Bru1 gene and potential alternative sources of resistance to sugarcane brown rust disease

Racedo, Josefina; Perera, María Francisca; Bertani, Romina Priscila; Funes, Claudia; González, Victoria; Cuenya, María Inés; ́Hont, Angelique D; Welin, Björn; Castagnaro, Atilio Pedro

doi:10.1007/s10681-013-0905-3

Cited by 34 publications

(33 citation statements)

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“…For instance, the cross (family) X09-1236 in 2012 had the lowest mean brown rust rating among 295 families, but Bru1 was not detected in its parents CP03-1160 and CP04-1105 (Table 4). These results suggested that other genes may also be involved in the either durable or non-durable resistance of sugarcane plants to brown rust in addition to Bru1 [23] as reported by other studies [32][33][34][35]. Racedo et al [34] recently found that the predominant source of resistance to brown rust in the sugarcane breeding program at Tucuman, Argentina would be a resistance source independent of the Bru1 gene.…”

Section: Bru1 In Parental Clones and Rust Rating In Their Progenysupporting

confidence: 67%

Screening for Sugarcane Brown Rust in the First Clonal Stage of the Canal Point Sugarcane Breeding Program

Zhao

Davidson²,

Baltazar³

et al. 2015

Agronomy

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Sugarcane (Saccharum spp.) brown rust (caused by Puccinia melanocephala Syd. & P. Syd.) was first reported in the United States in 1978 and is still one of the great challenges for sugarcane production. A better understanding of sugarcane genotypic variation in response to brown rust will help optimize breeding and selection strategies for disease resistance. Brown rust ratings were scaled from non-infection (0) to severe infection (4) with intervals of 0.5 and routinely recorded for genotypes in the first clonal selection stage of the Canal Point sugarcane breeding program in Florida. Data were collected from 14,272 and 12,661 genotypes and replicated check cultivars in 2012 and 2013, respectively. Mean rust rating, % infection, and severity in each family and progeny of female parent were determined, and their coefficients of variation (CV) within and among families (females) were estimated. Considerable variation exists in rust ratings among families or females. The families and female parents with high susceptibility or resistance to brown rust were identified and ranked. The findings of this study can help scientists to evaluate sugarcane crosses and parents for brown rust disease, to use desirable parents for crossing, and to improve genetic resistance to brown rust in breeding programs. OPEN ACCESSAgronomy 2015, 5 342

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Section: Bru1 In Parental Clones and Rust Rating In Their Progenysupporting

confidence: 67%

Screening for Sugarcane Brown Rust in the First Clonal Stage of the Canal Point Sugarcane Breeding Program

Zhao

Davidson²,

Baltazar³

et al. 2015

Agronomy

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“…O método mais eficaz para controlar a ferrugem marrom é o uso de variedades resistentes (14,25,26,27,28,29). A base da herança genética de resistência a essa doença tem sido amplamente estudada e alguns autores defendem que a resistência é controlada por um ou poucos genes (18,25,26,27,28,29,30,31,32,33).…”

Section: Introductionunclassified

“…A base da herança genética de resistência a essa doença tem sido amplamente estudada e alguns autores defendem que a resistência é controlada por um ou poucos genes (18,25,26,27,28,29,30,31,32,33). Um gene de resistência, denominado Bru1, foi o primeiro caráter mendeliano descrito para o complexo genoma da cana-de-açúcar (18,26,30,32).…”

Section: Introductionunclassified

“…Esta inserção induz redução de recombinação, resultando em forte desequilíbrio de ligação (LD) na região Bru1 e um completo LD entre dois marcadores moleculares, R12H16 e 9O20-F4. Estes representam valiosos marcadores diagnósticos para a presença de Bru1, sendo possível, através deles, prever o comportamento resistente em genótipos de canade-açúcar (25,26,28,29). Além disso, a ausência destes marcadores em uma variedade resistente indicaria uma possível fonte alternativa de resistência (25,26,27,28,29).…”

