Response of Sorghum to Cold Stress at Early Developmental Stage
Native and adapted to the semiarid tropical regions of Africa, sorghum (Sorghum bicolor) is generally sensitive to cold temperatures, especially during the early developmental stages. However, there is genetic variability within the existing germplasm in terms of tolerance to low temperatures. The h...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | International Journal of Agronomy |
| Online Access: | http://dx.doi.org/10.1155/2021/8875205 |
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| author | Amandin Rutayisire Geoffrey Lubadde Alice Mukayiranga Richard Edema |
| author_facet | Amandin Rutayisire Geoffrey Lubadde Alice Mukayiranga Richard Edema |
| author_sort | Amandin Rutayisire |
| collection | DOAJ |
| description | Native and adapted to the semiarid tropical regions of Africa, sorghum (Sorghum bicolor) is generally sensitive to cold temperatures, especially during the early developmental stages. However, there is genetic variability within the existing germplasm in terms of tolerance to low temperatures. The highland regions of Africa possess important sources of germplasm with adaptation to cold stress, since they tend to be cooler than the low land regions. The goals of the study were to evaluate and identify sorghum lines with tolerance to cold temperature stress and make recommendations on varieties that may be planted in the East African highland regions or used in plant breeding programs for cold tolerance. Forty sorghum genotypes were evaluated for emergence, shoot, and root development at seedling stage under controlled environment in growth chambers and in the field. Significant genotypic differences were detected for all evaluated traits. Correlation between controlled environment experiments and field trial results was mostly significant, suggesting that the growth chambers can be used to predict and identify cold-tolerant genotypes. Results showed that emergence and vigor are the best surrogate traits for selecting cold-tolerant genotypes. Using rank summation index, we were able to identify the best cold-tolerant sorghum genotypes (IS 25557, IS 25558, IS 25546, BM6, BM 29, IESV 90042LT, and Cytanobe) that can be used in future breeding programs and enhance adaptation and expansion of sorghum production further into the highland regions of Africa. |
| format | Article |
| id | doaj-art-700b3f95c721456d9c65102f304b736c |
| institution | Kabale University |
| issn | 1687-8159 1687-8167 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Agronomy |
| spelling | doaj-art-700b3f95c721456d9c65102f304b736c2025-02-03T01:25:11ZengWileyInternational Journal of Agronomy1687-81591687-81672021-01-01202110.1155/2021/88752058875205Response of Sorghum to Cold Stress at Early Developmental StageAmandin Rutayisire0Geoffrey Lubadde1Alice Mukayiranga2Richard Edema3Makerere Regional Center for Crop Improvement (MaRCCI), Department of Agricultural Production, Makerere University, P.O. Box 7062, Kampala, UgandaFaculty of Agriculture and Animal Science, Busitema University, P.O. Box 236, Tororo, UgandaMakerere Regional Center for Crop Improvement (MaRCCI), Department of Agricultural Production, Makerere University, P.O. Box 7062, Kampala, UgandaMakerere Regional Center for Crop Improvement (MaRCCI), Department of Agricultural Production, Makerere University, P.O. Box 7062, Kampala, UgandaNative and adapted to the semiarid tropical regions of Africa, sorghum (Sorghum bicolor) is generally sensitive to cold temperatures, especially during the early developmental stages. However, there is genetic variability within the existing germplasm in terms of tolerance to low temperatures. The highland regions of Africa possess important sources of germplasm with adaptation to cold stress, since they tend to be cooler than the low land regions. The goals of the study were to evaluate and identify sorghum lines with tolerance to cold temperature stress and make recommendations on varieties that may be planted in the East African highland regions or used in plant breeding programs for cold tolerance. Forty sorghum genotypes were evaluated for emergence, shoot, and root development at seedling stage under controlled environment in growth chambers and in the field. Significant genotypic differences were detected for all evaluated traits. Correlation between controlled environment experiments and field trial results was mostly significant, suggesting that the growth chambers can be used to predict and identify cold-tolerant genotypes. Results showed that emergence and vigor are the best surrogate traits for selecting cold-tolerant genotypes. Using rank summation index, we were able to identify the best cold-tolerant sorghum genotypes (IS 25557, IS 25558, IS 25546, BM6, BM 29, IESV 90042LT, and Cytanobe) that can be used in future breeding programs and enhance adaptation and expansion of sorghum production further into the highland regions of Africa.http://dx.doi.org/10.1155/2021/8875205 |
| spellingShingle | Amandin Rutayisire Geoffrey Lubadde Alice Mukayiranga Richard Edema Response of Sorghum to Cold Stress at Early Developmental Stage International Journal of Agronomy |
| title | Response of Sorghum to Cold Stress at Early Developmental Stage |
| title_full | Response of Sorghum to Cold Stress at Early Developmental Stage |
| title_fullStr | Response of Sorghum to Cold Stress at Early Developmental Stage |
| title_full_unstemmed | Response of Sorghum to Cold Stress at Early Developmental Stage |
| title_short | Response of Sorghum to Cold Stress at Early Developmental Stage |
| title_sort | response of sorghum to cold stress at early developmental stage |
| url | http://dx.doi.org/10.1155/2021/8875205 |
| work_keys_str_mv | AT amandinrutayisire responseofsorghumtocoldstressatearlydevelopmentalstage AT geoffreylubadde responseofsorghumtocoldstressatearlydevelopmentalstage AT alicemukayiranga responseofsorghumtocoldstressatearlydevelopmentalstage AT richardedema responseofsorghumtocoldstressatearlydevelopmentalstage |