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ผลงานตีพิมพ์ในวารสารวิชาการAssociation and expression analysis of porcine HNF1A gene related to meat and carcass quality traitsผู้แต่ง: Dr.Autchara Kayan, Assistant Professor ,  Uddin, M.J., Kocamis, H., Tesfaye, D., Looft, C., Tholen, E., Schellander, K., Cinar, M.U., วารสาร:  
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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Analysis of the Phenotypic Diversity Within Cultivated Potato Varieties in Ethiopia at Three Locations) ผู้เขียน:Tesfaye Abebe, ดร.เฌอมาลย์ วงศ์ชาวจันท์, ผู้ช่วยศาสตราจารย์ , นายธัญญะ เตชะศีลพิทักษ์, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe phenotypic diversity of 25 potato varieties was analyzed at three distinct locations in the Amhara region of Ethiopia with the main objective of determining the diversity present among them based on 11 quantitative and 18 qualitative morphological characteristics. The fi eld experiment was laid out in a 5 ? 5 balanced lattice design with six replications. The results of analysis of variance indicated highly signifi cant (P < 0.01) differences among varieties for all 11 quantitative characteristics considered. Furthermore, analysis of the average taxonomic genetic distance based on 18 qualitative characteristics using the Euclidean distance function revealed considerable divergence among the studied varieties. Accordingly, the genetic distance value ranged from 0.24 between Tolcha and Wochecha, European commercial varieties, to 0.72 between the farmer’s variety Ater Abeba and the improved variety Zengena. The 25 varieties were grouped into three main clusters based on the distance matrix following the hierarchical agglomerative clustering method known as UPGMA (unweighted pair group method with arithmetic mean). Cluster I, which was the largest, contained 18 varieties followed by clusters II and III, with 3 and 4 varieties, respectively. Thus, this study revealed the presence of suffi cient phenotypic diversity among varieties in the country that can be exploited for germplasm enhancement. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Study on the Chemical Composition, Intake and Digestibility of Maize Stover, Tef Straw and Haricot Bean Haulms in Adami Tulu District, Ethiopia) ผู้เขียน:Tesfaye Alemu Aredo, N. K.R. Musimba2 สื่อสิ่งพิมพ์:pdf AbstractA study was conducted at two agricultural development sites in Adami Tulu district of Ethiopia to investigate the chemical composition, intake and digestibility of the three major crop residues, namely, maize stover, tef straw and haricot bean haulms produced in the area. Intake and digestibility were determined using nine Borana bulls. Chemical analysis indicated that the by-products have low nitrogen content and are composed of cell wall components with little soluble cell contents. As a result their intake and digestibility were low. Therefore, training of farmers in the application of some crop residue treatment methods and in the use of supplementary feeds is highly recommended. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Dry Matter Content, Starch Content and Starch Yield Variability and Stability of Potato Varieties in Amhara Region of Ethiopia) ผู้เขียน:Tesfaye Abebe, ดร.เฌอมาลย์ วงศ์ชาวจันท์, ผู้ช่วยศาสตราจารย์, นายธัญญะ เตชะศีลพิทักษ์, รองศาสตราจารย์, อรนุช ลีลาพร สื่อสิ่งพิมพ์:pdf AbstractEvaluation of dry matter content (DMC), starch content (SC) and starch yield (SY) of 25 potato varieties was carried out at three distinct locations in the Amhara region of Ethiopia during the 2011 cropping season. The main objectives were to examine the variability and stability of these traits and determine the proper production environments. The 25 varieties were examined in a complete 5 ? 5 lattice design with six replications. Statistical analyses of the DMC, SC and SY of these varieties revealed signifi cant (P < 0.01) genotypic and location variation and genotype ? environment interactions. Consequently, their DMC and SC ranged from 17.82 to 26.70 and 9.75 to 17.85%, respectively, while SY ranged from 2.21 to 6.91 t.ha-1. Correlation analysis revealed a strong linkage (P < 0.01) among these characters. Additive main effects and multiplicative interactions analysis for DMC and SC stability identifi ed Gorebella, Ater Abeba, Challa, Belete and CIP-396004.337 as relatively stable for processing while Menagesha, Bulle, Ararsa were suitable for table purposes. Furthermore, Debretabor followed by Adet were found suitable for producing processing types while Merawi was suitable for table types. Thus, this study distinctly separated varieties and environments on the one hand and the available genetic resources for a breeding program aimed at improving DMC and SY of potato in Ethiopia on the other. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Evaluation of Specifi c Gravity of Potato Varieties in Ethiopia as a Criterion for Determining Processing Quality) ผู้เขียน:Tesfaye Abebe, ดร.