Phenotypic diversity in Ethiopian durum wheat (Triticum turgidum var. durum) landraces
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 usin...
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KeAi Communications Co., Ltd.
2015-06-01
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| Series: | Crop Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221451411500046X |
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| author | Dejene K. Mengistu Afeworki Y. Kiros Mario E. Pè |
| author_facet | Dejene K. Mengistu Afeworki Y. Kiros Mario E. Pè |
| author_sort | Dejene K. Mengistu |
| collection | DOAJ |
| description | 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 1600–2000 and > 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. |
| first_indexed | 2024-12-14T16:34:34Z |
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| institution | Directory Open Access Journal |
| issn | 2095-5421 2214-5141 |
| language | English |
| last_indexed | 2024-12-14T16:34:34Z |
| publishDate | 2015-06-01 |
| publisher | KeAi Communications Co., Ltd. |
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| series | Crop Journal |
| spelling | doaj.art-60786ca2dffe4e619349d3948109e33e2022-12-21T22:54:30ZengKeAi Communications Co., Ltd.Crop Journal2095-54212214-51412015-06-0133190199doi:10.1016/j.cj.2015.04.003Phenotypic diversity in Ethiopian durum wheat (Triticum turgidum var. durum) landracesDejene K. Mengistu 0Afeworki Y. Kiros 1Mario E. Pè 2Department of Dryland Crop and Horticultural Sciences, Mekelle University, P.O.Box 231 Mekelle, EthiopiaDepartment of Dryland Crop and Horticultural Sciences, Mekelle University, P.O.Box 231 Mekelle, EthiopiaScuola Superiore Sant'Anna (SSSUP), Pizza Martiri Liberà, 33 – 56127, Pisa, ItalyThe 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 1600–2000 and > 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.http://www.sciencedirect.com/science/article/pii/S221451411500046XPhenotypic diversityDiversity indexLandracesDistricts of originAltitudeEthiopia |
| spellingShingle | Dejene K. Mengistu Afeworki Y. Kiros Mario E. Pè Phenotypic diversity in Ethiopian durum wheat (Triticum turgidum var. durum) landraces Crop Journal Phenotypic diversity Diversity index Landraces Districts of origin Altitude Ethiopia |
| title | Phenotypic diversity in Ethiopian durum wheat (Triticum turgidum var. durum) landraces |
| title_full | Phenotypic diversity in Ethiopian durum wheat (Triticum turgidum var. durum) landraces |
| title_fullStr | Phenotypic diversity in Ethiopian durum wheat (Triticum turgidum var. durum) landraces |
| title_full_unstemmed | Phenotypic diversity in Ethiopian durum wheat (Triticum turgidum var. durum) landraces |
| title_short | Phenotypic diversity in Ethiopian durum wheat (Triticum turgidum var. durum) landraces |
| title_sort | phenotypic diversity in ethiopian durum wheat triticum turgidum var durum landraces |
| topic | Phenotypic diversity Diversity index Landraces Districts of origin Altitude Ethiopia |
| url | http://www.sciencedirect.com/science/article/pii/S221451411500046X |
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