Resistance levels in Coffea arabica to Gibberella xylarioides and distribution pattern of the disease

Graaff, N. A. van der; Pieters, Romuald

doi:10.1007/bf01976299

Cited by 15 publications

(4 citation statements)

References 2 publications

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“…We know from our previous studies that the different diseases have different niches in relation to various environmental and management variables (Zewdie et al, 2020(Zewdie et al, , 2021. Here, we show that additional variation in the incidence of the fungal diseases across the There are also indications of a genetic component for resistance to other diseases than coffee berry disease, for example, coffee wilt disease (Pieters & van der Graaff, 1980;Van der Graaff & Pieters, 1978) and coffee leaf rust (Barka et al, 2020;Eskes, 1983;Hindorf & Omondi, 2011;Ribas et al, 2011;Silva et al, 2006). Studies that link disease dynamics to genetic variation in coffee are limited in this landscape.…”

Section: Variation In Fungal Diseases In Relation To Genetic Composit...mentioning

confidence: 64%

“…The three other fungal diseases (coffee leaf rust, coffee wilt disease and Armillaria root rot) also showed a genetic signal in how their incidences varied across the landscape, even though the relationships were weak compared to the relationship between genetic composition and coffee berry disease incidence. There are also indications of a genetic component for resistance to other diseases than coffee berry disease, for example, coffee wilt disease (Pieters & van der Graaff, 1980; Van der Graaff & Pieters, 1978) and coffee leaf rust (Barka et al, 2020; Eskes, 1983; Hindorf & Omondi, 2011; Ribas et al, 2011; Silva et al, 2006). Studies that link disease dynamics to genetic variation in coffee are limited in this landscape.…”

Section: Discussionmentioning

confidence: 99%

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Genetic composition and diversity of Arabica coffee in the crop’s centre of origin and its impact on four major fungal diseases

et al. 2022

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Conventional wisdom states that genetic variation reduces disease levels in plant populations.Nevertheless, crop species have been subject to a gradual loss of genetic variation through selection for specific traits during breeding, thereby increasing their vulnerability to biotic stresses such as pathogens. We explored how genetic variation in Arabica coffee sites in southwestern Ethiopia was related to the incidence of four major fungal diseases. Sixty sites were selected along a gradient of management intensity, ranging from nearly wild to intensively managed coffee stands. We used genotyping-by-sequencing of pooled leaf samples (pool-GBS) derived from 16 individual coffee shrubs in each of the sixty sites to assess the variation in genetic composition (multivariate: reference allele frequency) and genetic diversity (univariate: mean expected heterozygosity) between sites. We found that genetic composition had a clear spatial pattern and that genetic diversity was higher in less managed sites. The incidence of the four fungal diseases was related to the genetic composition of the coffee stands, but in a specific way for each disease. In contrast, genetic diversity was only related to the within-site variation of coffee berry disease, but not to the mean incidence of any of the four diseases across sites. Given that fungal diseases are major challenges of Arabica coffee in its native range, our findings that genetic composition of coffee sites impacted the major fungal diseases may serve as baseline information to study the molecular basis of disease resistance in coffee. Overall, our study illustrates the need to consider both host genetic composition and genetic diversity when investigating the genetic basis for variation in disease levels.

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Section: Variation In Fungal Diseases In Relation To Genetic Composit...mentioning

confidence: 64%

Section: Discussionmentioning

confidence: 99%

Genetic composition and diversity of Arabica coffee in the crop’s centre of origin and its impact on four major fungal diseases

et al. 2022

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“…According to Guzzo [98], more than 75% of the coffee cultivated in the world is susceptible to the majority of physiologic pathogenic races. Most breeding programs are aiming at developing a varieties resistance to this disease, particularly in Ethiopia [99].…”

Section: Breeding For Resistance To Coffee Leaf Rust (Clr)mentioning

confidence: 99%

Coffee (Coffea arabica L.): Methods, Objectives, and Future Strategies of Breeding in Ethiopia—Review

