Spatial and Temporal Genetic Diversity and Population Structure of Hemileia vastatrix from Peruvian Coffee Plantations

Quispe-Apaza, Cinthia; Mansilla, Roberto; Espejo, Rosa; Bernacchia, Giovanni; Yabar-Larios, Marisela; López-Bonilla, César

doi:10.5423/ppj.oa.10.2020.0192

Cited by 5 publications

(1 citation statement)

References 47 publications

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“…Furthermore, the unstructured population of H. vastatrix could result from asexual reproduction ( Ramírez-Camejo et al, 2021 ). The results of this study are similar to those from studies in the coffee-growing regions of Peru and Brazil ( Maia et al, 2013 ; Cabral et al, 2016 ; Quispe-Apaza et al, 2017 , 2021 ).…”

Section: Discussionsupporting

confidence: 90%

Incidence of Coffee Leaf Rust in Vietnam, Possible Original Sources and Subsequent Pathways of Migration

Okane

Ono

et al. 2022

Front. Plant Sci.

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This research focused on the incidence and population genetics of coffee leaf rust (CLR) fungus, Hemileia vastatrix, to estimate the possible original source(s) and subsequent migration pathways of wind-borne and human-aided spores in three main coffee production regions (Northwest, Central Highlands, and Southeast) in Vietnam. In southern Vietnam (Central Highlands and Southeast), Coffea canephora covers the majority area, while Catimor lines of C. arabica accounts for 95% of the coffee plantations in northwestern Vietnam. Field surveys conducted at eighty-five plantations, show coffee leaf samples infected by the rust fungus across forty-one plantations. Catimor varieties exhibited high levels of susceptibility with severe rust symptoms, while robusta varieties had varying degrees of susceptibility. We analyzed 863−869 base pairs of internal transcribed spacer (ITS) region from 83 samples (41 sequences from Vietnam, 2 from Thailand, and the remaining 40 from American countries); and fifty-two haplotypes consisting of 123 polymorphic sites were detected. Although the analysis of molecular variance (AMOVA) indicates significant genetic differentiation in the H. vastatrix populations in Vietnam, there was no clear genetic structure with respect to the three geographic areas surveyed. Based on the haplotype network, NeighborNet analysis, and geographical distribution patterns of the haplotypes, five haplotypes were identified as early established, from which most other haplotypes in Vietnam were derived. The early established haplotypes were found in the highest frequency in Northwest Vietnam. This finding corresponds to the earliest record of CLR in Vietnam. The phylogenetic network analysis also illustrated that H. vastatrix had expanded from the northwest to southern Vietnam. Pairwise genetic distance analysis and the geophylogenetic tree also suggests that CLR was first established in the Northwest. In addition, some scattered individuals on the principal coordinate analysis (PCoA) diagram and several separated haplotypes in the phylogenetic networks indicated that other branches of CLR in Vietnam were initiated in the Central Highlands. Hemileia vastatrix from these branches have been spreading in southern Vietnam.

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Section: Discussionsupporting

confidence: 90%

Incidence of Coffee Leaf Rust in Vietnam, Possible Original Sources and Subsequent Pathways of Migration

Okane

Ono

et al. 2022

Front. Plant Sci.

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Coffee Leaf Rust Resistance: An Overview

Guerra-Guimarães,

Diniz,

Azinheira

et al. 2023

Mutation Breeding in Coffee With Special Reference to Leaf Rust

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Coffee is one of the most important cash crops and beverages. Several diseases caused by fungi, bacteria, and viruses can affect coffee plantations and compromise production. Coffee leaf rust (CLR), caused by the biotrophic fungus Hemileia vastatrix is the top fungal disease, representing a permanent threat to sustainable Arabica coffee production for more than a century. This review provides a comprehensive survey of the most common coffee diseases, their importance, and geographic distribution, with an emphasis on coffee leaf rust. Summing up the progress obtained so far from different research fields on the coffee–H. vastatrix interaction, we revisited the pathogen genetic diversity and population dynamics, and the complex mechanisms underlying plant resistance/immunity. We also highlight how new advanced technologies can provide avenues for a deeper understanding of this pathosystem, which is crucial for devising more reliable and long-term strategies for disease control.

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Genetic diversity and structure of the coffee leaf rust fungus Hemileia vastatrix across different coffee management systems in Ethiopia

et al. 2023

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Spatial and Temporal Genetic Diversity and Population Structure of Hemileia vastatrix from Peruvian Coffee Plantations

Cited by 5 publications

References 47 publications

Incidence of Coffee Leaf Rust in Vietnam, Possible Original Sources and Subsequent Pathways of Migration

Incidence of Coffee Leaf Rust in Vietnam, Possible Original Sources and Subsequent Pathways of Migration

Coffee Leaf Rust Resistance: An Overview

Genetic diversity and structure of the coffee leaf rust fungus Hemileia vastatrix across different coffee management systems in Ethiopia

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