New soybean (Glycine max Fabales, Fabaceae) sources of qualitative genetic resistance to Asian soybean rust caused by Phakopsora pachyrhizi (Uredinales, Phakopsoraceae)

Pierozzi, Pedro Henrique Braga; Ribeiro, Aliny Simony; Moreira, J. U. V.; Laperuta, Larissa Di Cássia; Rachid, Breno Francovig; Lima, Walcir Ferreira; Arias, Carlos A.; Oliveira, Marcelo Fernandes de; Toledo, J.F.

doi:10.1590/s1415-47572008000300018

Cited by 36 publications

(39 citation statements)

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“…The obtained segregation pattern in the F 2 generations of each cross also supported the hypothesis that each new source carries a single dominant gene controlling resistance. The soybean breeding line BR01-18437, studied by Pierozzi et al (2008), probably received its resistant gene from PI 203398 (Abura), which was used as high protein genetic source. However, the gene from BR01-18437 is recessive, while the gene from PI 203398 studied here is dominant.…”

Section: Resultsmentioning

confidence: 99%

“…The observed segregation pattern, 13 resistant to 3 susceptible, indicated that its resistant gene is recessive or does not express dominance when crossed with PI 230970 and PI 459025. Recessive ASR-resistance genes have been fi rst reported in the soybean line BR01-18437 (Pierozzi et al, 2008), andthen in PI 200456 andPI 224270 (Calvo et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

“…Other plant introductions as PI 417125, PI 203398 (Abura), PI 416764, PI 417115, PI 416819, PI 340050 and PI 417503 were studied and presented resistance reaction to P. pachyrhizi (Miles et al, 2006). More recently, other ASR major resistance genes, though recessive, were identifi ed in the advanced Brazilian soybean line BR01-18437 (Pierozzi et al, 2008), andin PI 200456 andPI 224270 (Calvo et al, 2008). Finally, the fi fth ASR resistance locus, Rpp5, and a recessive allele from PI 200456 and dominant alleles from PI 200526, PI 200487 and PI 471904 were identifi ed .…”

Section: Introductionmentioning

confidence: 99%

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Novos genes de resistência à ferrugem-asiática-da-soja: teste de alelismo para os locos Rpp2 e Rpp4

Laperuta

Arias

Ribeiro

et al. 2008

Pesq. agropec. bras.

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-The objective of this study was to conduct allelic tests including crosses between a group of rust resistant genotypes from Embrapa's soybean germplasm collection and PI 230970 and PI 459025, which carry the Rpp2 and Rpp4 genes, respectively. Asian Soybean rust (ASR) caused by the fungus Phakopsora pachyrhizi has resulted in signifi cant yield losses and concern among Brazilian farmers. Until recently, there were four resistance genes (Rpp1 through Rpp4) described in the literature, but only Rpp2 and Rpp4 are still effective in Brazil. Twenty-six sources of resistance to P. pachyrhizi were crossed with PI 230970 and PI 459025 (Rpp2 and Rpp4 gene sources, respectively) and plants of their F 2 generations were infected with a suspension containing 2.5x10 4 spores per milliliter and assessed in a greenhouse after 20 days, for the presence of resistant (RB) or susceptible (TAN) lesions. Chi-square tests were applied to investigate the hypotheses of independent or allelic resistance gene segregations. ASR resistant genes derived from PI 197182, PI 230971 and PI 417125 did not segregate in crosses with PI 230970, which indicates that these genotypes have a single resistance gene in the Rpp2 locus. Crosses with the other 23 genotypes resulted in segregating populations, suggesting that their resistance genes do not belong to Rpp2 or Rpp4 loci.Index terms: Glycine max, Phakopsora pachyrhizi, inheritance, vertical resistance. Novos genes de resistência à ferrugem-asiática-da-soja: teste de alelismo para os locos Rpp2 e Rpp4Resumo -O objetivo deste estudo foi desenvolver testes de alelismo, inclusive cruzamentos entre um grupo de genótipos resistentes à ferrugem, do banco de germoplasma de soja da Embrapa, e as duas fontes de resistência com os genes Rpp2 e Rpp4. A ferrugem-asiática-da-soja, causada pelo fungo Phakopsora pachyrhizi, tem gerado perdas signifi cativas na produtividade da cultura e preocupado os agricultores brasileiros. Até recentemente, existiam quatro genes de resistência descritos na literatura, mas somente Rpp2 e Rpp4 continuam efetivos no Brasil. Vinte e seis fontes com resistência a P. pachyrhizi foram cruzadas com PI 230970 e PI 459025 (fontes dos genes Rpp2 e Rpp4, respectivamente), e as plantas da geração F 2 foram infectadas com uma suspensão com 2,5x10 4 esporos por mililitro e analisadas em casa de vegetação após 20 dias, para verifi cação da presença de lesões de resistência (RB) ou de suscetibilidade (TAN). Foram aplicados testes de qui-quadrado para investigar as hipóteses de segregação independente ou de alelos de resistência nos locos Rpp2 e Rpp4. Termos para indexação: Glycine max, Phakopsora pachyrhizi, herança, resistência vertical.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novos genes de resistência à ferrugem-asiática-da-soja: teste de alelismo para os locos Rpp2 e Rpp4

