword Aflp
Medicago Sativa
Plant Sciences
Alfalfa Strain Crosses
Medicago-sativa L.
Linkage Map
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

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Created: Wed, 15 Aug 2007, 08:47:24 EST