@article { author = {}, title = {Yield and Ratooning Ability of Thirty Sugar Cane Genotypes}, journal = {Egyptian Journal of Agronomy}, volume = {37}, number = {2}, pages = {137-157}, year = {2015}, publisher = {National Information and Documentation Center (NIDOC), Academy of Scientific Research and Technology}, issn = {0379-3575}, eissn = {2357-0288}, doi = {10.21608/agro.2015.199}, abstract = {AN EXPERIMENT field was conducted at El- Mattana ........Agricultural Research Station, Luxor Governorate, to evaluate the yield and ratooning ability of 30 sugarcane genotypes (clones) along with the check cultivar G.T 54/9 during three different crop cycles; plant cane (PC), first ratoon (FR), and second ratoon (SR) crops during 2011/2013 harvesting seasons. A randomized complete block design with three replicates was used. Results indicated that the evaluated genotypes varied significantly (P = 0.05) within and among crop cycles for stalk length, stalk diameter, stalk density, stalk weight, stalks number, cane yield, Brix, sucrose content, purity, sugar recovery and sugar yield. The evaluated genotypes differed significantly in their ratooning ability (RA) for all studied traits. Over evaluated genotypes, means of stalk diameter, stalk weight, stalk density and cane yield in plant cane were higher than those in the first and second ratoon crops, while means of Brix, sucrose, purity and sugar recovery percentages in the second ratoon were higher than those in plant cane and first ratoon crops. The relative influence of genotypic variance (d2g) in determining the phenotypic variance was primary to genotype by crop interaction variance (d2gc) and error variance (d2e) for all studied traits. Broad sense heritability (H%) estimates were high for cane yield and its components as well as sugar yieldsince it ranged from 82.53% for cane yield to 95.06% for stalk length. High genotypic coefficient of variation (GCV%) estimates was for stalk weight ( 27.01%), stalk density (39.36 %) and stalk number (32.57 %), while low estimates were for stalk length and juice quality traits (2.05% ≤ GCV% ≥ 7.99%). Genotypic variance (d2g) was primary to error variance (d2e) for RA of cane yield and its components as well as sugar yield and juice quality traits. The highest heritability estimates of RA were for stalk weight (98.10 %), stalk density (98.24%), stalk number (99.46%) and sugar yield (96.73%) with high estimates of genotypic coefficient of variation (GCV) for the same traits (22.78%, 32.26%, 36.41% and 27.26%, respectively).}, keywords = {Saccharum spp. Yield performance,Ratooning ability,Broad-sense genetic variance,Genotype by crop interaction variance (d2gc)}, url = {https://agro.journals.ekb.eg/article_199.html}, eprint = {https://agro.journals.ekb.eg/article_199_d1a52fc09fc47a912b9f5cda3ba0c540.pdf} } @article { author = {}, title = {Estimates of Genetic Variability, Correlation and Path Analysis in Sunflower ( Helianthus annuus L.)}, journal = {Egyptian Journal of Agronomy}, volume = {37}, number = {2}, pages = {159-176}, year = {2015}, publisher = {National Information and Documentation Center (NIDOC), Academy of Scientific Research and Technology}, issn = {0379-3575}, eissn = {2357-0288}, doi = {10.21608/agro.2015.200}, abstract = {TWELVE sunflower genotypes were evaluated for two years; 2013 ……and 2014 at three locations; Agricultural Research Stations of Shandaweel (location 1), Al-Arish (location 2) and El-Ewyinat east (location 3). Genotypic and phenotypic variances, their coefficient of variation, heritability and genetic advance were assessed. As well as study the interrelationships among oil yield attributers using genotypic and phenotypic correlation and path coefficients analysis were done. The experiments were conducted in a randomized complete block design with three replications in the field. Results proved that significant differences were observed among sunflower genotypes, for all studied characters in the three locations over two seasons. The elite genotype No 7 (Line120) surpassed the two check cultivar (Sakha 53 and Giza 102) recording the maximum values of seed yield in the first location with produced the maximum values in the second location for head diameter and seed yield and recording the maximum values of head diameter, seed yield and oil yield in the third location. Estimates of heritability in broad sense at the three locations were varied from; 26 - 97%, 29 - 96% and 57-97%, respectively. Results also indicated that, highly significant and positive correlation coefficients were obtained between oil yield and some studied traits at the genotypic and phenotypic levels in the three locations. According to path coefficients analysis (at genotypic and phenotypic levels), the traits, i.e. days to 50% flowering and plant height in location 1, days to 50% flowering, plant height, head diameter and 100-seed weight in location 2 and 100-seed weight and seed yield/plant in location 3 were important predictors of oil yield indicating their magnitude as selection criteria to obtain a valuable gain of selection for oil yield in sunflower.