JBAS Articles
JBASV8N2A22- Performance of some Promising Genotypes of Soybean Under Different Planting Dates Using Biplots Analysis
Journal of Basic and Applied Sciences - Volume 8 Number 2
Performance of some Promising Genotypes of Soybean Under Different Planting Dates Using Biplots Analysis
A.A. Kandil, A.E. Sharief, A.R. Morsy and A.I. Manar El-Sayed
http://dx.doi.org/10.6000/1927-5129.2012.08.02.22
Abstract: Soybean yield is affected by planting dates and there are significant efficiency losses when planting are done outward a relatively restricted period. Genotypes and environment are major contributing factor of plant phenotype. Economically important quantitative traits include agronomic characteristics. Four separate experiments are carried out in each season at the experimental farm of Sakha Research Station, Kafr El-Sheikh during 2010 and 2011seasons. Seed yield of six soybeans cultivars i.e. Giza 21, Giza 22, Giza 111, H2L12, H30 and H32 examined at four different sowing dates i.e. 20th April, 5th May, of 20th May and 5th June of their effect on seed yield, and yield components. Highest number of branches/plant, number of pods/plant, 100 seed weight (g), and seed yield. Soybean cultivars showed high difference in seed yield and its component, Giza 21 exhibited maximum number of pods/plant, 100 seed yield, and seed yield. H32 cultivar contributed highest number of branches/plant. Through genotypes and genotypes x environment biplots of regression model analysis results, the performance of a cultivar at different environments was compared, the performance of six cultivars at different environments (planting dates) were compared. The results indicated that sown on 5th May increased seed yield/ha by 19.7% compared with sown on 5th June and increased seed yield by 17.9% compared with sown on 20th April, and increased seed yield by 10.3% compared with sown on 20th May. It could be noticed that Giza 21 cultivar exceeded H32 line by 16.63%, H30 line by 14.6%, Giza 22 cultivar by 13.7%, H2L12 line by 6.5% and Giza 111 by 5.3% in seed yield/ha. Highest yielding cultivars at the different mega environments were identified, and ideal cultivars and test planting date was identified. It could be suggested that soybean genotypes of Giza 21 and Giza 111 are the most promising for planting date 5th May and recorded concentrated seed yield/ha.
Keywords: Soybean genotypes, sowing dates, biplots analysis, seed yield and yield attributes.
JBASV8N2A15 - Seroprevalence of Avian H9N2 Influenza Virus in a Population of Iranian Domestic Dogs
Journal of Basic and Applied Sciences - Volume 8 Number 2
Seroprevalence of Avian H9N2 Influenza Virus in a Population of Iranian Domestic Dogs
Mohammad Abbaszadeh Hasiri, Saeed Nazifi, Elham Mohsenifard and Maryam Ansari-Lari
http://dx.doi.org/10.6000/1927-5129.2012.08.02.15
Abstract: The prevalence of H9N2 influenza virus in dogs was first time observed in Fars province of Iran. A total of 182 dogs were selected from the clinical cases at the Small Animal Clinic of Veterinary Medicine School, Shiraz University. After obtaining history, physical examination was performed and blood samples were obtained for serological examination (Eliza and HI assay) for the detection of H9N2-specific antibodies. Associated factors (age, breed, diet, place, presence of other dogs, general symptoms, respiratory and gastrointestinal signs) were also evaluated. The positive results showed that 81.7 % of ELISA positive cases had titer ≥ 32 for H9N2 influenza in HI test. Although positive result were found more in dogs with general or respiratory signs, no significant differences were observed in the evaluated factors and seropositivity. This research showed high seroprevalence of Ab against H9N2 in dogs and made this hypothesis that H9N2 may be important in dogs in virus persistence. Additional research is needed for detection of epidemiologic role of dogs in transmission and pathogenesis of H9N2 in dogs and humans.
Keyword: Canine influenza virus, Avian influenza virus, H9N2, Dog, Iran, Seroprevalence.
JBASV8N2A16- Immobilization of Leuconostoc-paramesenteroides Dextransucrase Enzyme and Characterization of its Enzyme Properties
Journal of Basic and Applied Sciences - Volume 8 Number 2
Immobilization of Leuconostoc-paramesenteroides Dextransucrase Enzyme and Characterization of its Enzyme Properties
Amal M. Hashem, Mona A. El-Refaei, Hasan M. Gebril and Ahmed F. Abdel-Fattah
http://dx.doi.org/10.6000/1927-5129.2012.08.02.16
Abstract: Dextransucrase from Leuconostoc-paramesenteroides was immobilized using different immobilization techniques. Entrapment in calcium alginate (2%) proved to be the most suitable technique (27.6% yields). The operational stability of the immobilized was retained 100% until 11 cycle, with decreasing of 70%, of the retained activity at 13 cycles. The specific activity of the free was compared to that of the immobilized enzyme. The optimum temperature of the free enzyme was 65°C were as it was 70°C with the immobilized enzyme. The specific activity of the immobilized was higher than that of the free enzyme at pH 4. 100% of the specific activity was retained due to the thermal stability of the immobilized enzyme after heat treatment for 60 minutes at 60°C. The activation energy (EA) of the immobilized enzyme was lower than that of the free enzyme (EA= 10.3 and 12.13 Kcal/mol respectively). The calculated half-lives of the free enzyme at 40, 50, 60 and 70 were 15.0, 4.68, 4.68 and 4.0 min respectively which were lower than those of immobilized enzyme i.e. 401, 385, 295 and 42 min, respectively.
Keywords: Dextransucrase, enzyme immobilization, calcium alginate, Leuconostoc.
JBASV8N2A17- Arbuscular Mycorrhizal Colonization in Five Tropical Forest Tree Legumes of Chittagong University Campus in Bangladesh
Journal of Basic and Applied Sciences - Volume 8 Number 2
Arbuscular Mycorrhizal Colonization in Five Tropical Forest Tree Legumes of Chittagong University Campus in Bangladesh
Nure Ferdousee, Khaled Misbahuzzaman and A.T.M. Rafiqul Hoque
http://dx.doi.org/10.6000/1927-5129.2012.08.02.17
Abstract: Arbuscular mycorrhizal (AM) colonization in five tropical forest tree legumes (Gliricidia sepium, Dalbergia sissoo, Indigofera tysmanii, Delonix regia and Samanea saman) was investigated in Chittagong University (CU) campus. The results of the present study clearly suggests that, Vesicular AM fungi (VAM) are common in all the studied forest tree species, and that the studied forest tree species differ in their rates of AM formation. The intensity of colonization is maximum (98%) in I. tysmonii followed by D. sissoo (95%), D. regia (63%), S. saman (59%) and G. sepium (52%). Coiled structures of hyphae were recorded in D. regia. Arbuscule formation was recorded in D. sissoo and in I. tysmonii. Mycorrhizal spores were found in rhizosphere soils of all the sites. Glomus, Acaulospora, Entrophospora and Gigaspora spores were identified in all the hosts. Forest plants differ in their rates of AM formation. Edhapic conditions like moisture content, soil pH also influence the extent of root colonization.
Keyword: Mycorrhizae, Legume, Colonization, Edhapic condition, Rhizosphere, Underground networking.