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| Registros recuperados: 255 | |
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| Nishio, Zenta; Orme, Chihiro; Ito, Miwako; Tabiki, Tadashi; Nagasawa, Koichi; Miura, Hideho. |
| Fusarium head blight (FHB) is one of the most devastating diseases of wheat (Triticum aestivum L.), and the development of cultivars with FHB resistance is the most effective way to control the disease. Yumechikara is a Japanese hard red winter wheat cultivar that shows moderate resistance to FHB with superior bread-making quality. To identify quantitative trait loci (QTLs) for FHB resistance in Yumechikara, we evaluated doubled haploid lines derived from a cross between Yumechikara and a moderate susceptible cultivar, Kitahonami, for FHB resistance in a 5-year field trial, and we analyzed polymorphic molecular markers between the parents. Our analysis of these markers identified two FHB-resistance QTLs, one from Yumechikara and one from Kitahonami. The... |
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Palavras-chave: Fusarium head blight; Wheat; Resistance; Quantitative trait loci. |
| Ano: 2016 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4454 |
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| Aquacop, Aquacop; Le Moullac, Gilles; Damez, D. |
| The notion of penaeid shrimp postlarvae quality, which implies a survival potential, is still a subjective parameter. The zootechnical criteria and the visual observations are not sufficient to evaluate the physiological condition of the hatchery reared postlarvae. The resistance of postlarvae to salinity shocks is a representative criteria of their condition. The goal of this study is to present a non-linear regression model at 2 variables (size, salinity) for the P. vannamei postlarvae resistance to salinity shocks. Between the second and the twentieth day after metamorphosis; 5 salinity shocks (20, 15, 10, 5 and 20/00) were tested daily, each one with 50 postlarvae. Survival rates were recorded after 2 hrs. Concurrently, the postlarvae growth in the... |
| Tipo: Text |
Palavras-chave: Salinity; Resistance; Growth; Postlarvae; Penaeus vannamei; Salinité; Résistance; Croissance; Postlarve; Penaeus vannamei. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/1991/publication-4430.pdf |
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| GAZOLA,T.; DIAS,M.F.; CARBONARI,C.A.; VELINI,E.D.. |
| ABSTRACT: The objective of this work was to monitor the resistance of sourgrass (Digitaria insularis) to glyphosate in urban areas of the State of São Paulo to understand the spread of resistant biotypes. Three experiments were conducted under greenhouse conditions in a completely randomized design, with four replications. In the first experiment, seven sourgrass biotypes were used, and the control of plants was evaluated at 7, 14, 21, 28, and 35 days after application (DAA) of glyphosate. In the second experiment, the shikimic acid accumulation was quantified at 72 hours after the glyphosate application, and the same evaluations of weed control were performed. In the third experiment, rate-response curves were developed, with glyphosate at rates of 0, 90,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Shikimic acid; Digitaria insularis; EPSPS; Resistance. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100183 |
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| Alves,Rodrigo P; Blank,Arie F; Oliveira,Alisson Marcel S; Santana,Aléa Dayane D; Pinto,Vanderson S; Andrade,Thiago M. |
| ABSTRACT Sweet potato (Ipomoea batatas) spreads mainly by vegetative propagation, and therefore this vegetable may have duplicate accessions in germplasm banks. The authors aimed to characterize morpho-agronomically the sweet potato germplasm from the Active Germplasm Bank (AGB) of Universidade Federal de Sergipe (UFS).The experiment was carried out at the Research Farm “Campus Rural da UFS”. The experimental design was a randomized block design, testing 73 sweet potato accessions with two replicates and four plants per plot. Morpho-agronomic traits of aboveground part and roots were evaluated. We observed that the leaf lobe type, the number of lobes per leaf, shape of central lobe, and general leaf shape were traits which provided the most variability... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ipomoea batatas; Resistance; Diversity; Descriptors; Productivity. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362017000400534 |
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| Carmo,Lílian S.T.; Cândido,Elizabete S.; Campos,Pollyanna F.; Quezado-Duval,Alice Maria; Leonardecz,Eduardo; Lopes,Carlos A.; Quirino,Betania F.. |
