A second gene for resistance to race 4 of Fusarium wilt in chickpea and linkage with a RAPD marker |
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| Authors: | A Tullu WJ Kaiser JM Kraft FJ Muehlbauer |
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| Institution: | (1) Department of Crop and Soil Sciences, Washington State University, Pullman, Washington, 99164–6434, U.S.A;(2) U.S. Department of Agriculture, Agricultural Research Service, Prosser, Washington, 99350–9687, U.S.A |
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| Abstract: | Fusarium wilt caused by Fusarium oxysporum Schlechtend.: Fr f. sp. ciceris (Padwick) Matuo & Sato is a devastating disease of chickpea. The current study was conducted to determine the inheritance
of the gene(s) for resistance to race 4 of fusarium wilt and to identify linked RAPD markers using an early wilting line,
JG-62, as a susceptible parent. Genetic analysis was performed on the F1s, F2s and F3 families from the cross of JG-62 × Surutato-77. The F3 families were inoculated with a spore suspension of the race 4 wilt pathogen and the results were used to infer the genotypes
of the parent F2 plants. Results indicated that two independent genes controlled resistance to race 4. Linkage analysis of candidate RAPD
marker, CS-27700, and the inferred F2 phenotypic data showed that this marker locus is linked to one of the resistance genes. Allelism indicated that the two resistance
sources, Surutato-77 and WR-315, shared common alleles for resistance and the two susceptible genotypes, C-104 and JG-62,
carried alleles for susceptibility. The PCR-based marker, CS-27700, was previously reported to be linked to the gene for resistance to race 1 in a different population which suggested that
the genes for resistance to races 1 and 4 are in close proximity in the Cicer genome.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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| Keywords: | Cicer arietinum L diseaseresistance early and late wilting genetic marker |
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