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| Registros recuperados: 18 | |
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| CHAVES, M. S.; SILVA, G. B. da; CAIERAO, E.; FEDERIZZI, L. C.; MARTINELLI, J. A.. |
| Abstract: Wheat breeding in Brazil began in 1919. A cross between the varieties Fronteira and Mentana gave rise to Frontana, the most popular ever released, being recommended for more than 40 years. Frontana played an important role as a source of resistance to leaf and stripe rust as well as resistance to preharvest sprouting. Possessing an early maturity cycle, it contributed to change the predominant varietal pattern at that time. The resistance gene Lr34 was first described in Frontana. The gene confers durable adult plant resistance to leaf rust and other biotrophic fungi. Because of its durability, stability across environments, haplotype diversity and wide geographical distribution, Lr34 is probably the most important single resistance gene in... |
| Tipo: Artigo de periódico |
Palavras-chave: Diagnostic molecular markers; Adult plant resistance; KASPar; Leaf rust. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1121808 |
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| CHAVES, M. S.; SILVA, G. B. da; CAIERAO, E.; FEDERIZZI, L. C.; MARTINELLI, J. A.. |
| Abstract: Wheat breeding in Brazil began in 1919. A cross between the varieties Fronteira and Mentana gave rise to Frontana, the most popular ever released, being recommended for more than 40 years. Frontana played an important role as a source of resistance to leaf and stripe rust as well as resistance to preharvest sprouting. Possessing an early maturity cycle, it contributed to change the predominant varietal pattern at that time. The resistance gene Lr34 was first described in Frontana. The gene confers durable adult plant resistance to leaf rust and other biotrophic fungi. Because of its durability, stability across environments, haplotype diversity and wide geographical distribution, Lr34 is probably the most important single resistance gene in... |
| Tipo: Artigo de periódico |
Palavras-chave: Diagnostic molecular markers; Adult plant resistance; KASPar; Leaf rust. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1122054 |
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| ZAMBOLIM, l.; CAIXETA, E. T.. |
| Coffee leaf rust is the most important disease thorought the world. The disease caused by a biotrofic fungi growing areas of the world coffee leaf rust causes losses from Central American coffee park. identified in 1860. Madagascar and Java). I the disease was identified in Brazil. America, Caribean and Mexico. Currently, more than 50 identified by using coffee differentials clones of CIFC in the world. The most comum and widespread resistance genes ( identified by the differential interaction of genes of the host and of the pathogen. M technique, found two different genes in HdT 832/1 and HdT 832/2 not yet identified in differential clones ( to refer the isolates of system. Several pathotypes was found in several countri based on a set of differentials of... |
| Tipo: Artigo de periódico |
Palavras-chave: Hemileia Vastatrix; Leaf rust; Coffea; Pathotypes. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1139326 |
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| ROSA, S.; LANGILLE, L.; HUMPHREYS, G.; MCCALLUM, B.; FETCH, T.; RANDHAWA, H.; HENRIQUEZ, M. A.; VOLDENG, H.; CUMMISKEY, A.; BLACKWELL, B.; SCHEEREN, P. L.; VALERIO, I.; TURRA, C.. |
| As part of a Canada-Brazil germplasm exchange, 106 modern and ancient Brazilian spring wheat cultivars have been genotyped and phenotypically evaluated in Canada since 2014 |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Wheat cultivars; Wheat germplasm; Germplasm; Leaf rust; Wheat; Spring wheat. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1121179 |
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| ROSA, S. B.; ZANELLA, C. M.; HIEBERT, C. W.; BRULE-BABEL, A. L.; RANDHAWA, H. S.; SHORTER, S.; BOYD, L. A.; MCCALLUM, B. D.; BRAMMER, S. P.. |
| Leaf and stripe rust are major threats to wheat production worldwide. The effective, multiple rust resistances present in the Brazilian cultivar Toropi makes it an excellent choice for a genetic study of rust resistance. Testing of DNA from different seed lots of Toropi with 2,194 polymorphic 90K iSelect single nucleotide polymorphism markers identified significant genetic divergence, with as much as 35% dissimilarity between seed lots. As a result, further work was conducted with a single plant line derived from Toropi variant Toropi-6.4. A double haploid population with 168 lines derived from the cross Toropi-6.4 × Thatcher was phenotyped over multiple years and locations in Canada, New Zealand, and Kenya, with a total of seven field trials undertaken... |
| Tipo: Artigo de periódico |
Palavras-chave: Adult plant resistance; Durable resistance; QTL; Leaf rust; Stripe rust; Wheat. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1137644 |
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| PORTO, B. N.; CAIXETA, E. T.; MATHIONI, S. M.; VIDIGAL, P. M. P.; ZAMBOLIM, L.; ZAMBOLIM, E. M.; DONOFRIO, N.; POLSON, S. W.; MAIA, T. A.; CHEN, C.; ADETUNJI, M.; KINGHAM, B.; DALIO, R. J. D.; RESENDE, M. L. V. de. |
| Coffee leaf rust caused by the fungus Hemileia vastatrix is one of the most important leaf diseases of coffee plantations worldwide. Current knowledge of the H. vastatrix genome is limited and only a small fraction of the total fungal secretome has been identified. In order to obtain a more comprehensive understanding of its secretome, we aimed to sequence and assemble the entire H. vastatrix genome using two next-generation sequencing platforms and a hybrid assembly strategy. This resulted in a 547 Mb genome of H. vastatrix race XXXIII (Hv33), with 13,364 predicted genes that encode 13,034 putative proteins with transcriptomic support. Based on this proteome, 615 proteins contain putative secretion peptides, and lack transmembrane domains. From this... |