| This work aimed to study the interaction between the model plant Arabidopsis thaliana and Xanthomonas campestris pv. campestris (Xcc), the pathogen responsible for black rot of crucifers. The response of 32 accessions of A. thaliana to the Brazilian isolate of Xcc CNPH 17 was evaluated. No immunity-like response was observed. "CS1308", "CS1566" and "CS1643" grown in continuous light were among the accessions that showed strongest resistance when inoculated with 5 x 10(6) CFU/mL. In contrast, "CS1194" and "CS1492" were among the most susceptible accessions. Similar results were obtained when plants were grown under short-day conditions. To quantify the differences in disease symptoms, total chlorophyll was extracted from contrasting accessions at different... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Susceptibility; Resistance; Black rot of crucifers; Plant-pathogen interaction. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582007000200001 |
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| RIZZARDI,M.A.; SCHNEIDER,T.; BIANCHI,M.A.; ROCKENBACH,A.P.. |
| ABSTRACT: Horseweed is an annual cycle weed naturally controlled by the herbicide glyphosate. However, the continued use of this product has selected tolerant and resistant populations. The objective of this study is to analyze the occurrence of horseweed biotypes with a low glyphosate susceptibility in the states of Rio Grande do Sul, Paraná and Mato Grosso do Sul. Seeds of horseweed plants (Conyzaspp.) that survived glyphosate applications were collected in RR soybean crops, totaling 137 samples from 37 municipalities. The seeds of the biotypes were sown, and the plants originated from them, when they reached the stage of four to six leaves, were subjected to a treatment with 1,440ga.e.ha-1 of glyphosate. According to the results, 108biotypes were not... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conyza bonariensis; Conyza sumatrensis; Conyza canadensis; Resistance; Chemical control. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100290 |
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| PRABHU,ANNE S.; FILIPPI,MARTA C.; ARAUJO,LEILA G.. |
| A study was undertaken to examine the pathogenic diversity of Pyricularia grisea isolates retrieved from 14 upland rice (Oryza sativa) cultivars in experimental plots during a period of five years. Inoculations were performed on 32 genotypes with 85 monoconidial isolates under controlled greenhouse conditions. Based on the reaction pattern of eight international differentials, eleven pathotypes of P. grisea were identified. The predominant international races or pathotypes were IB-9 (56.4%), IB-1 (16.4%) and IB-41 (11.8%). A set of eight commercial upland rice cultivars ('Carajás', 'Confiança', 'Maravilha', 'Primavera', 'Progresso', 'Caiapó', 'IAC-47', 'IAC-201') was utilized as additional differentials for describing the virulence pattern of P. grisea.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Magnaporthe grisea; Physiologic races; Differential varieties; Resistance; Virulence. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000500005 |
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| Wagner Júnior,Américo; Fabiane,Keli Cristina; Oliveira,Jéssica Scarlet Marth Alves de; Zanela,Juliano; Citadin,Idemir. |
| It was evaluated the genetic divergence in peach genotypes for brown rot reaction. It was evaluated 26 and 29 peach genotypes in the 2009/2010 and 2010/2011 production cycle, respectively. The experiment was carried out at the Laboratório de Fitossanidade, da UTFPR - Campus Dois Vizinhos. The experimental design was entirely randomized, considering each peach genotype a treatment, and it was use three replication of nine fruits. The treatment control use three replication of three peach. The fruit epidermis were inoculated individually with 0.15 mL of M. fructicola conidial suspension (1.0 x 10(5) spores mL-1). In the control treatment was sprayed with 0.15 mL of distilled water. The fruits were examined 72 and 120 hours after inoculation, and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding; Monilinia fructicola; Resistance; Prunus sp. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452011000500075 |
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| SOUSA,ALAIN DENIS DE; PEDROSA,ELVIRA MARIA RÉGIS; SILVA,CLÁUDIA ULISSES DE CARVALHO; CASTRO,JOSÉ MAURO DA CUNHA E; RIBEIRO,JULIANA MARTINS. |
| ABSTRACT Meloidogyne enterolobii has severely compromised the main guava producing regions in Brazil, thereby stimulating the development of resistant varieties for efficient management of this nematode. This study aimed to assess the penetration, development, reproduction, and induced cellular responses of M. enterolobii in roots of four species of the genus Psidium (P. guajava‘Paluma’, P. guineense, P. cattleyanum, and P. friedrichstalianum) from the Active Germplasm Bank (BAG) of the Center for Agricultural Research of the Semi-arid Tropics (Embrapa Semi-arid) located in Petrolina, PE, Brazil. Three experiments were carried out to assess the penetration, development, and reproduction of the nematode and, subsequently, histological analyses were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Guava root-knot nematode; Psidium cattleyanum; P. friedrichstalianum; P. guajava; P. guineense; Resistance. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000200402 |
