Degife et al Greener Journal of Agricultural Sciences Vol. 9(4), pp. 382-395, 2019 ISSN: 2276-7770 Copyright ©2019, the copyright of this article is retained by the author(s) DOI Link: https://doi.org/10.15580/GJAS.2019.4.090219165 https://gjournals.org/GJAS Genetic Variability Analysis of Agro-Morphological Traits among Bread Wheat (Triticum aestivum L.) Genotypes at Raya Valley of Southern Tigray, Ethiopia 1Girma Degife*; 2Wassu Mohammed; 3Kebebew Assefa 1 Ethiopian Institute of Agricultural Research, Mehoni Agricultural Research Centre, P.O. Box 47, Mehoni, Ethiopia 2Haramaya University, P.O. Box 138, Haramaya, Ethiopia 3 Ethiopian Institute of Agricultural Research, Debre-Zeit Agricultural Research Centre, Debre-Zeit, Ethiopia ARTICLE INFO ABSTRACT Article No.: 090219165 Type: Research DOI: 10.15580/GJAS.2019.4.090219165 Assessment of genetic variability in crop species is one of the major activities of plant breeding which helps to design breeding methods and/or selection of genotypes for further evaluation to meet the diversified goals. Therefore, this field experiment was conducted to assess the genetic variability in bread wheat genotypes. The field evaluation of 32 genotypes and 4 released varieties was conducted in 6 x 6 Triple Lattice Design at Mehoni Agricultural Research Station in 2017 cropping season. Results of analysis of variance revealed the presence of significant differences among genotypes for 12 quantitative traits. The variation observed among genotypes for grain yield ranged from 2.80 to 5.33 t ha-1. The four genotypes (QAFZAH-2/FERRIUG-2, KAUZ’S’/FLORKWA1//GOUMRIA-3, ETBW5957and SERI 82/SHUHA’S’//PASTOR-2 had yield advantage of 7.58 to 12.21% over the high yielding check variety, GAMBO (4.75 t ha-1). Phenotypic (PCV) and genotypic (GCV) coefficient of variations ranged from 5.67 (plant height) to 14.74 (fertile tiller per plot) and 7.06 (days to maturity) to 19.08% (fertile tiller per plot), respectively. Heritability (H2) in broad sense and genetic advance as percent of mean (GAM) ranged between 41.46 (biomass yield) and 89.08 (days to heading) and 8.56 (plant height) and 24.09% (harvest index), respectively. High H2 estimates coupled with moderate or high GAM for plant height, days to heading, days to maturity, spike length, grain yield, spikelets per spike and harvest index suggested the higher chance of improving these traits through selection of genotypes for high mean performance. Submitted: 02/09/2019 Accepted: 22/09/2019 Published: 01/11/2019 *Corresponding Author Girma Degife E-mail: girmadegife12@ gmail.com Keywords: Heritability; Genotypic Coefficient of Variations; Genetic Advance Return to Content View [Full Article – PDF] [Full Article – HTML] [Full Article – EPUB] Post-Publication Peer-review Rundown View/get involved, click [Peer-review] REFERENCES . Adhiena Mesele, Wassu Mohammed and Tadesse Dessalegn. 2016. Estimation of Heritability and Genetic Advance of Yield and Yield Related Traits in Bread Wheat (Triticum aestivum L.) Genotypes at Ofla District, Northern Ethiopia. International Journal of Alemu Dabi Borena. 2016. Genetic Variability and Association among Grain Yield and Yield Related Traits of Bread Wheat (Triticum aestivum L.) Genotypes. MSc Thesis Postgraduate Program Directorate, Haramaya University, Ethiopia. Ali, Y., Manzoor A. B., Akhter J., Monneveux P. And Lateef Z. 2008. 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