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Performance of grain sorghum hybrids under drought stress using GGE biplot analyses
P S C Batista1, C B Menezes2, A J Carvalho1
1Centro de Ciências Exatas e Tecnológicas, Universidade Estadual de Montes Claros, Campus Janaúba, Janaúba, MG, Brasil.
Genetics and Molecular Research : GMR
|October 4, 2017
Summary
This study assessed grain sorghum hybrid performance under water stress, identifying top-yielding varieties like 1G282 and AG1090 for improved crop resilience. Results highlight significant yield reductions in drought conditions, emphasizing the need for stable hybrids.
Area of Science:
- Agronomy
- Plant Breeding
- Agricultural Science
Background:
- Grain sorghum (Sorghum bicolor) is a vital crop facing increasing climate variability.
- Post-flowering water stress significantly impacts crop yield and stability.
- Understanding genotype x environment interactions is crucial for developing resilient sorghum varieties.
Purpose of the Study:
- To evaluate the adaptability and stability of 29 grain sorghum hybrids under water-stressed and non-stressed conditions.
- To identify high-yielding and stable sorghum hybrids for diverse environments.
- To analyze genotype performance across different environmental conditions.
Main Methods:
- Field trials conducted in Nova Porteirinha-MG (2014-2015) and Teresina-PI (2014).
- Randomized complete block design with three replications for 29 grain sorghum hybrids.
- Analysis of variance and GGE biplot method for adaptability and stability assessment.
Main Results:
- Significant grain yield reduction observed under water stress conditions.
- Top-performing hybrids under water stress in Nova Porteirinha-MG included 50A50, AG1080, AG1090, DKB550, DKB590, Jade, and BM737.
- In Teresina-PI, hybrids 1G282, 1G244, and A9721R excelled under water stress.
- Overall highest yielding hybrids across all environments were 1G282, DKB540, A9721R, 1G100, and AG1090.
Conclusions:
- Grain sorghum yield is substantially affected by post-flowering water stress.
- Specific hybrids demonstrate superior adaptability and stability under drought conditions.
- The GGE biplot method effectively identified promising sorghum genotypes for breeding programs focused on stress tolerance.
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