Literature review and numerical taxonomy ofEragrostis tef (T’ef)

Costanza, Suzanne; deWet, J. M. J.; Harlan, Jack R.

doi:10.1007/bf02858337

Cited by 72 publications

(60 citation statements)

References 13 publications

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“…The current findings are more compatible with six major groupings of the 35 tef cultivars established by EBBA (1975) rather than the formation of only three clusters of 39 accessions of which two were that of its two putative related Eragrostis species ( COSTANZA et al 1979). Differences in the prolamin seed protein fraction alone revealed the classification of 37 tef cultivars or lines into seven groups of one to 14 (BEKELE et al 1995).…”

Section: Discussionsupporting

confidence: 81%

Trait Diversity, Heritability and Genetic Advance in Selected Germplasm Lines of Tef [Emgmstis tef(Zucc.) Trotter]

et al. 2000

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The genetic improvement of the Ethiopian cereal, tef, Erugrostis ref (Zucc.) Trotter, depends upon the variability in the indigenous germplasm. A bi‐replicated randomized complete block field experiment was, therefore, carried out at Debre Zeit and Alem Tena in Ethiopia during the 1996 main season to study the pheno‐morphic and agronomic trait diversity in 320 tef germplasm lines. All of the 17 traits assessed showed substantial (p ≤0.001) variation among the lines. Genotypes and locations interacted significantly (p ≤0.05) on 11 of the traits. At about 50% similarity level, the tef lines grouped into six major clusters of nine to 243 lines. Five principal components (PCs) extracted about 71% of the entire variation of the lines. About 28% of the total variance explained by the first PC was due chiefly to variation in main shoot culm length, diameters of the two basal culm internodes, panicle length and grain yield/panicle. About 16% of the whole variance explained by the second PC originated mainly from variation in the length of the first and second basal culm internodes, grain yield/plant, and peduncle length. The third PC accounting for about 12% of the entire variance resulted largely from variation in harvest index and shoot phytomass yield/plant. Across traits, the phenotypic and genotypic coefficients of variation varied in that order from about 2% for grain yield/panicle to 58% for number of fertile tillers/plant, and from less than 1% for diameters of the two basal culm internodes and grain yield/panicle to 35% for panicle length. Estimates of broad sense heritability and genetic advance (as ratio of the mean) were highest for panicle length (71%) and number of fertile tillers/plant (21%), respectively. But both of these were lowest for the second basal culm internode diameter (1%). Overall, the study confirmed that tef is a highly versatile crop with broad trait diversity in the germplasm, and this offers ample opportunities for improvement through breeding.

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Section: Discussionsupporting

confidence: 81%

Trait Diversity, Heritability and Genetic Advance in Selected Germplasm Lines of Tef [Emgmstis tef(Zucc.) Trotter]

et al. 2000

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“…About 350 species are known in the genus Eragrostis (Demissie 2000), of which teff is the only cultivated species. Chloridoideae is used synonymously for Eragrostoidae of teff (Costanza et al 1980). Teff cultivars have been recognized and described based on the colour of the grains and inflorescences, ramification of the inflorescences and the size of plants.…”

Section: Introductionmentioning

confidence: 99%

Teff (Eragrostis tef) as a raw material for malting, brewing and manufacturing of gluten-free foods and beverages: a review

2012

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The demand for gluten-free foods is certainly increasing. Interest in teff has increased noticeably due to its very attractive nutritional profile and gluten-free nature of the grain, making it a suitable substitute for wheat and other cereals in their food applications as well as foods for people with celiac disease. The main objective of this article is to review researches on teff, evaluate its suitability for different food applications, and give direction for further research on its applications for health food market. Teff is a tropical low risk cereal that grows in a wider ecology and can tolerate harsh environmental conditions where most other cereals are less viable. It has an excellent balance of amino acid composition (including all 8 essential amino acids for humans) making it an excellent material for malting and brewing. Because of its small size, teff is made into whole-grain flour (bran and germ included), resulting in a very high fiber content and high nutrient content in general. Teff is useful to improve the haemoglobin level in human body and helps to prevent malaria, incidence of anaemia and diabetes. The nutrient composition of teff grain indicates that it has a good potential to be used in foods and beverages worldwide. The high levels of simple sugars and α-amino acids as a result of breakdown of starch and protein, respectively, are essential for fermentation and beer making.

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“…Some attempts have been made to measure genetic diversity in tef based on morphological traits and protein markers (EBBA 1975;COSTANZA et al 1979;TEFERA et a]. 1990;TADESSE 1993).…”

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Genetic Characterization of two Eragrostis Species using AFLP and Morphological Traits

et al. 2004

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Ayele, M., Tefera, H., Assefa, K. and Nguyen, H. T. 1999. Genetic characterization of two Eragrostis species using AFLP and morphological traits.-HHereditu.r 130: 33-40. Lund, Sweden. lSSN 0018-0661. Received August 31, 1998. Accepted January 11, 1999 Tef [Eragrosris tef (Zucc.) Trotter] is the most important cereal crop in Ethiopia. An experiment was conducted to investigate genetic diversity among four cultivars of tef and 14 accessions of Eragrostis pifosa using radiobabelled and silver stained amplified fragment length polymorphism. Morphological traits were also evaluated. A total of 897 markers were obtained out of which 395 were polymorphic using 1 1 primer combinations. Cluster analysis revealed accessions of E. pilosa which are distantly related and others closely related to tef. Our previous experience also indicates that E. pilosa is crossable with tef. Those accessions distantly related to tef could be used in a crossing program to generate a population for selection and/or genetic mapping. Such genetic mapping populations will form an important entry point towards the molecular genetic dissection of the plant genus, Erqrostis, especially in the context of comparative mapping. Knowledge gained from such study, apart from tef improvement, will also be useful for many forage and turf grass species where little molecular genetic information is available. Nine cultivars or accessions had one or more unique fragments using one or more AFLP primers indicating the potential of the technology in fingerprinting tef in a breeding or seed multiplication program. The results also showed that clusters obtained using silver staining and y"P-ATP labeling were similar, suggesting that silver staining could be used as an alternative to radiolabeling at least in genetic diversity analysis. Significant genetic variation was obtained for morphological traits. Of particular interest to tef breeding was short plant stature in E. pi1o.w which could be transferred to tef to minimize the problem of lodging. Diversity revealed at the morphological trait level was not commensurate with that observed for AFLP. This was due to the small number of available morphological traits and their interaction with the environment. Henrj,

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Literature review and numerical taxonomy ofEragrostis tef (T’ef)

Cited by 72 publications

References 13 publications

Trait Diversity, Heritability and Genetic Advance in Selected Germplasm Lines of Tef [Emgmstis tef(Zucc.) Trotter]

Trait Diversity, Heritability and Genetic Advance in Selected Germplasm Lines of Tef [Emgmstis tef(Zucc.) Trotter]

Teff (Eragrostis tef) as a raw material for malting, brewing and manufacturing of gluten-free foods and beverages: a review

Genetic Characterization of two Eragrostis Species using AFLP and Morphological Traits

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