Genotype, Environment, and GXE Interaction Effect on Some Selected Traits of Taro (Colocasia esculenta (L.) Schott)
Tewodros Mulualem,
Getachew Etana Gemechu,
Neim Semman
Issue:
Volume 11, Issue 1, March 2023
Pages:
1-11
Received:
11 May 2022
Accepted:
30 January 2023
Published:
21 March 2023
Abstract: The experiment was conducted to evaluate the nature and the extent of the genotype and environment interactions, to select stable and high yielding taro genotypes for fresh storage corm yield, and related traits to identify the most representative and discriminating environment in southwest Ethiopian regions. The study was tested across four environments (Jimma, Agaro, Gera, and Metu) for two cropping seasons in southwest Ethiopia. Nine selected and promising genotypes and one standard check (Denu) were evaluated by using RCBD that replicated three times. The important data were collected from all tested location and analyzed using different statistical software’s. The analyzed result showed significant differences (p<0.01) for genotype, environment, and genotype by environment interactions (GEI) effects for all the traits evaluated exceptions to the root length. It also revealed that the extent of the mean square of the environment was more than those of the genotype and GEI for all traits targeted and indicated the uniqueness of the test environment. The genotypes 053 and 133 were identified as an ideal genotypes being high yield and wider adaptability hence nominated for release and then for production. The GGE bi-plot also identified Agaro-2 and Gera-2 were the most ideal environment for the evaluated of taro genotypes for their important useable traits. Four mega-environments (MGE) were identified for taro breeding; where environments Agaro-22, Gera-2, and Gera-1 combined into MGE-1, environments Metu-1, and Jimma-1 fell into a separate MGE-2, and environments Jimma-2 and Agaro-1 pooled into MGE-3, and Metu-2 separated into MGE-4, respectively.
Abstract: The experiment was conducted to evaluate the nature and the extent of the genotype and environment interactions, to select stable and high yielding taro genotypes for fresh storage corm yield, and related traits to identify the most representative and discriminating environment in southwest Ethiopian regions. The study was tested across four enviro...
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Associations Studies Among Yield, Yield Components and Quality Traits in Advanced Bread Wheat (Triticum aestivum l.) Genotypes at Sinana, South Eastern Ethiopia
Hiwot Sebsibe,
Bulti Tesso,
Tesfaye Letta
Issue:
Volume 11, Issue 1, March 2023
Pages:
12-20
Received:
14 November 2022
Accepted:
3 July 2023
Published:
17 July 2023
Abstract: Information on the extent of genetic variation and associations among characters is important to design optimum breeding strategies and to develop varieties for the targeted area of production. Therefore, this research was conducted at Sinana Agriculture Research Centre on testing site, south eastern Ethiopia, with the objectives of to assess associations among yield, yield components and quality traits, and to determine the extent of direct and indirect effects of yield related traits on yield. The experiment was conducted in 2020/21 cropping season using 21 promising lines and 4 released varieties in lattice Design with three replications. Data were recorded for 9 agronomic and 13 grain quality characters. Analysis of variance revealed the presence of highly significant (P ≤ 0.01) variation among genotypes. Grain yield had high genotypic correlation with day to heading, spike length and spikelet per spike in the process of selection much attention should be given to them as these characters are helpful. Day to heading and spikelets per spike had strong and positive direct effect on grain yield, but, spike length had negative direct effect.
Abstract: Information on the extent of genetic variation and associations among characters is important to design optimum breeding strategies and to develop varieties for the targeted area of production. Therefore, this research was conducted at Sinana Agriculture Research Centre on testing site, south eastern Ethiopia, with the objectives of to assess assoc...
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