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RB966928: Early maturing sugarcane cultivar
Daros, Edelclaiton;Bespalhok Filho, Jo?o Carlos;Zambon, José Luis Camargo;Ido, Oswaldo Teruyo;Oliveira, Ricardo Augusto de;Ruaro, Lucimeris;Weber, Heroldo;
Crop Breeding and Applied Biotechnology , 2010, DOI: 10.1590/S1984-70332010000300016
Abstract: rb966928 is an early to medium maturing sugarcane cultivar and in central-southern brazil it is harvested between april and june; it is recommended for planting in environments with medium to high soil fertility. it stands out with a high ratoon yield and with excellent sprouting in both plant cane and ratoon cane. it is tolerant to the major diseases of economic importance of sugarcane.
Inbreeding in sugarcane varieties
Silva, Marcelo de Almeida;Gon?alves, Paulo de Souza;
Ciência Rural , 2011, DOI: 10.1590/S0103-84782011005000028
Abstract: sugarcane species are allogamous, i.e. selfing is expected to reduce plant vigor. this study was undertaken to obtain and evaluate first-generation inbred lines that may be used for further crosses and determine the extent of inbreeding depression in sugarcane. in this research, 26 parental varieties were self-pollinated to obtain about 19,000 seedlings. results showed that it is possible to segregate different traits in a given variety and find lines with promising outcome for all assessed characteristics. the soluble solids segregation observed in low and even high-brix varieties increases the possibility of quick improvement in this trait. self-pollination did not produce a general loss in yield traits such as soluble solids, stalk number and stalk diameter in any of the 26 varieties, but both stalk height and stalk weight showed strong inbreeding depression. selfing-derived clones can be used to produce hybrid vigor in crossings.
Stability and adaptability of early maturing sugarcane clones by AMMI analysis  [PDF]
Edson Perez Guerra,Ricardo Augusto de Oliveira,Edelclaiton Daros,José Luís Camargo Zambon
Crop Breeding and Applied Biotechnology , 2009,
Abstract: Stability and adaptability of 14 early maturing sugarcane clones were evaluated at 11 locations in the State ofParaná, in the plant cane and ratoon cycles, by the AMMI method. By AMMI2, 59.44% cumulative variance was explained inplant cane and 54.22% in ratoon cane by the first two principal components of tons of pol per hectare (TPH). For genotypeRB966928 the TPH was medium to high, phenotypic stability high and adaptability general, recommending this early maturingclone with wide adaptability for northern Paraná. The genotype-environment interaction was lowest in Paranavaí andMandagua ú (most stable locations), where the ranking of genotypes was more reliable than the means of the environmentstested.
Isozyme Analysis on Different Varieties of Sugarcane  [PDF]
Johnson M.,Janakiraman N.,Irudayaraj V.
Journal of Stress Physiology & Biochemistry , 2012,
Abstract: Isozymic and protein diversity among five sugarcane varieties viz., Co 6304, Co 85019, Co 8371, Co 89003 and Co 91010 were studied to understand the varietal interrelationship and to identify the biochemical marker for the disease resistance and stress tolerance. The standard technique of vertical gel electrophoresis PAGE was employed for size separation of isozymes. The gel was stained with different staining solutions for different isozyme systems viz. peroxidase, esterase, acid phosphatase, alkaline phosphatase and proteins. Rf values of the banding profiles, similarity index and variation between the varieties were analysed. Among the four enzyme systems, peroxidase profile reveals the difference between the disease resistant / susceptible and abiotic stress tolerant / non tolerant varieties. The two isoperoxidase bands with Rf values 0.62 and 0.66 showed their presence in disease resistant and abiotic tolerant varieties. The presence of two marker bands (0.62, 0.66) of resistant and stress tolerant varieties suggest that the variety Co 6304 may also be resistant to smut, wilt and moderately resistant to red rot and tolerant to drought.
Morphological Characters of Some Exotic Sugarcane Varieties  [PDF]
Maqbool Akhtar,Nosheen Noor Elahi,M. Ashraf
Pakistan Journal of Biological Sciences , 2001,
Abstract: Six exotic varieties of sugarcane (CP84-1198, CP85-1491, CP88-1165, CP77-400, CP89-846, TCP86-3368) planted at the National Agricultural Research Centre during 1998-99 were described for their morphological characters. All the varieties greatly varied in different characters. Mean leaf length, number of green leaves and width of leaf lamina/blade was different in different varieties. These varieties also differed in leaf sheath colour, carriage, and other leaf characters. Shape of the dewlap, its size and colour, shape of ligule and ligular process or auricle was also different. All the varieties varied in diameter of the stalks, colour of the stalks, shape of internode, bud groove characters, width and colour of growth ring, width and colour of root zone and wax band characters. Ivory markings were present on stalks of all the varieties. All the varieties were similar in bud size, but different in shapes of the bud, some having flanges and some without flanges. Position of the germ pore on the bud was also different in all the varieties.
