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Academic Research Journal of
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Academic Research Journal of Agricultural Science and Research Vol. 6(3), pp. 163-171. April, 2018. ISSN: 2360-7874 DOI: 10.14662/ARJASRD2018.024 Full Length Research Genetic Variability, Broad Sense Heritability and Trait Associations among Grain Yield and Yield Related Traits in Tef [Eragrostistef (Zucc.) Trotter] Genotypes
Nigus Belay
Ethiopian Institute of Agricultural Research, Holetta Research Center, P. O. Box 31, Holetta, Ethiopia *Corresponding author email: nigusb2006@gmail.com
Accepted 15 April 2018
Tef [Eragrostistef (Zucc.) Trotter], is an important staple cereal crop and extensively cultivated by small scale farmers in Ethiopia. Understanding of the nature and magnitude of genetic variability and heritability and the degree of correlation among traits is important for the genetic improvement of crops through breeding. Therefore, the present study was carried out to assess the magnitude of genetic variability and broad sense heritability and trait associations among grain yield and yield related traits of tef genotypes. Twenty-two tef genotypes were evaluated in a randomized complete block design with three replications at two locations in central highland of Ethiopia. Analysis of variance revealed significant genotypic difference and genotype x environment interaction for most of evaluated traits. The genotypic coefficient of variation ranged from 1.52% for lodging index to 10.15% for panicle length while the phenotypic coefficient of variation ranged from 2.71% for lodging index to 11.21% for grain yield. Panicle length and plant height exhibited highest broad sense heritability value of 94.57% and 90.22%, respectively. Genetic advance in percent of mean were ranged from 1.76 (lodging index) to 20.33%, (panicle length). High heritability combined with high genetic advance was observed for Panicle length indicates the dominance of additive gene action in governing the trait. Grain yield had a positive and significant phenotypic and genotypic correlation with grain filling period, shoot biomass and harvest index. Hence, improvement in grain yield could be achieved by selecting genotypes having longer grain filling period, higher shoot biomass and harvest index.
Key words: Tef, Genetic variability, Genetic advance, Broad sense heritability, trait association
How to cite this article: Belay N (2018). Genetic Variability, Broad Sense Heritability and Trait Associations among Grain Yield and Yield Related Traits in Tef [Eragrostistef (Zucc.) Trotter] Genotypes. Acad. Res. J. Agri. Sci. Res. 6(3): 163-171
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