ORIGINAL RESEARCH article
Front. Plant Sci.
Sec. Plant Breeding
This article is part of the Research TopicAdvances in Breeding for Quantitative Disease Resistance - Volume IIView all 5 articles
Mapping of Quantitative Trait Locus for resistance to anthracnose in a population derived from genotypes PI 527538 and Ervilha of common bean
Provisionally accepted
Kelvin Kamfwa1*
Mwiinga Mulube1
Swivia Hamabwe1
Kuwabo Kuwabo1Modreen Chinji1Mukuni Nkandela1Joseph Botha1Brian Mwense1Langa Tembo1Davies Lungu1Chikoti Mukuma2
Travis Parker3- 1University of Zambia, Lusaka, Zambia
- 2Zambia Agricultural Research Institute, Lusaka, Zambia
- 3University of California Davis, Davis, United States
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Anthracnose (ANT) caused by the fungus Colletotrichum lindemuthianum is a major disease of common bean (Phaseolus vulgaris L.). The objectives of this study were to: (i) characterize four isolates of C. lindemuthianum into races, (ii) identify QTL associated with resistance to these four races, and (iii) identify lines with pyramided resistance to the characterized races. The four isolates collected from the major-bean growing region of Zambia were characterized into races 6, 7, 81 and 294. This is the first time these four races are being reported in Zambia. These races were used to inoculate 220 F5:9 recombinant inbred lines (RILs) derived from a cross between the Andean common bean genotypes PI 527538 and Ervilha. Only two RILs were highly resistant to all four races. Six QTL were identified on chromosomes Pv01 (ANT1.1), Pv03 (ANT3.1), Pv04 (ANT4.1) and Pv10 (ANT10.1, ANT10.2 and ANT10.3), which conferred resistance to the four characterized races. The R2 of these QTL ranged 6.3-90.3%, suggesting that both major and minor effect loci controlled ANT resistance. Some of the identified QTL overlapped with previously reported QTL while others did not. A total of 31 disease resistance genes with NB-ARC-LRR and TIR-NBS-LRR domains were identified as candidate genes for ANT1.1 and ANT10.2. The two RILs with superior resistance to all four races represent a valuable genetic resource to improve the yellow beans for ANT resistance while QTL analysis has provided valuable information to develop a marker-assisted selection strategy for ANT resistance in the yellow bean market class.
Keywords: Colletotrichum lindemuthianum, quantitative trait locus, candidate genes, recombinant inbred lines, race
Received: 27 Aug 2025; Accepted: 10 Nov 2025.
Copyright: © 2025 Kamfwa, Mulube, Hamabwe, Kuwabo, Chinji, Nkandela, Botha, Mwense, Tembo, Lungu, Mukuma and Parker. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Kelvin Kamfwa, kelvinkamfwa@gmail.com
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