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Search Results: 1 - 10 of 883 matches for " Sorghum bicolor "
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Genetic Diversity in the Environmental Conditioning of Two Sorghum (Sorghum bicolor L.) Hybrids  [PDF]
John J. Burke, Yves Emendack, Chad Hayes, Junping Chen
American Journal of Plant Sciences (AJPS) , 2018, DOI: 10.4236/ajps.2018.94063
Abstract: Sorghum metabolism continually adapts to environmental temperature as thermal patterns modulate diurnally and seasonally. The degree of adaptation to any given temperature may be difficult to determine from phenotypic responses of the plants. The present study was designed to see if the efficiency of quantum yield of photosystem II could be used as a measure of how well leaf tissue metabolism was able to withstand a prolonged respiratory demand caused by elevated temperatures. The efficiency of quantum yield values of Pioneer 84G62 and Northrup King KS585 commercial sorghum hybrids showed that when the hybrids were grown in a 28°C/20°C day/night cycle in the greenhouse or the field, Pioneer hybrid 84G62 withstood subsequent elevated thermal challenges better than Northrup King KS585. The same hybrids grown in a 39°C/32°C day/night cycle showed similar efficiency of quantum yield values when thermally challenged. Water-deficit stress increased the heat resistance of the tissue raising the efficiency of quantum yield of both lines to the same level. Upon recovery from the water deficit stress the differential efficiency of quantum yield values between the two lines re-appeared. The data provided in this study suggest a metabolic advantage of Pioneer 84G62 to environmental thermal challenges compared with the Northrup King KS585.
Effect of pollination time on seed set in short glume sorghum in Yola, Nigeria
D Bello
Journal of SAT Agricultural Research , 2008,
Abstract: Studies on the effect of time of pollination on seed set and viability in short glume sorghum were conducted on theTeaching and Research Farm of the Department of CropProduction and Horticulture, Federal University ofTechnology (FUT), Yola, Nigeria. Two sorghum cultivarswere used. The treatments were six different timings onwhich controlled pollination was carried out, afteremasculating the female flowers. These timings included24, 27, 30, 48, 51 and 54 h. Data were collected on sevenparameters, namely number of seed set per time, weight of30 F1 seeds, percentage germination, vigor score, time to50% flowering, time to maturity and yield per plant tofurther establish seed viability. The data were subjected toanalysis of variance based on randomized complete blockdesign. Results showed that pollination conducted within27–48 h out-performed others conducted at other timingssuggesting therefore that 27–48 h as the right time toperform crosses on sorghum in Yola environment.
A antracnose do sorgo
Costa, Rodrigo V. da;Casela, Carlos R.;Zambolim, Laércio;Ferreira, Alexandre S.;
Fitopatologia Brasileira , 2003, DOI: 10.1590/S0100-41582003000400001
Abstract: anthracnose, caused by colletotrichum graminicola, has been the most destructive disease affecting sorghum (sorghum bicolor) crops in brazil. three phases of the disease are recognized: foliar anthracnose, anthracnose stalk rot, and panicle and grain anthracnose. foliar anthracnose, the most destructive phase of the disease, usually appears 30-40 days after emergence, during growth stage 4.0 or later. colletotrichum graminicola may survive as mycelium, conidia and microsclerotia, up to 18 months in crop debris, on or above the soil surface, in alternate hosts, and as mycelium in infected seeds. microsclerotia are produced in sorghum stalks of susceptible cultivars and survive better in crop debris on the soil surface. this pathogen is a highly variable organism, as demonstrated through virulence on differential host genotypes and molecular markers. implications of this variability on the development of management strategies through genetic resistance are discussed in this paper.