Section: Introductionunclassified

“…Estes representam valiosos marcadores diagnósticos para a presença de Bru1, sendo possível, através deles, prever o comportamento resistente em genótipos de canade-açúcar (25,26,28,29). Além disso, a ausência destes marcadores em uma variedade resistente indicaria uma possível fonte alternativa de resistência (25,26,27,28,29). O objetivo deste estudo foi avaliar a eficiência dos marcadores moleculares R12H16 e 9O20-F4-RsaI na predição de resistência genética de variedades de cana-de-açúcar à ferrugem marrom.…”

Section: Introductionunclassified

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Validação de marcadores moleculares associados à resistência à ferrugem marrom em cana-de-açúcar

et al. 2017

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A ferrugem marrom causada pelo fungo Puccinia melanocephala é uma importante doença em cana-de-açúcar (Saccharum spp.) e está presente em praticamente todas as áreas de cultivo. Um gene de efeito maior, Bru1, foi descrito como fonte de resistência durável da cana-de-açúcar contra isolados de P. melanocephala. O objetivo deste estudo foi avaliar a eficiência de dois marcadores moleculares fortemente associados ao gene Bru1, R12H16 e 9O20-F4-RsaI, para predição da resistência genética à ferrugem marrom em variedades de cana-de-açúcar. ABSTRACTBrown rust caused by the fungus Puccinia melanocephala is an important disease affecting sugarcane (Saccharum spp.) and is present in almost all growing areas. A major effect gene, Bru1, was described as a durable resistance source in sugarcane against isolates of P. melanocephala. The aim of this study was to evaluate the efficiency of two molecular markers strongly associated with Bru1 gene, R12H16 and 9O20-F4-RsaI, for prediction of genetic resistance to brown rust in sugarcane varieties. Thus, this study included 14 RB varieties, developed by RIDESA (Interuniversity Network for the Development of the Sugarcane Industry), which were among the 10 most cultivated varieties in the central-south region of Brazil in the period of 1974-2015. To evaluate the disease in the field an experiment was conducted in randomized blocks with four replicates. The severity of Barreto, F.Z.; Balsalobre, T.W.A. Chapola, R.G.; Hoffmann, H.P.; Carneiro, M.S. Validation of molecular markers associated with brown rust resistance in sugarcane. Summa Phytopathologica, v.43, n.1, p.36-40, 2017. brown rust was quantified according to a diagrammatic scale ranging from 1 (most resistant) to 9 (most susceptible), and the obtained data were analyzed by using a generalized linear mixed model (GLMM). Concomitantly, total DNA was extracted from the 14 varieties, followed by amplification of the molecular markers, which were classified into haplotypes. Out of the total varieties, 12 had no symptoms of the disease and showed 99.35% probability of being resistant according to analysis via GLMM; among them, 91.66% were haplotype 1, i.e., had the presence of both markers associated with Bru1 gene. Therefore, we can conclude that the molecular markers R12H16 and 9O20-F4-RsaI were highly efficient in predicting resistant phenotypes and that Bru1 gene is probably the main source of sugarcane resistance to brown rust in commercial fields in Brazil.Keywords: Saccharum spp., breeding, Puccinia melanocephala, Bru1, disease resistance.A cana-de-açúcar (Saccharum spp.) está entre as mais importantes espécies cultivadas, principalmente para produção de açúcar e bioetanol (1). O Brasil é atualmente o país com a maior produção de cana-deaçúcar com mais de nove milhões de hectares cultivados e produtividade estimada em 76.909 kg ha -1 na safra 2015/16 (1, 2). A cana-de-açúcar é uma gramínea semi-perene com propagação vegetativa, sendo que os programas de melhoramento genético têm concentrado esforços para o desenvolviment...

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Origin, Genetic Diversity, Conservation, and Traditional and Molecular Breeding Approaches in Sugarcane

Cursi

Castillo²,

Tarumoto

et al. 2021

Cash Crops

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Bru1 gene and potential alternative sources of resistance to sugarcane brown rust disease

Cited by 34 publications

References 11 publications

Screening for Sugarcane Brown Rust in the First Clonal Stage of the Canal Point Sugarcane Breeding Program

Screening for Sugarcane Brown Rust in the First Clonal Stage of the Canal Point Sugarcane Breeding Program

Validação de marcadores moleculares associados à resistência à ferrugem marrom em cana-de-açúcar

Origin, Genetic Diversity, Conservation, and Traditional and Molecular Breeding Approaches in Sugarcane

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