Laperuta

Arias

Ribeiro

et al. 2008

Pesq. agropec. bras.

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“…Os genótipos testados e seus respectivos Grupos de Maturidade Relativa (GMR) foram: 'BRS 291RR' (6.6), 'NK 7059RR' (6.2), 'BRS 245RR' (7.5), 'BRS Favorita RR' (7.9), 'BRS 239' (6.9), 'BRS 320' (6.2), 'BR 02-04844' (7.2) e 'BRSGO 7560' (7.4). Destes, apenas a cultivar 'NK 7059RR' e a linhagem 'BR 02-04844' apresentam tipo de crescimento indeterminado, e a cultivar 'BRSGO 7560' é a única que possui gene de resistência monogênica, a qual é oriunda da fonte 'BR01-18437' (PIEROZZI et al, 2008).…”

Section: Methodsunclassified

“…portadores de genes maiores, ou ainda resistências ditas verticais, tem sido um grande desafio para a pesquisa (CALVO et al, 2008;PIEROZZI et al, 2008;MAPHOSA et al, 2013).…”

Section: Introductionunclassified

Tolerância de genótipos de soja à ferrugem-asiática

2015

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SNP assay to detect the ‘Hyuuga’ red-brown lesion resistance gene for Asian soybean rust

Monteros

Phillips

et al. 2010

Theor Appl Genet

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Asian soybean rust (ASR), caused by Phakopsora pachyrhizi Syd., has the potential to become a serious threat to soybean, Glycine max L. Merr., production in the USA. A novel rust resistance gene, Rpp?(Hyuuga), from the Japanese soybean cultivar Hyuuga has been identified and mapped to soybean chromosome 6 (Gm06). Our objectives were to fine-map the Rpp?(Hyuuga) gene and develop a high-throughput single nucleotide polymorphism (SNP) assay to detect this ASR resistance gene. The integration of recombination events from two different soybean populations and the ASR reaction data indicates that the Rpp?(Hyuuga) locus is located in a region of approximately 371 kb between STS70887 and STS70923 on chromosome Gm06. A set of 32 ancestral genotypes which is predicted to contain 95% of the alleles present in current elite North American breeding populations and the sources of the previously reported ASR resistance genes (Rpp1, Rpp2, Rpp3, Rpp4, Rpp5, and rpp5) were genotyped with five SNP markers. We developed a SimpleProbe assay based on melting curve analysis for SNP06-44058 which is tighly linked to the Rpp?(Hyuuga) gene. This SNP assay can differentiate plants/lines that are homozygous/homogeneous or heterozygous/heterogeneous for the resistant and susceptible alleles at the Rpp?(Hyuuga) locus.

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New soybean (Glycine max Fabales, Fabaceae) sources of qualitative genetic resistance to Asian soybean rust caused by Phakopsora pachyrhizi (Uredinales, Phakopsoraceae)

Abstract: Asian soybean rust (ASR), caused by the phytopathogenic fungi Phakopsora pachyrhizi, has caused large reductions in soybean (Glycine max) yield in most locations in Brazil where it has occurred since it was first reported in

Cited by 36 publications

References 12 publications

Novos genes de resistência à ferrugem-asiática-da-soja: teste de alelismo para os locos Rpp2 e Rpp4

Novos genes de resistência à ferrugem-asiática-da-soja: teste de alelismo para os locos Rpp2 e Rpp4

Tolerância de genótipos de soja à ferrugem-asiática

SNP assay to detect the ‘Hyuuga’ red-brown lesion resistance gene for Asian soybean rust

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