An agronomic and seed‐quality evaluation of noug (Guizotia abyssinica Cass.) germplasm in Ethiopia

Abstract

Noug {Guizotia abyssinica Cass.), a member ofthe Compositae family, is grown as an oilseed crop in Ethiopia. The crop grows best on poorly drained, heavy clay soils. This study investigates the genetic variability of agronomic and seed quality characteristics of 241 noug germplasm collections from different parts of Ethiopia evaluated in a field test at Ghinchi, near Addis Ababa, Ethiopia, in 1992, The maturity of the noug accessions ranged from 132 to 168 days. Seed oil contents ranged from 39.8 to 46.9% with linoleic acid being the major fatty acid ofthe oil (76.6% of total fatty acids). The results of this field study indicated that genetic differences for maturity existed among the noug accessions. Oil content variation was continuous, without clear separation of accessions into oil content groups. It is concluded that the genetic variation observed among these accessions could be utihzed in a breeding programme to develop high-yielding, well-adapted, high-oil-content noug cultivars for production in Ethiopia,

Genetic diversity of Guizotia abyssinica (L. f.) Cass. (Asteraceae) from Ethiopia as revealed by random amplified polymorphic DNA (RAPD)

“…Contrary to Gojam, the mean within population genetic diversity for Welo was found to be the highest and significantly higher than most of the means of other regions. Thus, this study provides further illustration of the reported agromorphological variation (Alemaw and Teklewold 1995;Genet and Belete 2000) and variation in oil content (Dutta et al 1994;Dagne 1994;Alemaw and Teklewold 1995) for Ethiopian niger. Genet and Belete (2000) estimated the diversity of Ethiopian niger using phenological and morphological characters and indicated that regionally the highest Shannon diversity index was recorded for Gojam.…”

“…The Press cake left after the oil has been extracted is found to be an excellent animal feed as it contains about 33% protein (Kandel and Porter 2002). The oil content of the niger seed vary considerably and the most abundant fatty acid is linoleic acid as reported by different authors (Dutta et al 1994;Alemaw and Teklewold 1995;Dagne and Jonsson 1997;Ramadan and Mörsel 2002).…”

“…Although there are few morphological studies on genetic diversity of niger (Nayakar 1976;Alemaw and Teklewold 1995;Pradhan et al 1995, Genet andBelete 2000) no molecular marker based genetic diversity study has been reported at least for Ethiopian niger. Random amplified polymorphic DNA (RAPD) technique is a method of choice for studying genetic diversity for crop species where there is little or no molecular genetics research (Nybom 2004), as it does not require sequence information for the target species.…”

Functional Properties, Nutritional Value, and Industrial Applications of Niger Oilseeds (Guizotia abyssinicaCass.)

“…It is a dicotyledonous herb, moderately to well branched, and grows up to 2 m in height (Getinet and Teklewold, 1995). The crop grows best on poorly drained, heavy clay soils (Alemaw and Wold, 1995;Francis and Campbell, 2003). Niger is cultivated in both temperate and tropical climates, being considered a temperate-region plant that has adapted to a semi-tropical environment.…”

Technology generation to dissemination: lessons learned from the tef improvement project

“…Means followed by same letter were not significantly different from each other (p \ 0.05, ANOVA). c RIL-181 (Tesfa) grown in the field at Debre Zeit in black Vertisols Campell 1997;Brandt 1997;Alemaw and Teklewold 1995). Unlike the introduced global crops, these indigenous crops have the major advantage that they fit well into the general socio-economic and ecological context of the region (Tadele 2009;Tadele and Assefa 2012).…”