Comportamento da cultura do sorgo em fun??o do tipo de rodas compactadoras e cargas verticais impostas na opera??o de semeadura
Cortez, Jorge W.;Carvalho Filho, Alberto;Silva, Rouverson P.;Furlani, Carlos E. A.;Simonis, Daniel B.;
Engenharia Agrícola , 2006, DOI: 10.1590/S0100-69162006000200014
Abstract: sorghum can be cultivated in areas and environmental situations droughts and hot, which other cereals productivity is uneconomical. when sorghum sowing is accomplished in an efficient way benefits can be verified in productivity. the objective of this work was to evaluate the behavior of sorghum sowed under three levels of vertical load imposed on the press wheels of the seeder. the experiment was carried out in fazu - faculdades associadas de uberaba (mg), brazil, with plots arranged in randomized complete block design in split-plot, with three models of press wheels and three vertical loads with five repetitions. it was observed that there were not effect of the press wheels and loads treatments in relation to the days for emergency, but the lineal regression showed significant for vertical load. the height, the medium moisture of the plants and the production of green and dry matter of the sorghum did not differ among the treatments.
Efecto de la inoculación con Bradyrhizobium sp. y de la fertilización nitrogenada en dos variedades de sorgo grano (Sorghum bicolor L. Moench)
Bécquer,C. J; Nápoles,J. A; Fajardo,N. F; Palmero,L. A; ávila,U; álvarez,Orquidia; Ramos,Yamilka; Quintana,Maribel; Galdo,Yaldreisi; Vega,Susana;
Pastos y Forrajes , 2012,
Abstract: a field trial was conducted in order to determine the response of two sorghum varieties (ciap-2e and sorgo cebada) to chemical fertilization and biological fertilization with rhizobia, as well as the interaction of the studied factors. an isolated strain of centrosema plumieri, belonging to bradyrhizobium sp., was used. the experimental design was divided plots, with three treatments (inoculated, fertilized and absolute control), two sub-treatments (var. ciap-2e and sorgo cebada) and four replications. the fertilized treatment consisted in an application of 150 kg n/ha (urea) 20 days after planting. the factor fertilization type was not observed to influence by itself the experimental results; it rather interacted with the factor variety. inoculated sorgo cebada had a yield of 4,09 t/ha and did not differ from fertilized sorgo cebada (3,52 t/ha) and fertilized ciap-2e (3,12 t/ha). the variety ciap-2e, independently from the fertilization type, turned out to be agronomically promising, for its results in the weight of 1 000 grains (27,3 g). inoculating with the hg2 strain the crops sorgo cebada and ciap-2e is recommended, under similar conditions as the ones in the trial, and conduct further physiological studies on the response of different sorghum genotypes to bacterial inoculation.
Caracterización y potencialidades del grano de sorgo (Sorghum bicolor L. Moench)
Pérez,A; Saucedo,O; Iglesias,J; Wencomo,Hilda B; Reyes,F; Oquendo,G; Milián,Idolkys;
Pastos y Forrajes , 2010,
Abstract: sorghum (sorghum bicolor l. moench) is one of the cereals that due to their agronomic and nutritional characteristics could contribute large benefits in human as well as animal feeding, at world, tropical and national level. this crop is well adapted to cuban conditions, and showed an incipient development that disappeared parallel to the collaboration of comecon (council of mutual economic assistance). today no vast tradition and experience exist regarding its production; however, different essays indicate that the yields are satisfactory and that they could be increased if there were appropriate and sustainable technologies that allowed to express all its potential. in this article the general, botanical and agronomic characteristics of the genus and its species, as well as its potential and usages are presented with the objective of updating knowledge as a contribution to providing solutions for the current food crisis undergone by the planet. likewise, some results obtained in the republic of cuba are included.
Tratamento de sementes de sorgo com inseticidas
Vanin, Alisson;Silva, Alessandro Guerra da;Fernandes, Camila Pereira Caixeta;Ferreira, Wenderson Sousa;Rattes, Jurema Fonseca;
Revista Brasileira de Sementes , 2011, DOI: 10.1590/S0101-31222011000200012
Abstract: seed treatment with insecticides is an effective tool in integrated pest management, but information on selective products to treat sorghum seeds is limited. the objective of this study was to evaluate the effects of treating sorghum seeds with insecticides containing one or two active ingredients, with and without storage for 30 days, on the early plant development. the experiment was conducted at fesurv-universidade de rio verde, in rio verde-go, using ten insecticides (thiodicarb, fipronil, acephate, thiamethoxam, imidacloprid, [imidacloprid+thiodicarb], imidacloprid+thiodicarb, imidacloprid+fipronil, thiamethoxam+thiodicarb, thiamethoxam+fipronil, plus a non-insecticide control, with and without 30 day seed storage. the results showed that storage of sorghum seeds treated with insecticides for 30 days reduced the germination percentage. the imidacloprid+thiodicarb mixture has more potential for treating sorghum seeds. the insecticide acephate causes more phytotoxicity to the sorghum seedlings compared to fipronil, thiamethoxam and the thiamethoxam+thiodicarb mixture. the insecticides did not adversely affect sorghum seed vigor.
