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| 1 | Phenotypic diversity in Ethiopian durum wheat(Triticum turgidum var.durum)landraces显示文摘The phenotypic diversity of 274 Ethiopian durum wheat accessions was analyzed, taking their geographic origins into account. The aim was to assess the extent and patterns of agronomically important phenotypic variation across districts of origin and altitude classes for major qualitative traits using diversity index and multivariate methods. Eight qualitative and three quantitative traits were scored for 2740 plants and analyzed for diversity. The Shannon–Weaver diversity(H′) index was used to estimate phenotypic diversity. The estimated H′ ranged from monomorphic for glume hairiness to highly polymorphic for other traits. The highest(0.86) H′ was obtained for seed degree of shriveling, possibly indicating the differential responses of the genotypes to water deficit during later growth stages. With respect to district of origin, the highest(0.72) and lowest(0.44) H′ values were obtained for the Bale and SNNP districts, respectively. With respect to altitude, the highest(0.76) and lowest(0.62) H′ values were recorded for altitudes 1600–2000and > 3000 m above sea levels, respectively. Principal components analysis explained substantial variation contributed by district of origin and altitude range. Genotypes were clustered into three groups by districts of origin and altitude class, with relatively strong bootstrap values of 57 and 62 for the former and latter, respectively. It could be concluded that Ethiopian durum wheat landraces are very diverse both within and among districts of origin and altitude classes. This wealth of genetic diversity should be exploited for wheat improvement of yield and for resistance to biotic and abiotic stresses, particularly terminal drought. | Dejene K.Mengistu Afeworki Y.Kiros Mario E.Pè | 2015 | The Crop Journal2015，3，3： | 3 |
| 2 | Direct Characterization of Kerogen by X-ray and Solid-State 13C Nuclear Magnetic Resonance Methods 显示文摘 | Kelemen S R Afeworki M | 2007 | Energy& Fuels2007，，21： | 1 |
| 3 | Characterization of organically bound oxygen forms in lignites, peats, and pyrolyzed peats by X-ray photoelectron spectroscopy (XPS) and solid-state C-13 NMR methods 显示文摘 | KELEMEN S R AFEWORKI M GORBATY M L | 2002 | Energ Fuel2002，16，6： | 1 |
| 4 | 查看详情显示文摘 | Mehnert C. P Cook R. A Dispenziere N. C Afeworki M | | 0，，： | 1 |
| 5 | XPS and 15N NMR study of nitrogen forms in carbonaceous solids 显示文摘 | KELEMEN S R AFEWORKI M GORBATY M L KWIATEK P J | 2002 | Energy Fuels2002，16，6： | 1 |
| 6 | Characterization of organically bound oxygen forms in lignites, peats, and pyrolyzed peats by X-ray photoelectron spectroscopy (XPS) and solid-state3C NMR methods显示文摘 | Keleman S R Afeworki M Gorbaty M L | 2002 | Energy & Fuels2002，16，： | 1 |
| 7 | Characterization of organically bound oxygen forms in lignites, peats, and pyrolyzed peats by X-ray photoelectron spectroscopy(XPS)and solid-state 13C NMRmethods显示文摘 | Kelemen S R Afeworki M Gorbaty M L | 2002 | Energy&Fuels2002，16，6： | 1 |
| 8 | Characterization of organically bound oxygen forms inignites, peats, and pyrolyzed peats by X-rayphotoelectron spectroscopy (XPS) and solid-state 13CNMR methods 显示文摘 | Kelemen S Afeworki M Gorbaty M L | 2002 | Energy & Fuels2002，16，6： | 1 |
| 9 | Characterization of organically bound oxygen forms in lignites, and pyrolyzed peats by X-ray photoelectron spectroscopy(XPS) and solid-state C NMR methods显示文摘 | KELEMEN S R AFEWORKI M GORBATY M L COHEN A D | 2002 | Energy Fuels2002，16，6： | 1 |
| 10 | Characterization of organically bound oxygen forms in lignites, peats, and pyrolyzed peats by X-ray photoelectron spectroseopy (XPS) and solid-state 13C N MR methods显示文摘 | KELEMEN S R AFEWORKI M GORBATY M L | 2002 | Energy Fuels2002，16，6： | 1 |
| 11 | 1 H MAS NMR (magic-angle spinning nuclear magnetic resonance) techniques for the quantitative determination of hydrogen types in solid catalysts and supports 显示文摘 | Kennedy GJ Afeworki M Calabro DC | 2004 | Appl Spectrosc2004，58，6： | 1 |
| 12 | XPS and 15N NMR study of nitrogen forms in carbonaceous solids显示文摘 | KELEMEN S R AFEWORKI M GORBATY M L KWIATEK P J SOLUM M S HU J Z PUGMIRE R J | 2002 | Energy Fuels2002，16，6： | 1 |
| 13 | Muhifunctional antioxidant activity of HBED iron chelator 显示文摘 | SAMUNI AM AFEWORKI M STEIN W | 2001 | Free Radic Biol Med2001，30，2： | 1 |
| 14 | XPS and 15N NMR study of nitrogen forms in carbonaceous solids 显示文摘 | Kelemen S R Afeworki M Gorbaty M L | 2002 | Energy Fuels2002，16，6： | 1 |
| 15 | Direct characterization of kerogen by X-ray and solid-state 13 C nuclear magnetic resonance methods显示文摘 | Kelemen S R Afeworki M Gorbaty M L | 2007 | Energy&Fuels2007，21，： | 1 |
| 16 | Characterization of organically bound oxygen forms in lignites, peats and pyrolyzed peats by X-ray photoelectron spectroscopy (XPS) and solid-state 13C NMR methods 显示文摘 | Kelemen S R Afeworki M Gorbaty M L Cohen A D | 2002 | Energy & Fuels2002，16，： | 1 |
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