Melese

Kolech

2021

Sustainability

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Coffea arabica L. belongs to the Rubiaceae family, and the genus Coffea is believed to have a primary center of origin and genetic variability in the highlands of southwestern Ethiopia. It is a vital beverage commodity across the world and a valuable export product, ranking second in international trade after petroleum. Ethiopia is among the top five major coffee-producing countries and is Africa’s leading producer. However, its full production capacity has not yet been exploited, and research efforts to reduce biotic and abiotic factors through reproduction have been extremely limited. Hence, improvement through different breeding methods is essential to overcome the constraints in its production. Thus, the objective of this study is to review the different breeding methods applied for different traits in Ethiopia. Breeding methods depend on the type and the source of traits and the final breeding objectives. The main breeding objectives are production, resistance/tolerance to diseases, and cup quality. The commonly applied breeding methods are selected and intra-specific hybridization, germplasm enhancement, and the development of improved varieties with wider adaptability. There is also a practice of crossing parental lines selected for certain desirable traits for the development of hybrid varieties. Accordingly, some promising success has been obtained. Forty-one coffee varieties have been released so far. Because conventional breeding methods are time-consuming, integrating conventional breeding methods with biotechnological techniques could have an instrumental role in the rapid development of suitable varieties for the changing climate.

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“…Democratic Republic of Congo, [12]). In parallel, coffee wilt disease was first reported on arabica coffee in Ethiopia in the 1950s, becoming widespread in the 1970s, but with low severity of disease [13]. However, recently disease severity in Ethiopia has increased [14, 15].…”

Section: Introductionmentioning

confidence: 99%

Horizontal transfers between fungalFusariumspecies contributed to successive outbreaks of coffee wilt disease

Peck,

Llewellyn,

Bennetot

et al. 2023

Preprint

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Outbreaks of fungal disease have devastated plants and animals throughout history. Over the past century, the repeated emergence of coffee wilt disease caused by the fungal pathogenFusarium xylarioidesseverely impacted coffee production across sub-Saharan Africa. To improve the disease management of such pathogens, it is crucial to understand their genetic structure and evolutionary potential. We compared the genomes of 13 historic strains spanning six decades and multiple disease outbreaks to investigate population structure and host specialisation. We foundF. xylarioidescomprises at least four distinct lineages: one host-specific toCoffea arabica, one toC. canephoravar.robusta, and two historic lineages isolated from variousCoffeaspecies. Mapping variation onto a new long-read reference genome showed that host-specificity appears to be acquired through horizontal transfer of effector genes from members of theF. oxysporumspecies complex. This species complex is known to cause wilt disease in over 100 plant species. Multiple transfers into theF. xylarioidespopulations matched to different parts of theF. oxysporummobile pathogenicity chromosome and were enriched in effector genes and transposons. Effector genes in this region and other horizontally transferred carbohydrate-active enzymes important in the breakdown of plant cell walls were shown by transcriptomics to be highly expressed during infection ofC. arabicaby the fungal arabica strains. Widespread sharing of specific transposons betweenF. xylarioidesandF. oxysporum, and the presence of largeStarshipelements, indicate that transposons were involved in horizontal transfers. Our results support the hypothesis that horizontal gene transfers contributed to the repeated emergence of this fungal disease.

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Resistance levels in Coffea arabica to Gibberella xylarioides and distribution pattern of the disease

Cited by 15 publications

References 2 publications

Genetic composition and diversity of Arabica coffee in the crop’s centre of origin and its impact on four major fungal diseases

Genetic composition and diversity of Arabica coffee in the crop’s centre of origin and its impact on four major fungal diseases

Coffee (Coffea arabica L.): Methods, Objectives, and Future Strategies of Breeding in Ethiopia—Review

Horizontal transfers between fungalFusariumspecies contributed to successive outbreaks of coffee wilt disease

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