Abstract
Intensive evaluation of segregating populations for a pattern of drought stress in a target region is one of the best ways to select genotypes that mitigate adverse effect of drought. However, evaluation for yield and drought tolerance-related traits and genetic analysis using segregating populations under moisture stress is so far rare in Ethiopia. The present study was initiated to evaluate sorghum segregating populations, estimate the genetic variability, and identify the best-performing genotypes for yield and drought tolerance under moisture stress. The study was conducted during the 2016/2017 cropping season at Kobo and Meiso research stations. A bi-parental population was obtained from crossing two parents (Meco-1 x Birmash) with contrasting traits for drought tolerance. A total of 207 F2:3 genotypes were evaluated using an alpha lattice design. The sorghum genotypes were significantly different in their response to drought stress. Genotypes 26, 162, 187, 157, and 170 at Kobo and 42, 82, 87, 152, and 139 at Meiso were the best-performing genotypes in terms of grain yield. The shortest dates to flowering were registered from genotypes 42, 73, 57, 71, and 200 at Kobo and genotype 34, at Meiso suggesting the use of these materials for specific area moisture adaptations and drought escape. High heritability coupled with high genetic advance as percent of mean was noted for panicle harvest index and 1000-seed weight; hence, good progress is expected from selection for these traits. These genotypes appear well suited for further specific area drought stress adaptation breeding and research.
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The authors acknowledg USAID for funding this study.
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Birhan, T., Bantte, K., Paterson, A. et al. Evaluation and Genetic Analysis of a Segregating Sorghum Population under Moisture Stress Conditions. J. Crop Sci. Biotechnol. 23, 29–38 (2020). https://doi.org/10.1007/s12892-019-0091-0
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DOI: https://doi.org/10.1007/s12892-019-0091-0