}, keywords = {Sunflower,genetic parameters,genotypic and phenotypic correlation coefficients,Path coefficients analysis,Oil yield components}, url = {https://agro.journals.ekb.eg/article_200.html}, eprint = {https://agro.journals.ekb.eg/article_200_aeee0265ebbe1d8ad7fdad6c671c41e6.pdf} } @article { author = {}, title = {Line × Tester analysis for Yield and its Attributes in Sesame ( Sesamum indicum L.)}, journal = {Egyptian Journal of Agronomy}, volume = {37}, number = {2}, pages = {177-208}, year = {2015}, publisher = {National Information and Documentation Center (NIDOC), Academy of Scientific Research and Technology}, issn = {0379-3575}, eissn = {2357-0288}, doi = {10.21608/agro.2015.201}, abstract = {THIS RESEARCH work was conducted at Shandaweel ResearchStation, Sohag, Egypt, to studythe combing ability and heterosis for yield and its attributes via Line × Tester analysis in sesame. Line × Tester mating design was applied in 2012 season using seven lines and four testers. In the two summers season, 2013 and 2014, twenty-eight F1 hybrids, their parents and one commercial variety (Shandaweel 3) as a check were evaluated. Mean squares due to genotypes and years via combined analysis for the two years were highly significant for all studied traits, except each of 1000-seed weight and oil percentage across years. Also, mean squares due to the interaction between genotypes × years were highly significant for all the studied traits, except days to 50% flowering, branches plant-1, and 1000-seed weight. The analysis revealed that high significant differences were found among crosses and lines for all the studied traits over the two years. Likewise, it appeared high significant differences among the four testers for all traits, except for 1000-seed weight. High significant variances were detected for line × tester interaction over years for all studied traits. In this context, results showed that significant and highly significant differences were found for all the studied traits for the interactions; crosses × year (except for length of fruiting zone, branches plant-1 and1000-seed weight), tester × year (except for height of the first capsule, number of branches plant-1 and 1000-seed weight) and parents × crosses × year (except for days to 50% flowering, number of branches plant-1, capsule length, 1000-seed weight and oil percentage). In general, the four crosses Giza32 × N.A.372, Shandaweel 2000 × Local 176, Shandaweel 2000 × H. 68 Family 21 and Shandaweel 2000 × N.A.652 were found to be the heaviest in most of the studied traits compared to their better parents. The parents N. A. 372, H.68 family 21 and Giza 32 were good combiners for improvement most studied traits. Also, desirable SCA effects were obtained for most studied traits. The crosses; Shandaweel 3 × local 176 and Shandaweel 2000 × N. A. 96 had the maximum SCA desirable effects for earliness. However, for seed yield plant-1 the crosses; Shandaweel 3 × N. A. 96, Shandaweel 2000 × Local 176, Giza 32 × N. A. 372, Sohag 1 × Local 166 and Sohag 1 × H. 68 Family 21 had most desirable SCA effects for seed yield plant-1 .}, keywords = {Sesame (Sesamum indicum L.),Line × tester analysis,Combining ability,Heterosis}, url = {https://agro.journals.ekb.eg/article_201.html}, eprint = {https://agro.journals.ekb.eg/article_201_82b625944b92b1b5bc99f61f0bf7ffaf.pdf} } @article { author = {}, title = {SRAP Markers Associated with Water Use Efficiency and Some Agronomic Traits in Wheat under Different Irrigation Regimes}, journal = {Egyptian Journal of Agronomy}, volume = {37}, number = {2}, pages = {209-229}, year = {2015}, publisher = {National Information and Documentation Center (NIDOC), Academy of Scientific Research and Technology}, issn = {0379-3575}, eissn = {2357-0288}, doi = {10.21608/agro.2015.202}, abstract = {FIFTY bread wheat lines were evaluated for drought tolerance and compared to six local cultivars under three water regimes (Well-watered = 0.8 Evapotranspiration (ETp), Mild drought stress = 0.6 ETp and severe drought stress = 0.4 ETp.). Eight agronomic traits were evaluated, i.e. days to heading, number of spikes/plant, 100-kernel weight (g), relative water content (%), chlorophyll concentration (μg cm-2), grain yield/plant (g), harvest index and water use efficiency (kg/m3) under normal and stress conditions. Analysis of variance showed highly significant variations among the tested lines. As an average of all tested lines chlorophyll concentration was the most affected trait by drought followed by grain yield per plant and WUE, while harvest index showed the lowest reduction due to drought stress. Five lines (1, 5, 11, 41 and 42) showed high performance in grain yield/plant and surpassed all local varieties under all conditions. The sequence related amplified polymorphism (SRAP) technique was used for the detection of markers associated with drought tolerance. SRAP was able to discriminate between the bulked-DNA of high and low performance lines in some evaluated traits under drought. Moreover, several unique and specific bands for high- and low-bulked lines were generated exposing the efficiency of SRAP in genotyping and diversity analysis. Evaluation of WUE showed its efficiency in differentiating among the tested lines and was in agreement with SRAP analysis which showed the maximum number of specific markers when the high- and low-WUE bulks were compared, unlike the other traits.The generated bands could serve preliminarily as selectable markers for drought tolerance in wheat.}, keywords = {Triticum aestivum ,Water deficit,molecular markers,Grain yield}, url = {https://agro.journals.ekb.eg/article_202.html}, eprint = {https://agro.journals.ekb.eg/article_202_e5685b0228732f2a6b052c1cac75b564.pdf} } @article { author = {}, title = {Nitrogen and Water Utilization Efficiency of Barley Subjected To Desiccated Conditions in Moderately Salt-Affected Soil}, journal = {Egyptian Journal of Agronomy}, volume = {37}, number = {2}, pages = {231-249}, year = {2015}, publisher = {National Information and Documentation Center (NIDOC), Academy of Scientific Research and Technology}, issn = {0379-3575}, eissn = {2357-0288}, doi = {10.21608/agro.2015.203}, abstract = {TRANSLOCATION of dry matter (DM) and nitrogen (N) in …. barley (Hordeum vulgare L. Giza 2000) subjected to desiccated conditions during pre and post heading in moderately salt-affected soil are important for food production. Nitrogen and water utilization efficiencies are paid an attention in the current investigation and prospected into account of both economic production and environment. The aim of the current study was to investigate the effects of water treatments [fully watering (FW) and desiccated watering (DW)] in response to five N applications 0, 35, 70,105 and 140 kg N ha-1 (0,15,30,45 and 60 kg N fed.-1) (ha.=2.38 fed) on N harvest index (NHI), N and DM translocation, N contribution, nitrogen use efficiency (NUE), nitrogen utilization efficiency (NUtE), N uptake efficiency (NUpE), apparent fertilizer N recovery (AFNR) and water utilization efficiency (WUtE) of barley. The application of either 105 or 140 kg N ha-1 resulted in the highest grain yield, NHI, DM translocation, N contribution and WUtE. Increasing the N application up to 70 kg N ha-1 resulted in the highest NUpE. NUE and NUtE were increased by increasing N application from 35 to 70 kg N ha-1, and were decreased gradually when higher N application was applied. On the other hand, there were no significant differences between the effects of water treatments on all above mentioned parameters, this could due to the timing of water application during water deficit. In conclusion, there were no significant between water treatments in terms of NHI, N and DM translocation, N contribution, NUE, NUtE, N uptake efficiency (NUpE), AFNR and WUtE, which support the hypothesis of better performance for barley plants when grown in desiccated conditions at 105 kg N-1 in moderately salt-affected soil.}, keywords = {Barley,Apparent fertilizer N recovery,Nitrogen fertilization,nitrogen utilization efficiency,water utilization efficiency}, url = {https://agro.journals.ekb.eg/article_203.html}, eprint = {https://agro.journals.ekb.eg/article_203_14062540969d3c516a87082f44c6d71d.pdf} }