Version 1
: Received: 1 October 2023 / Approved: 4 October 2023 / Online: 4 October 2023 (05:04:02 CEST)
How to cite:
Nyasulu, M.; Chimzinga, S.Z.; Maliro, M.; Kamanga, R.M.; Medison, R.G.; Sefasi, A. Stability Analysis and Identification of High-Yielding Amaranth Accessions for Varietal Development Under Various Agroecologies of Malawi. Preprints2023, 2023100202. https://doi.org/10.20944/preprints202310.0202.v1
Nyasulu, M.; Chimzinga, S.Z.; Maliro, M.; Kamanga, R.M.; Medison, R.G.; Sefasi, A. Stability Analysis and Identification of High-Yielding Amaranth Accessions for Varietal Development Under Various Agroecologies of Malawi. Preprints 2023, 2023100202. https://doi.org/10.20944/preprints202310.0202.v1
Nyasulu, M.; Chimzinga, S.Z.; Maliro, M.; Kamanga, R.M.; Medison, R.G.; Sefasi, A. Stability Analysis and Identification of High-Yielding Amaranth Accessions for Varietal Development Under Various Agroecologies of Malawi. Preprints2023, 2023100202. https://doi.org/10.20944/preprints202310.0202.v1
APA Style
Nyasulu, M., Chimzinga, S.Z., Maliro, M., Kamanga, R.M., Medison, R.G., & Sefasi, A. (2023). Stability Analysis and Identification of High-Yielding Amaranth Accessions for Varietal Development Under Various Agroecologies of Malawi. Preprints. https://doi.org/10.20944/preprints202310.0202.v1
Chicago/Turabian Style
Nyasulu, M., Rudoviko Galileya Medison and Abel Sefasi. 2023 "Stability Analysis and Identification of High-Yielding Amaranth Accessions for Varietal Development Under Various Agroecologies of Malawi" Preprints. https://doi.org/10.20944/preprints202310.0202.v1
Abstract
Amaranth has the potential to support Malawi's food and nutrition security, income generation and livelihoods, and climate change resilience efforts. Due to the high genetic variability of Ama-ranth, there is a need to develop stable and high-yielding genotypes for sustainable production. To determine the degree of genetic stability in different environments, five Amaranth accessions were subjected to stability analysis. The experiment was carried out at three sites (Bunda, Bembeke, and Chipoka) for two seasons in 2020-2021 in the central region of Malawi. It was laid out in Ran-domized Complete Block Design (RCBD) with four replicates. Eberhart and Russell linear regres-sion model was used for stability analysis and Pearson correlation was used to test the relationship between variables. Environmental variance + (genotype x environment) was significant for four of the parameters studied, namely grain yield, plant height, leaf length, and leaf width, indicating the presence of a remarkable interaction between genotypes and environment. The results of a pooled analysis of variance showed significant differences at a 5% significance level among the Amaranth accessions, indicating inherent genetic variability. Using the linear regression model of Eberhart and Russell, accessions PE-LO-BH -01 and LL-BH -04 were identified as the highest yielding stable genotypes for leaf and grain yield, respectively. In addition, Bembeke site was the most favourable environment for all the accessions. Thus, to enhance the production of amaranth in Malawi, LL-BH-04 and PE-LO-BH-01 were put forward for release as varieties for grain and leaf respectively. These results will also guide and support for future breeding programs.
Keywords
amaranth; environmental index; linear regression; stability
Subject
Biology and Life Sciences, Agricultural Science and Agronomy
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
