Abstract
A total of 4,840 entries of tetraploid wheat germplasm collections representing 121 accessions from Ethiopia were evaluated for phenologic and qualitative trait diversity. The objectives were to assess the diversity patterns of the germplasm with respect to regions, species and altitudinal class. High values of Shannon–Weaver Diversity Index (H′) were recorded for most traits in each region, altitudinal classes, and species. Monomorphism was also high at accession levels. Both H′ and Nei’s gene diversity value for the entire data set (total gene diversity H T = 0.572; the within accessions gene diversity H S = 0.112; and gene diversity among accessions D ST = 0.460) showed the variation for the trait is mainly among accessions/populations rather than within accessions/population. The least mean H′ value over all the traits used for the study was obtained from released varieties (among the origin groups) and Triticum dicoccon (among species). Triticum durum exhibit the highest H′ for a number of traits. Accessions collected from altitudinal class III (2401–2800 m a.s.l.) and class II (2001–2400 m a.s.l.) showed the highest H′ values for a valuable number of traits. Thus classifications using various phenology and qualitative traits enable to identify adaptation of a genotype and would improve the evaluation of genotype for potential adaptation.
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Acknowledgments
We are grateful for the Institute of Biodiversity Conservation and Debre Zeit Agricultural Research Centre of Ethiopia for providing us the plant material for this study. The senior author would thank Dr Kebebew Assefa and Ms Meseret Kebede for their technical assistance in data analysis as well as for reviewing the original manuscript and forwarding valuable comments and suggestions.
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Hailu, F., Johansson, E. & Merker, A. Patterns of phenotypic diversity for phenologic and qualitative traits in Ethiopian tetraploid wheat germplasm. Genet Resour Crop Evol 57, 781–790 (2010). https://doi.org/10.1007/s10722-009-9518-z
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DOI: https://doi.org/10.1007/s10722-009-9518-z