Diversity of Sorghum (Sorghum bieolor (L.) Moench) in North Shewa and South Welo Region of Ethiopia: Focus on Farmers' Varieties with _ Emphasis on Frequency of Occurrence and Use Values in Relation to Morphological and Biochemical Characters
| dc.contributor.advisor | Bekele, Endashaw | |
| dc.contributor.author | Abdi, Adugna | |
| dc.date.accessioned | 2022-01-24T07:15:49Z | |
| dc.date.accessioned | 2023-11-08T16:34:07Z | |
| dc.date.available | 2022-01-24T07:15:49Z | |
| dc.date.available | 2023-11-08T16:34:07Z | |
| dc.date.issued | 2000 | |
| dc.description.abstract | Thirty four sorghum (S.bieolor (l).Moench) landraces consisting of 1020 indi vidual plants (30 plants of each land race) collected from five agroecosites in North Shewa and South Wela regions of Ethiopia (Bati 8, Fontenina 5, Hayike 2. Layignaw alaye 17, and Merewa Adere 2) were lIsed in this study. The materials were classified on the basis of administrational zones (4 cl ass ifying variables; Woredas, ecosite of origin and altitudes, Morphological variation for the fourteen quali tative characters that showed two or more phenotypic classes were estimated using the Shanon•Weaver diversity index (H'). Phenotypic variation was found between and within each classifying variable. The value of H' for ailiandraces varied from 0.32 to 0.98 with an overall mean of 0.77 ± 0.04. One way analysis of variance (ANOVA) showed significant differences between characters within all classifying variab les and this contributed to the largest portion of the total variance. Cluster analysis based on ordinal variables grouped the landraces in 5 clusters. A higher proportion of landraces sharing similar altitude groups and similar agroecological sites were grouped together. Panicle compactness and shape as well as stalk juiciness were the predominant characters in grouping the land races into th ei r respective cl uster. Panicle compactness and shape also contributed relatively more to altitudinal and ecological di ffe rentiation. This differential distribution of different panic le types with respect to compactness and shape revealed the adap tive significance o f panicle compactness and shape that re nected the patterns of di stribution of different races in north Shewa and south Welo regions. X2 test was carried out to detect the deviation of the observed rrequencyof all the characters from the expected ones. Significant dirferences were not observed for most or the characters between the observed and expected rrequenc ies. Isozyme analysis was perfomled usmg two-enzyme systems esterase (EST) and acid phosphatase (ACP) to see the allelic variation among the 34 sorghum landraces. However, phenotypic polymorphism was not observed for any of the enzymes used in the analysis. For the analysis of frequency of existence (diversity) of sorghum landraces under the environmental variability (altitudes and field size), transect method over 100 plots (fields) was used. As altitude levels increased or decreased beyond the range of 1500- 1650 m.a.s.l, the diversity of tile sorghum land races also decreased. A relatively lower field size located nearer to the home range was found to contain higher diversity. The use values of the 34 sorghum landraces were also analyzed by interviewing 30 informants in nonh Shewa and south Welo regions. Thirty informants were contacted and the uses of the identified sorghum landraces were recorded on 30 pl ots. Of atl the landraces zen gada and ahiyo comprised the maximum number of uses (15 and 13, respectively). However, almost alt-30 landraces were known to have been selec ted for their nutritional value as injera making and for their sui tability for beverage. Ethnobotanical survey was conducted and the important data on fann er perceptions about the agromorphologica! traits distinguishing land races. cultural val ucs and prefcrred traits of sorghum landraces were coll ected. The knowledge of farmers, which is documented in this study. is an important input to the build ing up of the scient ific basis of ill-sil/l conservation of agrobiodiversi ty in sorghum crops. The information retained from the famlers' knowledge can also be applied in future breeding activities and designingin-situ conservation program. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/123456789/29564 | |
| dc.language.iso | en | en_US |
| dc.title | Diversity of Sorghum (Sorghum bieolor (L.) Moench) in North Shewa and South Welo Region of Ethiopia: Focus on Farmers' Varieties with _ Emphasis on Frequency of Occurrence and Use Values in Relation to Morphological and Biochemical Characters | en_US |
| dc.type | Thesis | en_US |