| Tipo: Artigo de periódico |
Palavras-chave: Hemileia Vastatrix; Fungo; Ferrugem; Genome; Leaf rust; Infection. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113216 |
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| PESTANA, K. N.; CAPUCHO, A. S.; CAIXETA, E. T.; ALMEIDA, D. P. de; ZAMBOLIM, E. M.; CRUZ, C. D.; ZAMBOLIM, L.; PEREIRA, A. A.; OLIVEIRA, A. C. B. de; SAKIYAMA, N. S.. |
| Coffee leaf rust (CLR) caused by Hemileia vastatrix Berk. et Br. is one of the major Coffea arabica diseases world-wide. CLR resistance has been attributed to at least nine dominant genes, as single or in combination. We present an inheritance study and mapping loci involved in the Híbrido de Timor (HDT) UFV 443-03 resistance to race I, race II, and pathotype 001 of H. vastatrix . Molecular markers were used to ascertain the phenotypic results and to map the putative resistance loci. For all tree isolates, the inheritance study indicated that the resistance of HDT UFV 443-03 is conditioned by two independent dominant loci or by three independent loci (two dominant and one recessive). Molecular marker analyses ascertained that the resistance of HDT UFV... |
| Tipo: Artigo de periódico |
Palavras-chave: Leaf rust; Breeding; Chromosome mapping; Quantitative trait loci. |
| Ano: 2015 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1039824 |
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| SAAVEDRA, L. M.; CAIXETA, E. T.; BARKA, G. D.; BORÉM, A.; ZAMBOLIM, L.; NASCIMENTO, M.; CRUZ, C. D.; OLIVEIRA, A. C. B. de; PEREIRA, A. A.. |
| Abstract: In this study, marker-assisted recurrent selection was evaluated for pyramiding resistance gene alleles against coffee leaf rust (CLR) and coffee berry diseases (CBD) in Coffea arabica. A total of 144 genotypes corresponding to 12 hybrid populations from crosses between eight parent plants with desired morphological and agronomic traits were evaluated. Molecular data were used for cross-certification, diversity study and resistance allele marker-assisted selection (MAS) against the causal agent of coffee leaf rust (Hemileia vastatrix) and coffee berry disease (Colletotrichum kahawae). In addition, nine morphological and agronomic traits were evaluated to determine the components of variance, select superior hybrids, and estimate genetic gain.... |
| Tipo: Artigo de periódico |
Palavras-chave: Leaf rust; Coffee berry disease; Coffea arabica var. arabica. |
| Ano: 2023 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1157818 |
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| ROSA, S.; ZANELLA, C. M.; HIEBERT, C. W.; FETCH, T.; BRULE-BABEL, A. L.; RANDHAWA, H. S.; SHORTER, S.; BRAMMER, S. P.; BOYD, L.; McCALLLUM, B. D.. |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Trigo; Resistência Genética; Doença de Planta; Ferrugem; Wheat; Genetic resistance; Plant diseases and disorders; Leaf rust. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1115086 |
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| CARVALHO, H. F.; FERRÃO, L. F. V.; GALLI, G.; NONATO, J. V. A.; PADILHA, L.; MALUF, M. P.; RESENDE JR., M. F. R. de; FRITSCHE-NETO, R.; GUERREIRO-FILHO, O.. |
| Obtaining resistance cultivars for leaf miner and leaf rust are the main important strategy of Brazil?s national coffee breeding program. The narrow genetic basis, and founder effect consequences, lead to challenges in quantifying and detecting genetic diversity for these traits. Biotechnology tools allied with classical breeding strategies are powerful in detecting variability and deploying a precision selection. The selection based on the genetic merit of an individual obtained from thousands of single nucleotide polymorphism effects is known as genomic selection. The ordinal scale principally makes the resistance evaluation of the leaf rust and leaf miner of the score, categorizing the phenotypes following the discrete (ordinal) distribution. Hence,... |
| Tipo: Artigo de periódico |
Palavras-chave: Coffea arabica var. arabica; Leucoptera; Hemileia; Leaf rust; Genomics. |
| Ano: 2023 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1156023 |
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| ALMEIDA, D. P. de; CASTRO, I. S. L.; MENDES, T. A. de O.; ALVES, D. R.; BARKA, G. D.; BARREIROS, P. R. R. M.; ZAMBOLIM, L.; SAKIYAMA, N. S.; CAIXETA, E. T.. |
| The biotrophic fungus Hemileia vastatrix causes coffee leaf rust (CLR), one of the most devastating diseases in Coffea arabica . Coffee, like other plants, has developed effective mechanisms to recognize and respond to infections caused by pathogens. Plant resistance gene analogs (RGAs) have been identified in certain plants as candidates for resistance ( R ) genes or membrane receptors that activate the R genes. The RGAs identified in different plants possess conserved domains that play specific roles in the fight against pathogens. Despite the importance of RGAs, in coffee plants these genes and other molecular mechanisms of disease resistance are still unknown. This study aimed to sequence and characterize candidate genes from coffee plants with the... |
| Tipo: Artigo de periódico |
Palavras-chave: Receptor-Like Kinase; Hemileia Vastatrix; Hemileia; Leaf rust; Plant diseases and disorders; Coffea arabica var. arabica; Clones; Plant breeding. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1139319 |
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| Registros recuperados: 18 | |
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