เฌอมาลย์ วงศ์ชาวจันท์, ผู้ช่วยศาสตราจารย์, นายธัญญะ เตชะศีลพิทักษ์, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractSpecifi c gravity (SG) is the measure of choice for estimating dry matter (DMC) and starch content (SC) and ultimately for determining the processing quality of potato varieties. Evaluation of the SG of 25 potato varieties was carried out at three distinct locations in the Amhara region of Ethiopia with the main objectives of determining their culinary quality and most suitable areas of production. The varieties were planted in a 5 ? 5 balanced lattice design of six replications during the 2011 rainy season. The results of the data analysis showed highly signifi cant (P < 0.01) genotypic and location differences and signifi cant (P < 0.05) genotype ? environment interactions. The pooled SG values ranged from 1.058 to 1.102. The SG of tubers of the improved variety Belete was the highest while that of Menagesha was the lowest. Furthermore, the SG values for varieties grown at Debretabor were higher than those for the corresponding varieties grown at Adet and Merawi. The DMC and SC were computed based on the SG and showed signifi cant (P < 0.01) genotypic variability. The highest DMC and SC were also obtained at Debretabor; thus, it is an ideal location to grow potatoes for high DMC and starch accumulation. Additive main effects and multiplicative interaction analysis identifi ed CIP- 392640.524, Zengena, Jalenie and Belete as stable genotypes with SG values above average. |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : The Potential of Urea Treated Maize Stover for Growth Performance of Weaned Crossbred Calves) ผู้เขียน:Tesfaye ALEMU, ดร.พรศรี ชัยรัตนายุทธ์, รองศาสตราจารย์ , ดร.ประวีร์ วิชชุลตา, รองศาสตราจารย์ , ดร.สายัณห์ ทัดศรี, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe effects of urea treatment on chemical composition, intake and digestibility of maize stover and the potential of such a stover for growth performance of weaned calves were investigated using 21 crossbred (50% Borana and 50% Friesian) calves of 9 to 12 months of age and an average initial live weight of 138.9 kg. The animals were divided into three groups each of which were individually fed to appetite on basal diets of either untreated maize stover (UNMS), or 5 % urea treated maize stover (UTMS), or natural pasture hay (NPH) for 99 days. In addition, all animals were given 1 kg concentrate mixture per head per day. Urea treatment increased the CP content of maize stover by 3.8 and 2.7 folds over the untreated stover and the natural pasture hay, respectively. Besides, compared with the untreated stover, urea treatment brought an improvement of 9% in in vitro dry matter digestibility and 22% in dry matter intake. These improvements in terms of chemical composition, intake and digestibility led to higher (p<0.05) live weight gain of animals fed on the urea treated stover diet compared with those fed on the untreated stover diet. However, there was no difference (p>0.05) in weight gain between the animals fed on the urea treated stover diet and those fed on the hay based diet. Generally, with the added advantage of being more cost effective than hay, feeding urea treated maize stover may be considered as one of the strategies that bring about an efficient utilization of crop residues for livestock feeding. However, its economic advantage over other alternatives must carefully be examined under the prevailing price conditions before it is implemented. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Variation in Chemical Composition and Pasting Properties of Starches of Different Potato Varieties Grown at Different Locations in Amhara Region, Ethiopia) ผู้เขียน:Tesfaye Abebe, ดร.เฌอมาลย์ วงศ์ชาวจันท์, ผู้ช่วยศาสตราจารย์, นายธัญญะ เตชะศีลพิทักษ์, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractPotato starches isolated from 25 different varieties grown at three different locations in the Amhara region of Ethiopia in 2011 were studied to determine their variation based on amylose content (AMC) and amylopectin content (APC), and pasting properties by iodine colorimetry and Rapid Visco Analyzer procedures, respectively. The results revealed highly significant (P < 0.01) differences between cultivar and location. The mean values for the AMC and APC ranged from 20.86% (Jalene) to 30.58% (Ater Abeba), and 69.42% (Ater Abeba) to 79.14% (Jalene), respectively. The mean AMC index of locations ranged from 24.50% to 26.24% for the Adet and Debretabor sites. The peak viscosity (PV), hot paste viscosity (HPV), breakdown viscosity (BDV), cool paste viscosity (CV) and setback viscosity (SBV) ranged from 225.10 to 426.72, 135.01 to 191.83, 56.47 to 259.32, 173.68 to 247.51 and 27.17 to 68.15 Rapid Visco units (RVU), respectively, while the pasting time (PT) and pasting temperature (Ptemp) ranged between 3.35 to 4.91 minutes and 68.16 to 70.89 ?C, respectively. Correlation among starch properties showed significant (P < 0.01 and P < 0.05) associations except for PV with CPV and HPV with BDV and SBV. The highest PV (538 RVU), HPV (207 RVU), BDV (363 RVU), and CV (265 RVU) values were recorded at the cool Debretabor site. Thus, the study revealed the significant genetic variation present among varieties with regard to the starch chemical composition and pasting properties and the effects of growing location on these properties. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Variation of Mineral Concentrations Among Different Potato Varieties Grown at Two Distinct Locations in Ethiopia) ผู้เขียน:Tesfaye Abebe, ดร.เฌอมาลย์ วงศ์ชาวจันท์, ผู้ช่วยศาสตราจารย์, นายธัญญะ เตชะศีลพิทักษ์, รองศาสตราจารย์, อรนุช ลีลาพร สื่อสิ่งพิมพ์:pdf AbstractThe extent of genetic variation in the protein and fi ber contents and the iron (Fe), zinc (Zn) and phosphorus (P) concentrations of 21 different potato varieties was studied at two distinct locations in Ethiopia. The experiments were conducted in a randomized complete block design in triplicate. Analysis of variance (ANOVA) of each set of experimental data revealed signifi cant (P < 0.01) genetic variation among varieties. The combined ANOVA also showed signifi cant (P < 0.01) variation due to location and genotype ? location interactions. Accordingly, the tuber protein and fi ber contents ranged from 3.77 to 7.36% and 1.18 to 2.07%, respectively. Likewise, the Fe, Zn and P concentrations ranged from 17.13 to 164.83, 7.07 to 20.21 and 143.68 to 357.76 mg.kg-1 dry weight, respectively. Consequently, men, women, and children can get 29, 13.3 and 65%, respectively, of their daily recommended nutrient intake (RNI) of Fe from eating 200 g fresh weight of tubers of the high Fe concentration variety Sisay and 12, 14.3 and 17%, respectively, of their daily RNI of Zn from 200 g of tuber of the high Zn variety Menagesha. Correlation analysis indicated a signifi cant (P < 0.01) association among these characters but not with protein and fi ber with Fe. Thus, this study found considerable variation in the mineral concentrations among potato varieties in Ethiopia which can be useful information to help curb mineral malnutrition. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Influence of Rates of Application of Different Plant Residues on Time Courses of N Mineralization and Immobilization in Soils with Different Textures) ผู้เขียน:Tesfaye Ertebo, ดร.อำนาจ สุวรรณฤทธิ์, ศาสตราจารย์เกียรติคุณ, นายวิสุทธิ์ วีรสาร, ผู้ช่วยศาสตราจารย์ , ดร.จงรักษ์ จันทร์เจริญสุข, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractAn aerobic incubation experiment was conducted at room temperature (19 to 23 ?C) to determine the influence of rates of application of different plant residues on time courses of N mineralization and immobilization in soils with different textures. The experiment was carried out in a completely randomized design with three replications. The experimental treatments were factorial combinations of four factors: (1) three rates of plant residue applications (0, 1.25, 2.50 and 5.00 mg of plant residue g-1 soil); (2) three soil textures (loamy sand, loam and clay soils); (3) four plant residue types (leucaena, sesbania, faba bean stubble and maize stubble); and (4) six incubation periods (0, 15, 30, 60, 90 and 120 days). The treated samples were analyzed for extractable mineral N (NH4 + + NO- 3) to determine mineralization and immobilization of N. From the results, the following conclusions and recommendations were drawn. (1) Application of sesbania residue into soils resulted in N mineralization with the rate that increased with fineness of soil texture but decreased with increasing time of incubation. In the cases of the loam and clay soils, N mineralization increased with increasing rate of residue up to 5.00 mg g-1 soil throughout the incubation period but, in the case of the loamy sand soil, N mineralization increased up to the highest rate after 30 days of incubation (DI). (2) Application of leucaena residue into soils resulted in N immobilization that increased with fineness of soil texture during 0-15 DI. N mineralization, increased with fineness of soil texture and rates of application up to 5.00 mg g-1 soil after 15-30 DI onwards, but decreased with time of incubation. (3) Application of faba bean stubble or maize stubble resulted in N immobilization at the rate that increased with fineness of soil texture. In the loamy sand soil N immobilization was mostly observed throughout 120 DI. In the loam and clay soils, N immobilization that increased with fineness of soil texture occurred during 0-15 DI. After 15-30 DI, N mineralization, at the rate that was independent of the rate of residue application in the case of the loam soil but decrease with increase in the application rate in the case of the clay soil, took place. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Urea Levels and Treatment Durations on Chemical Composition and In Vitro Dry Matter Digestibility of Maize Stover) ผู้เขียน:Tesfaye ALEMU, ดร.พรศรี ชัยรัตนายุทธ์, รองศาสตราจารย์, ดร.ประวีร์ วิชชุลตา, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractEffects of urea level and treatment duration on the chemical composition and in vitro dry matter digestibility (IVDMD) of maize stover was studied by treating the stover of improved maize variety with 4, 5 or 6% urea levels for 1, 2 or 3 weeks under laboratory condition of 25?C. There were significant differences in crude protein (CP), neutral detergent fiber (NDF) and IVDMD both among the urea levels and the treatment durations. The highest CP content of 16.9% was observed for the stover treated with 6% urea followed by 15.9% for the stover treated with 5% urea. With regard to treatment durations, there was no difference (p>0.05) in CP content between the 2 and 3 weeks treatment durations. Interaction between the two factors was significant (p<0.05) only for NDF and IVDMD. Treating the stover with 5% urea for a period of 2 weeks resulted in 76.6% NDF and 61.2% IVDMD both of which were not significantly different (p>0.05) from treating the stover with 6% urea for either 1, 2 or 3 weeks. Therefore the former combination of urea level and treatment duration was recommended to be optimum to treat maize stover. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Production and Utilization of Crop Residues in Three Agro Ecological Zones of Eastern Shoa Zone, Ethiopia) ผู้เขียน:Tesfaye ALEMU, ดร.พรศรี ชัยรัตนายุทธ์, รองศาสตราจารย์, ดร.ประวีร์ วิชชุลตา, รองศาสตราจารย์, ดร.สายัณห์ ทัดศรี, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractTo assess the production and utilization of crop residues in East Shoa Zone of Oromiya Regional State, Ethiopia, 3 Agro Ecological Zones (AEZs), namely, sub-moist (SM2), sub-humid (SH2) and semiarid (SA2) were chosen based on their large area coverage and, a total of 300 households were proportionally selected from these AEZs and interviewed using structured questionnaire. Even if the total annual crop residue produced per household was not statistically different, the contribution of each type of crop residue to the total annual crop residue production per household varied (p<0.05) among the AEZs. With regard to utilization, farmers in all the three AEZs used almost all types of their crop residues primarily for animal feeding. Alternative uses of crop residues were observed to vary more with the type of residue than with the AEZs. It could be concluded that with an annual average production of 0.67 to 1.01 tons per TLU of a household, crop residues contributed to 26 to 40% of the total annual maintenance feed requirement of ruminants. Through the use of improved seeds and other inputs that boosted both grain and residue yields, and by the application of better ways of collection and storage that minimized wastages, farmers could derive more benefits from these valuable feed resources. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Influence of Soil Moisture Content on Time Courses of Nitrogen Mineralization and Immobilization Caused by Applications of Different Plant Residue to Soils with Different Te ผู้เขียน:Tesfaye Ertebo, ดร.อำนาจ สุวรรณฤทธิ์, ศาสตราจารย์เกียรติคุณ, นายวิสุทธิ์ วีรสาร, ผู้ช่วยศาสตราจารย์, ดร.จงรักษ์ จันทร์เจริญสุข, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractA laboratory aerobic incubation experiment was conducted at room temperature to determine the influence of soil moisture contents on time courses of N mineralization and immobilization caused by application of different plant residues. The experiment was carried out in a completely randomized design with a 4 ? 3 ? 3 ? 6 treatments and three replications. The experimental treatments were factorial combinations of four factors: (1) four plant residue types (control, leucaena, sesbania, stubble of faba bean and stubble of maize; (2) three soil textures (loamy sand, loam and clay soil); (3) three moisture levels [50, 75 and 100 % field capacity (FC)]; and (4) six incubation periods (0, 15, 30, 60, 90 and 120 days). The treated samples were analyzed for mineral N (NH4 + + NO- 3) to determine mineralization and immobilization of N. Incorporation of sesbania residue in soils resulted in N mineralization with the rates decreasing with increase in time of incubation. Throughout 120 days of incubation (DI), N mineralization increased with the increase in soil moisture content up to 100 % FC in case of the loamy sand soil but up to 75 % FC in case of the clay soil. In case of the loam soil, N mineralization was not affected by soil moisture content during 30 DI but increased with increase in soil moisture content up to 100 % FC after 30 DI. Incorporation of leucaena residue in soils resulted in either no or slight change in mineral N in the soil during 30 DI regardless of kind of soil. The mineralization and immobilization if occurred either ended after 90 DI or continued to more than 120 DI depending on kind of soil. Incorporation of faba bean stubble or maize stubble in soils mostly resulted in immobilization of N in the soils during the early stages of incubation time and thereafter it either continued up to 120 DI or stopped depending on kind of soil. Both in case of immobilization and mineralization, they mostly increased with soil moisture content up to 100 % FC. For sesbania residue, most suitable soil moisture levels for maximizing N mineralization were 100 % FC in the loamy sand and loam soils and 75 % FC in the clay soil whereas those for leucaena residue were 75 % FC in the loamy sand and clay soils and 100 % FC in the loam soil. In case of incorporation with faba bean or maize stubble, N immobilization could be limited by limiting soil moisture content regardless of soil texture. However, after some specific times of incubation, increases in soil moisture content enhanced N mineralization in the loamy sand and loam soils. |
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