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J. Biosci. Agric. Res. | Volume 27, Issue 01, 2234-2251 | https://doi.org/10.18801/jbar.270121.273
​Article type: Research article | Received: 10.04.2019; Revised: 20.04.2021; First published online: 30 April, 2021

​Genetic gain in grain yield and oil content of Noug (Guizotia abyssinica) in Ethiopia

Abebe Hinkossa Wirtu
Department of Plant Sciences, Faculty of Agriculture, Wollega University Shambu Campus Shambu, Ethiopia.

✉  Corresponding author: [email protected] (Wirtu, AH), Contact No. +251-910046991.

Abstract
The primary and extended objective of plant breeding is to advance productivity to match the lengthening food requirements of people. Estimation of genetic advance from a breeding program and periodic evaluation of improvement in the genetic gain of a crop through released varieties is therefore needed to perceive changes and success generated by breeding activities. Periodic valuation of genetic progress of crop varieties is required to perceive the effectiveness of past breeding activities in genetic yield potential and prompt future selection criteria to aid further improvement. A total of 5 varieties have been released in Ethiopia, from 1988 to 2010. However, the level of genetic progress was not quantified. This study aimed to assess the genetic gain in seed yield potential and oil content of Noug (Guizotia abyssinica) and estimate changes made to yield related traits by genetic improvement of the crop. The experiment was conducted using 5 noug improved varieties and one local variety arranged in RCBD with four replications in 2016/17 main cropping season under rainfed condition. Results indicated that seed yield increased significantly during these 22 years. The estimated annual yield gain was 10.36 kg ha-1 year–1(1.58% per year), reflecting the important efforts of the past breeding programs. Number of head per plant, number of seed per head, Seed yield per plant, biomass yield, harvest and oil content were also increased significantly by 1.72%, 1.71%, 1.85%, 0.33%, 1.03% and 0.34% per year, respectively. The endeavor should be encouraged and extended to accomplish more advances in these and other relevant traits. Noug breeding has not ascertained plateau in Ethiopia. Thus, development of higher yielding varieties of noug should persist to lengthen Noug grain yields if past tendency intends the prospective. To see the impact of the accomplishment in the genetic advance of noug research, it is compulsory to covenant huge scale popularization of the released varieties.
 
Key Words: Noug (Guizotia abyssinica), Genetic gain, yield potential, oil content and grain yield

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MLA
Wirtu, A. H. “Genetic gain in grain yield and oil content of Noug (Guizotia abyssinica) in Ethiopia”. Journal of Bioscience and Agriculture Research, 27(01), (2021): 2234-2251.
 
APA
Wirtu, A. H. (2021). Genetic gain in grain yield and oil content of Noug (Guizotia abyssinica) in Ethiopia Journal of Bioscience and Agriculture Research, 27(02), 2234-2251.
 
Chicago
Wirtu, A. H. “Genetic gain in grain yield and oil content of Noug (Guizotia abyssinica) in Ethiopia”. Journal of Bioscience and Agriculture Research, 27(01), (2021): 2234-2251.
 
Harvard
Wirtu, A. H. 2021. Genetic gain in grain yield and oil content of Noug (Guizotia abyssinica) in Ethiopia. Journal of Bioscience and Agriculture Research, 27(01), pp. 2234-2251.
 
Vancouver
Wirtu, AH. Genetic gain in grain yield and oil content of Noug (Guizotia abyssinica) in Ethiopia. Journal of Bioscience and Agriculture Research, 2021 April 27(01): 2234-2251.

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