Unveiling the predominance of Saccharum spontaneum alleles for resistance to orange rust in sugarcane using genome-wide association

Dijoux, Jordan; Rio, Simon; Hervouet, Catherine; Garsmeur, Olivier; Barau, Laurent; Dumont, Thomas; Rott, Philippe; D’Hont, Angélique; Hoarau, Jean-Yves

doi:10.1007/s00122-024-04583-3

Cited by 3 publications

(1 citation statement)

References 56 publications

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“…In the study conducted by Dijoux et al [ 78 ], a detailed assessment was carried out on 568 modern interspecific hybrids of sugarcane ( Saccharum officinarum x S . spontaneum ) from the Réunion breeding program, focusing on resistance to orange rust under natural infection conditions.…”

Section: Discussionmentioning

confidence: 99%

Molecular evaluation and phenotypic screening of brown and orange rust in Saccharum germplasm

Oliveira,

Barreto,

Balsalobre

et al. 2024

PLoS ONE

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Brazil is the largest global producer of sugarcane and plays a significant role—supplier of sugar and bioethanol. However, diseases such as brown and orange rust cause substantial yield reductions and economic losses, due decrease photosynthesis and biomass in susceptible cultivars. Molecular markers associated with resistance genes, such as Bru1 (brown rust) and G1 (orange rust), could aid in predicting resistant genotypes. In this study, we sought to associate the phenotypic response of 300 sugarcane accessions with the genotypic response of Bru1 and G1 markers. The field trials were conducted in a randomized block design, and five six-month-old plants per plot were evaluated under natural disease conditions. Genotypic information about the presence or absence of Bru1 (haplotype 1) and G1 gene was obtained after extraction of genomic DNA and conventional PCR. Of the total accessions evaluated, 60.3% (181) showed resistance to brown rust in the field, and of these, 70.7% (128) had the Bru1 gene present. Considering the field-resistant accessions obtained from Brazilian breeding programs (116), the Bru1 was present in 77,6% of these accessions. While alternative resistance sources may exist, Bru1 likely confers enduring genetic resistance in current Brazilian cultivars. Regarding the phenotypic reaction to orange rust, the majority of accessions, 96.3% (288), were field resistant, and of these, 52.7% (152) carried the G1 marker. Although less efficient for predicting resistance when compared to Bru1, the G1 marker could be part of a quantitative approach when new orange rust resistance genes are described. Therefore, these findings showed the importance of Bru1 molecular markers for the early selection of resistant genotypes to brown rust by genetic breeding programs.

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Section: Discussionmentioning

confidence: 99%

Molecular evaluation and phenotypic screening of brown and orange rust in Saccharum germplasm

Oliveira,

Barreto,

Balsalobre

et al. 2024

PLoS ONE

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Sugarcane genetics: Underlying theory and practical application

Wang,

Pan,

et al. 2024

The Crop Journal

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A Diagnostic Guide for Orange Rust Disease in Sugarcane

Cárdenas,

Carrillo-Tarazona,

Sood

et al. 2024

Plant Health Progress

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Puccinia kuehnii is an important air-borne fungal pathogen of sugarcane, causing orange rust disease. P. kuehnii has been present in the Asia-Oceania region for over a century. The first report of this pathogen in the Western hemisphere was in 2007 when it appeared in Florida, US. The main objective of this diagnostic guide is to provide detailed information about symptoms and signs of sugarcane orange rust as well as taxonomy, geographic distribution, isolation, identification, and storage of P. kuehnii. We also highlight the management strategies used in recent years to control this devastating fungal disease. This diagnostic guide will help facilitate future research focusing on fungal isolation procedures, genetics, and population studies of this pathogen.

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Unveiling the predominance of Saccharum spontaneum alleles for resistance to orange rust in sugarcane using genome-wide association

Cited by 3 publications

References 56 publications

Molecular evaluation and phenotypic screening of brown and orange rust in Saccharum germplasm

Molecular evaluation and phenotypic screening of brown and orange rust in Saccharum germplasm

Sugarcane genetics: Underlying theory and practical application

A Diagnostic Guide for Orange Rust Disease in Sugarcane

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