Bromatological characteristics and in vitro digestibility of four sugarcane varieties subjected or not to the application of quicklime
Oliveira, Mauro Dal Secco de;Rêgo, Aníbal Coutinho do;Sforcini, Mariana Paula Rossi;Freitas Júnior, José Esler;Santos, Juliana dos;Carvalho, Marina Vieira de;
Acta Scientiarum. Animal Sciences , 2012, DOI: 10.4025/actascianimsci.v34i4.13775
Abstract: the experiment was conducted to evaluate the bromatological characteristics and the in vitro digestibility of four sugarcane varieties, subjected or not to hydrolysis, with quicklime. a completely randomized design was employed with three replications arranged in a 4 × 2 factorial scheme, with four sugarcane varieties (sp 52454, rb 867515, rb 855536 and iac 862480), hydrolyzed or not. there was significant effect on brix (p < 0.05) and industrial fiber (p < 0.05), and iac 862480 variety had the lowest levels of industrial fiber. there were no significant difference (p > 0.05) in neutral detergent fiber, acid detergent fiber and lignin levels among the sugarcane varieties under analysis and for the sugarcanes, hydrolyzed or not. the use of sugarcane hydrolysis with 1% quicklime improves the in vitro digestibility of ndf and adf, regardless of the variety studied. hydrolysis with 1% quicklime did not alter the sugarcane chemical composition.
Induction of somatic embryogenesis in different varieties of sugarcane (Saccharam officinarum L.)
Ravindra B. Malabadi,Gangadhar S. Mulgund,K. Nataraja,S. Vijaya Kumar
Research in Plant Biology , 2011,
Abstract: This investigation for the first time highlights TDZ induced callus formation, somaticembryogenesis and plant regeneration using leaf explants of different varieties (Co94032,CoC671, Co86032, SNK754, SNK61 and SNK44) of sugarcane (Saccharam officinarum). Leafexplants cultured on the full strength inorganic salts Murashige and Skoog (1962) basalmedium supplemented with 4.52 μM 2, 4-D and 4.54 μM TDZ induced embryogenic tissueafter 3-4 weeks. The percentage of somatic embryogenesis was not similar in all the testedvarieties of sugarcane. This study indicates a high embryogenic potential of leaf explants oftested sugarcane varieties, and also opened up the possibility for large-scale clonalpropagation of sugarcane for the genetic improvement programmes.
In vitro Micropropagation of Some Important Sugarcane Varieties of Bangladesh
M.A. Mamun,M.B.H. Sikdar,Dipak Kumar Paul,M. Mizanur Rahman
Asian Journal of Plant Sciences , 2004,
Abstract: In vitro micropropagation of sugarcane variety viz., Isd-28 and Isd-29 have been studied. Nutrient media containing growth regulators enhanced callus induction, shoot differentiation and root formation in vitro. For covenant experiment, surface sterilization of the explants from the field grown plants was essential and sterilization with 0.1% HgCl2 for 8 min was satisfactory. In this treatment, 85-90% of the leaf sheath explants was Contamination free. Among the explants cultured for proliferation fortified with 3.0 mg L-1 2, 4-D explants of all the 2 varieties of sugarcane showed the best performance for the callus induction after 16-20 days of culture. The concentration of BA tested 1.5 mg L-1 of the cytokinin produced comparatively higher percentage of shoot proliferation. Different concentration of BA mg L-1 in combination with different auxin viz., IAA, IBA and NAA were tested for shoot proliferation. Isd-28 and Isd-29 showed best shooting when media were supplemented with BA 1.5 mg L-1+0.5 mg L-1 NAA. In vitro proliferated shoots were rooted on MS and modified MS media. Best results of rooting ware observed on modified MS medium supplemented with auxins (NAA+IBA) 0.5 mg L-1 and 0.5 mg L-1 showed fair results. Eighty to ninety percent regenerated plantlets were viable at normal temperature with 85% humidity while transferred sterilized soil.
Polyphasic characterization of Gluconacetobacterdiazotrophicus isolates obtained from different sugarcane varieties
Guedes, Helma V.;Santos, Samuel T. dos;Perin, Liamara;Teixeira, Kátia R. dos S.;Reis, Veronica M.;Baldani, José I.;
Brazilian Journal of Microbiology , 2008, DOI: 10.1590/S1517-83822008000400023
Abstract: a polyphasic approach was applied to characterize 35 g. diazotrophicus isolates obtained from sugarcane varieties cultivated in brazil. the isolates were analyzed by phenotypic (use of different carbon sources) and genotypic tests (ardra and risarflp techniques). variability among the isolates was observed in relation to the carbon source use preference. glucose and sucrose were used by all isolates in contrast to myo-inositol, galactose and ribose that were not metabolized. the results of the analysis showed the presence of two groups clustered at 68% of similarity. the genetic distance was higher when risa-rflp analysis was used. analysis of 16s rdna sequences from isolates showed that all of them belonged to the g. diazotrophicus species. neither effect of the plant part nor sugarcane variety was observed during the cluster analysis. the observed metabolic and genetic variability will be helpful during the strain selection studies for sugarcane inoculation in association with sugarcane breeding programs.
Response of micropropagated sugarcane varieties to inoculation with endophytic diazotrophic bacteria
Oliveira, André Luiz Martinez de;Canuto, Erineudo de Lima;Reis, Ver?nica Massena;Baldani, José Ivo;
Brazilian Journal of Microbiology , 2003, DOI: 10.1590/S1517-83822003000500020
Abstract: previous studies estimated that sugarcane could obtain up to 60% of total nitrogen accumulated from bnf. here a mixture of five endophytic diazotrophic strains was tested in a field trial, inoculated in two micropropagated sugarcane varieties and three locals, to determine the effects on commercial crop conditions. the sugarcane plantlets were inoculated in vitro, and after 17 months of growing in the field, the productivity and bnf contribution showed to be influenced by the plant genotype and soil type. the highest bnf contributions was observed in the poorest soil for both varieties. smaller increases in productivity were observed for sp 701143 variety grown in soil with low or medium fertility. in contrast, a decrease in the stem productivity was observed in the sp 813250 variety grown in the three localities.
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