SH1 leaf rust and bacterial halo blight coffee resistances are genetically independent

Rodrigues, Lucas Mateus Rivero; Braghini, Masako Toma; Filho, Oliveiro Guerreiro

doi:10.1590/1678-4499.171

Cited by 3 publications

(3 citation statements)

References 3 publications

(4 reference statements)

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“…Additional potential sources of resistance to BHB were identified in some varieties of C. arabica , some genotypes derived from Caturra × Timor hybrids, and the species Coffea eugenioides and Coffea stenophylla (Mohan et al ., ). The existence of genes that confer resistance to BHB, in addition to SH1 , is supported by results obtained with progenies derived from crosses of Caturra with the Timor hybrid (Mohan et al ., ; Cardoso & Sera, ), IAPAR‐59 with descendants of C. arabica SH1 × Catuaí Vermelho IAC 81 (Petek et al ., , ), and Catuaí Vermelho IAC 24 with IAC 1137‐5 of Geisha (Rodrigues et al ., ).…”

Section: Bacterial Halo Blightmentioning

confidence: 97%

Coffee bacterial diseases: a plethora of scientific opportunities

Badel

Zambolim

2019

Plant Pathology

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Coffee is a very important crop for several tropical countries across different continents. The diseases bacterial halo blight (BHB), bacterial leaf spot (BLS), bacterial leaf blight (BLB) and coffee leaf scorch (CLS), caused by the bacterial pathogens Pseudomonas syringae pv. garcae (Psgc), P. syringae pv. tabaci (Psta), Pseudomonas cichorii (Pch) and Xylella fastidiosa subsp. pauca (Xfp), respectively, cause significant reductions in coffee production, although other minor bacterial diseases have also been reported in some countries. Little research progress has been made on aspects that are relevant for control and management of these diseases. In all cases, there is an urgent need to develop rapid and more reliable methods for early detection of the pathogens in order to minimize their negative impact on coffee production. Because of the high rate of intra‐ and intersubspecific recombination occurring in X. fastidiosa, a permanent revision of the detection methods is necessary. Greater efforts should be made to understand the genetic and virulence diversity of Psgc, Psta and Pch populations. Early studies reported the identification of potential sources of resistance against Psgc and Psta, but, to date, no resistance gene has been isolated. Little effort has been made to understand the biology and molecular mechanisms underlying the interaction between Coffea spp. and these pathogenic bacteria. This review discusses the recent progress on the molecular mechanisms used by these bacteria to cause diseases on other plant species, in order to provide a guideline for the establishment of future research programmes.

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Section: Bacterial Halo Blightmentioning

confidence: 97%

Coffee bacterial diseases: a plethora of scientific opportunities

Badel

Zambolim

2019

Plant Pathology

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“…Coffee plants containing the SH 1 factor, from cultivars Harar, Geisha, Dilla and Alghe, S12-K, and others, especially from Ethiopian origin, were less affected by Elgon die back in Kenya (FIRMAN 1963), and resistant to BHB in experiments carried out in Brazil (MORAES et al 1975, MOHAN et al 1978, PETEK et al 2005. However recent studies showed that the SH 1 gene has no genetic linkage to CLR and BHB resistance (RODRIGUES et al 2017) and coffee cultivars Dilla and Geisha showed susceptibility to some P. syringae pv. garcae strains in Kenya (ITHIRU et al 2016).…”

Section: Reviewmentioning

confidence: 99%

Management of bacterial halo blight and other coffee crop diseases

Patrício¹,

Beriam²,

Santos³

et al. 2021

RAPP

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Bacterial halo blight (BHB), caused by Pseudomonas syringae pv. garcae, has reemerged as an important disease in Brazil, especially in coffee cultivated at high altitude in the states of Minas Gerais and São Paulo. In this study we evaluated copper-based antimicrobial compounds (CBACs), the antibiotic kasugamycin and the resistant inducers acibenzolar-S-methyl (ASM) and phosphite for BHB management in four experiments carried out in coffee crops in the municipalities of Caconde and Altinópolis, São Paulo State, Brazil. Fungicides to control brown leaf spot (BLS), a disease caused by Boeremia exigua pv. coffea, were also included in two experiments, because both diseases frequently occur simultaneously. Copper oxychloride, copper hydroxide, antibiotic, and ASM mixture with copper hydroxide, and phosphite reduced BHB incidence and had no phytotoxic effects on flowers or pin-head berries. Mixtures of boscalid or pyraclostrobin with copper hydroxide were compatible and effective for the simultaneous control of BHB and BLS. In this study, we showed that August-September is the most important period to control BHB in Brazil and lasts until December, when disease incidence increases, and flowers and pin-head berries are being formed.

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“…In addition, these two accesses were also the most similar to each other for the first year of harvest and, according to Scholz et al (2016), for genetic improvement purposes, it is important to classify genotypes with similar characteristics. The BE5 Wush-Wush access originates from Ethiopia, with the SH1 resistance factor (Rodrigues, Braghini and Guerreiro Filho, 2017) and has red fruits with early and uniform ripeness. The Híbrido de Timor genotype comes from the interspecific crossing of C. arabica and C. canephora and the descendants of this genotype are widely used in genetic improvement to promote resistance to various coffee diseases (Setotaw et al, 2010;Romero et al, 2014).…”

Section: Multivariate Data Analysismentioning

confidence: 99%

Sensory Profile of Arabica Coffee Accesses of the Germplasm Collection of Minas Gerais – Brazil

Fassio¹,

Pereira²,

Malta

et al. 2019

C.Sci.

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This study was developed to determine the beverage quality and the sensory profile of <em>Coffea arabica</em> accesses of the Germplasm Collection of Minas Gerais State in two consecutive harvests. Mature coffee fruits from 49 accesses were selectively harvested in the 2015 and 2016 harvests, and after processing and drying they were sensorially evaluated by a team of trained judges in accordance to the protocols of the Specialty Coffee Association. The data were analyzed by Principal Component Analysis, Cluster Hierarchical Analysis, and Content Analysis. The year of harvest influences the scores of the sensory attributes of the beverage of some coffee accesses. The access 27 (Pacamara) stood out with the highest sensory score seen in the first year of harvest. The accesses 36 (Timor Hybrid UFV376-52) and 43 (BE5 WushWush) stood out for the final sensory score in the two years of evaluation. All accesses belonging to the Timor Hybrid Germplasm stood out in the beverage quality in the second year of harvest. A total of 139 sensory attribute descriptors were identified, and the content analysis showed different levels for the frequency of terms in each access group formed as a function of quality. The Germplasm Collection of Minas Gerais has a wide variability for the production of superior quality coffees, and the year of harvest influences to a greater or lesser degree the potential of quality of the accesses.

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SH1 leaf rust and bacterial halo blight coffee resistances are genetically independent

Cited by 3 publications

References 3 publications

Coffee bacterial diseases: a plethora of scientific opportunities

Coffee bacterial diseases: a plethora of scientific opportunities

Management of bacterial halo blight and other coffee crop diseases

Sensory Profile of Arabica Coffee Accesses of the Germplasm Collection of Minas Gerais – Brazil

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