Secagem e armazenamento de sementes de sorgo com alto e baixo teor de tanino
Oliveira, Jo?o Almir;Silva, Tanismare Tatiana de Almeida;Pinho, édila Vilela de Resende Von;Abreu, Luciana Aparecida de Souza;
Revista Brasileira de Sementes , 2011, DOI: 10.1590/S0101-31222011000400012
Abstract: water content in harvested seed and the drying temperature are fundamental for ensuring seed physiological quality, especially in sorghum, which may show secondary dormancy when dried at high temperatures. the objective of this study was to evaluate the physiological quality of sorghum seeds, with high and low tannin contents, stored after drying at different temperatures. seeds of the br 305(2.28 g tannin/100 g) and br 310 (0.52 g tannin/100 g) cultivars were collected with a water content of 18-20% and dried in the shade and in artificial dryers at temperatures of 35 °c, 45 °c and 35/45 °c until water content was 12%. after drying, the seeds were stored in a cold, dry chamber for 0, 3 and 6 months. for each storage period the seeds were evaluated with germination, tetrazolium, electric conductivity, emergence velocity index, cold, scanning electron microscopy and enzyme profile tests. tannin concentration was also measured. high tannin seeds showed 88.5% germination when dried at 45 °c and stored for 6 months. dormancy increased in both batches for seeds dried at 35 °c and with increased tannin concentration at six months storage.
Adaptabilidade e estabilidade de genótipos de sorgo granífero em diferentes ambientes do estado do Ceará
Cysne, Júnior Régis Batista;Pitombeira, Jo?o Bosco;
Revista Ciência Agron?mica , 2012, DOI: 10.1590/S1806-66902012000200009
Abstract: adaptability and stability the grain sorghum genotypes (dkb 860, dbk 57, 822, shs 400, 741, ag 1018, br 304, saara and 740) were evaluated at seven environments of the state of ceara, from 2002 to 2004. it was, used the linear regression coefficient (β) as an estimate of adaptability, and the deviations mean squares from the regression (σ2), as a measure of stability of according with the model proposed by eberhart and russell. it was observed statistically significant (p < 0.01) regarding the effects of environment, genotype, and genotype x environment interaction. the genotype dkb 57 has requirements of a desirable genotype, with (β = 1.25 and r2 = 96.44) indicating that its grain yield increase with the improvement of the environmental conditions and has a high coefficient of determination thus ensuring its stability. it also used the method of cruz to justify and confirm the effect of genotype x environment interaction in order to provide a recommendation with more security for the genotype shs 400 that presented a high average, b1 <1 and b1 + b2> 1, among the materials evaluated. the yield stability of the genotypes ag 1018 and saara it is an interesting alternatives for recommendation to farmers of the state of ceara. the yield stability of the other genotypes indicates that they are little adapt tied to the environmental conditions in the state of ceara.
Inheritance of Anthracnose Resistance for the Sorghum Cultivar Redlan
John E. Erpelding
Plant Pathology Journal , 2007,
Abstract: To determine the inheritance of resistance in Redlan, a F2 population was developed and evaluated at the USDA-ARS Tropical Agriculture Research Station in Isabela, Puerto Rico in 2005. Results of the disease evaluation indicated that foliar anthracnose resistance observed in Redlan is controlled by a single dominant gene. Anthracnose infection of the leaf midrib was also observed in the F2 population and results indicate resistance for midrib infection is controlled by a single recessive gene. Segregation analysis, based on the frequency of recombinants for foliar and midrib resistance, indicated that the two genes are unlinked.
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