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| Biffi,CP; Stefani,LM; Miletti,LC; Matiello,CA; Backes,RG; Almeida,JM; Neves,GB. |
| Isolates of Salmonella sp (104) from poultry samples were isolated and serotyped where eleven were identified as Salmonella Typhimurium (ST). ST isolates were phenotypically tested by disk diffusion and minimum inhibitory concentration (MIC). Four genes related to enrofloxacin (GyrA, GyrB, ParC and ParE), two to gentamicin (AadA and AadB) and two to ceftiofur (BlaCMY-2 and AmpC) resistance were searched by PCR. Our results showed ST resistance to all three antibiotics tested (18.1% for ceftiofur, 45.4% for gentamicin, and 18.1% for enrofloxacin) according to the diffusion test. In the MIC test, the ST isolates showed higher levels of resistance (27.2% for ceftiofur, 54.5% for gentamicin, and 18.2% for enrofloxacin). Three resistance genes out of four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial; Gene; Resistance; Salmonella. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200013 |
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| Neri,Vanessa dos Santos; Sarmento,José Lindenberg Rocha; Borges,Laylson da Silva; Torres,Tatiana Saraiva; Sena,Luciano Silva; Oliveira,Max Brandão de; Sousa Júnior,Antônio de. |
| Abstract: The objective of this work was to phenotypically characterize creole goats of the Moxotó, Azul, Canindé, Repartida, Marota, and Graúna breeds, comparing them with the Boer, Anglo Nubian, and Alpine exotic breeds, to identify the genetic groups of greater potential for carcass quality and resistance to infection caused by worm. Data on morphometric measurements were obtained for the count of worm eggs in grams of feces (WEGF), Famacha score, carcass measurements, and body weight from 308 animals, in a farm in the state of Piauí, Brazil. Repartida goats showed the highest average for wither height (61.55 cm) and rump height (62.16 cm), and Moxotó goats had the greatest ear length (13.45 cm). The Moxotó breed showed the highest means for carcass and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carcass traits; Genetic resources; Morphometry; Resistance. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000700849 |
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| Trianoski, Rosilani; Matos, Jorge Luis Monteiro de; Iwakiri, Setsuo. |
| The Australian cedar (Toona ciliata M. Roem) is a species of high commercial value, with characteristics similar to native mahogany and cedar, which has been highlighted in forest plantations in Brazil, whose wood should be the subject of technological research. The objective of this study was to evaluate the physical, chemical and mechanical properties from planted stands of 18 years old. The wood showed low density (0.330 g cm3), low average dimensional stability (anisotropy: 2.22), high content of extractives (10.33%) and moderate mechanical properties: MOR and MOE to bending: 498 kgf cm-2 and 66,163 kgf cm-2; MOR and MOE for parallel compression: 258 kgf cm-2 and 100.813 kgf cm-2; shear: 82 kgf cm-2 and medium hardness: 208 kgf. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Exotic species; Resistance; Dimensional stability; Extractives; Toona ciliata Tecnologia e utilização de Produtos Florestais - Propriedades da madeira Espécie exótica; Resistência; Estabilidade dimensional; Extrativos; Toona ciliata. |
| Ano: 2014 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/523 |
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| Furtado,Dermeval A.; Castro,Thiago B. de S.; Lopes Neto,Jose P.; Constantino,Rodrigo A.; Cunha,Maria das G. G.; Nascimento,José W. B. do. |
| ABSTRACT Feed supplementation with multinutrient blocks (MB) for sheep and goats can be a viable alternative in the Brazilian semiarid region, and it is necessary to set an ideal hardness to obtain maximum feed efficiency. Therefore, this study aimed to evaluate the manufacture of MB using five binders: Portland cement, lime, kaolin, Portland cement + kaolin and lime + bentonite, at two percentages (7.5 and 10%) and two healing times (72 and 96 h). The experimental design was completely randomized in a 5 x 2 x 2 factorial scheme (binders, percentages and healing times, respectively), with five repetitions. Using lime in the MBs led to greater resistance in the specimens (208.53 kPa), as well as the greater percentage of binders (10%), ensuring higher... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water absorption; Hardness; Resistance; Feed supplementation. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000800558 |
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| Registros recuperados: 255 | |
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