Identification of QTL for<i>Fusarium</i>Root Rot Resistance in Common Bean

Kamfwa, Kelvin; Mwala, M.; Okori, P.; Gibson, Paul; Mukankusi, Clare

doi:10.1080/15427528.2013.786775

Cited by 16 publications

(15 citation statements)

References 11 publications

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“…In this study, the parental line MLB‐49‐89A had high DS in the field, but relatively low DS and biomass reduction in the greenhouse experiment. Kamfwa et al (2013) concluded in their study that the gains from selection for resistant genotypes to FRR may increase when the selection is made in the greenhouse, which provides an environment with less variation. In this study, a strong environmental effect on FRR resistance was also observed by comparing the different phenotyping results from the greenhouse and field.…”

Section: Discussionmentioning

confidence: 99%

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confidence: 99%

“…Kamfwa et al (2013) investigated QTLs for FRR resistance with 62 F 4:5 RILs of MLB‐49‐89A (resistant) × K132 (also known as CAL96, susceptible) using 12 simple sequence repeat (SSR) markers. A significant QTL associated with FRR resistance was detected on Pv03 (Kamfwa et al, 2013). This population is especially valuable because it is derived from an intergene pool cross, and there has been limited success in transferring FRR resistance from the Middle American to the Andean genepool.…”

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QTL Analysis of Fusarium Root Rot Resistance in an Andean × Middle American Common Bean RIL Population

et al. 2018

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Fusarium root rot (FRR) is a soil‐borne disease that constrains common bean (Phaseolus vulgaris L.) production. Its causal pathogens include clade 2 members of the Fusarium solani (Mart.) Sacc. species complex. Here, we characterize common bean reaction to different Fusarium species and identify genomic regions associated with resistance. Four Fusarium species—F. brasiliense T. Aoki & O'Donnell, F. cuneirostrum O'Donnell & T. Aoki, F. solani sensu stricto, and F. oxysporum Schltdl. sensu lato—were tested for virulence on two bean genotypes, ‘CAL96’ (Andean) and ‘MLB‐49‐89A’ (Middle American), and virulence varied from mild to strong. The recombinant inbred line population of CAL96 × MLB‐49‐89A was phenotyped in a greenhouse for FRR resistance with the F. brasiliense isolate and screened in the field under natural FRR disease pressure. Quantitative trait locus (QTL) mapping was conducted on a map developed with 822 polymorphic single nucleotide polymorphism markers. Two QTLs associated with disease severity score in the greenhouse and field colocalized on chromosome Pv02 (R2 = 0.09 and 0.1, respectively). Other QTLs associated with root–shoot biomass, taproot diameter, lodging, and seed weight were also identified across nine chromosomes. Root and shoot weight QTLs from field and greenhouse screens also colocalized on Pv07 and Pv11. The FRR‐related QTLs identified in this study, especially on Pv02, are good candidates for marker‐assisted selection.

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Section: Discussionmentioning

confidence: 99%

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QTL Analysis of Fusarium Root Rot Resistance in an Andean × Middle American Common Bean RIL Population

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“…Ongom, Nkalubo, Gibson, Mukankusi, and Rubaihayo () confirmed that the PYAA19800 SCAR marker was strongly associated with Pythium ultimum resistance and not linked to Fusarium root rot resistance. Using simple sequence repeats (SSR) markers, Kamfwa, Mwala, Okori, Gibson, and Mukankusi () found a significant major QTL for resistance to Fusarium root rot in the resistant line MLB‐49‐89A. The study also found that the two markers PVBR87 and PVBR109 spanning the QTL are found on B3 of the common bean core map close to the region where resistance to root rots, anthracnose, common bacterial blight and bacterial brown spot have been previously mapped (Kamfwa et al., ).…”

Section: Genetics and Breeding For Resistance To Key Diseases In Africamentioning

confidence: 91%

“…Using simple sequence repeats (SSR) markers, Kamfwa, Mwala, Okori, Gibson, and Mukankusi () found a significant major QTL for resistance to Fusarium root rot in the resistant line MLB‐49‐89A. The study also found that the two markers PVBR87 and PVBR109 spanning the QTL are found on B3 of the common bean core map close to the region where resistance to root rots, anthracnose, common bacterial blight and bacterial brown spot have been previously mapped (Kamfwa et al., ). RAPD markers that are tightly linked to angular leaf spot resistance genes were identified and some successfully converted to SCAR markers (CIAT, ; Namayanja et al., ).…”

Section: Genetics and Breeding For Resistance To Key Diseases In Africamentioning

confidence: 91%

Genomics, genetics and breeding of common bean in Africa: A review of tropical legume project

et al. 2018

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Common bean (Phaseolus vulgaris L.) is an important legume crop worldwide. The International Centre for Tropical Agriculture (CIAT) and its national partners in Africa aim to overcome production constraints of common bean and address the food, nutrition needs and market demands through development of multitrait bean varieties. Breeding is guided by principles of market‐driven approaches to develop client‐demanded varieties. Germplasm accessions from especially two sister species, P. coccineus and P. acutifolius, have been utilized as sources of resistance to major production constraints and interspecific lines deployed. Elucidation of plant mechanisms governing pest and disease resistance, abiotic stress tolerance and grain nutritional quality guides the selection methods used by the breeders. Molecular markers are used to select for resistance to key diseases and insect pests. Efforts have been made to utilize modern genomic tools to increase scale, efficiency, accuracy and speed of breeding. Through gender‐responsive participatory variety selection, market‐demanded varieties have been released in several African countries. These new bean varieties are a key component of sustainable food systems in the tropics.

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