Morphophysiological indicators of drought tolerance in sorghum hybrids
ABSTRACT The objective of this study was to assess the responses of sorghum hybrids to drought and select the most significant morphophysiological indicators to differentiate the hybrids grown under water deficit and well-watered conditions. Two field experiments were conducted simultaneously one un...
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Universidade Federal do Ceará
2025-02-01
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| Series: | Revista Ciência Agronômica |
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| author | Marcos Lopes de Campos Ignacio Aspiazú Paulo César Magalhães Abner José de Carvalho Pablo Fernando Santos Alves Arley Figueiredo Portugal |
| author_facet | Marcos Lopes de Campos Ignacio Aspiazú Paulo César Magalhães Abner José de Carvalho Pablo Fernando Santos Alves Arley Figueiredo Portugal |
| author_sort | Marcos Lopes de Campos |
| collection | DOAJ |
| description | ABSTRACT The objective of this study was to assess the responses of sorghum hybrids to drought and select the most significant morphophysiological indicators to differentiate the hybrids grown under water deficit and well-watered conditions. Two field experiments were conducted simultaneously one under well-watered and the other under water deficit conditions after the pre-flowering stage, evaluating four contrasting grain sorghum hybrids (DKB 540, BRS 310, BRS 332, and 50A10), in a randomized block experimental design with four replications. Means were subjected to individual and joint analysis of variance, and the effects of water conditions and sorghum hybrids were compared using the F-test (p < 0.05) and the Tukey's test (p ≤ 0.05), respectively. Multivariate canonical variable analysis and Pearson correlation were also applied. Water deficit significantly reduced grain yield in 23.9%. The higher grain yields of the evaluated sorghum hybrids are associated with the higher relative chlorophyll content, photosynthetically active leaf area, panicle diameter and mass, grain mass per panicle, threshing index, and 100-grain mass, and the lower number of lodged plants. Grain mass per panicle, 100-grain mass, panicle mass, number of lodged plants, relative chlorophyll content, and leaf area are the most important indicators for explaining drought tolerance variations in grain sorghum hybrids grown under water deficit and well-watered conditions. |
| format | Article |
| id | doaj-art-2fa912c7c6a6485ea8bb8d7e1ea153ed |
| institution | DOAJ |
| issn | 1806-6690 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Universidade Federal do Ceará |
| record_format | Article |
| series | Revista Ciência Agronômica |
| spelling | doaj-art-2fa912c7c6a6485ea8bb8d7e1ea153ed2025-08-20T03:01:04ZengUniversidade Federal do CearáRevista Ciência Agronômica1806-66902025-02-015610.5935/1806-6690.20250049Morphophysiological indicators of drought tolerance in sorghum hybridsMarcos Lopes de Camposhttps://orcid.org/0000-0002-1234-0702Ignacio Aspiazúhttps://orcid.org/0000-0002-0042-3324Paulo César Magalhãeshttps://orcid.org/0000-0001-7842-4506Abner José de Carvalhohttps://orcid.org/0000-0002-6644-5307Pablo Fernando Santos Alveshttps://orcid.org/0000-0001-9715-9111Arley Figueiredo Portugalhttps://orcid.org/0000-0001-6056-3233ABSTRACT The objective of this study was to assess the responses of sorghum hybrids to drought and select the most significant morphophysiological indicators to differentiate the hybrids grown under water deficit and well-watered conditions. Two field experiments were conducted simultaneously one under well-watered and the other under water deficit conditions after the pre-flowering stage, evaluating four contrasting grain sorghum hybrids (DKB 540, BRS 310, BRS 332, and 50A10), in a randomized block experimental design with four replications. Means were subjected to individual and joint analysis of variance, and the effects of water conditions and sorghum hybrids were compared using the F-test (p < 0.05) and the Tukey's test (p ≤ 0.05), respectively. Multivariate canonical variable analysis and Pearson correlation were also applied. Water deficit significantly reduced grain yield in 23.9%. The higher grain yields of the evaluated sorghum hybrids are associated with the higher relative chlorophyll content, photosynthetically active leaf area, panicle diameter and mass, grain mass per panicle, threshing index, and 100-grain mass, and the lower number of lodged plants. Grain mass per panicle, 100-grain mass, panicle mass, number of lodged plants, relative chlorophyll content, and leaf area are the most important indicators for explaining drought tolerance variations in grain sorghum hybrids grown under water deficit and well-watered conditions.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902025000100645&lng=en&tlng=enSorghum bicolor (L.) MoenchWater deficitMultivariate analysis |
| spellingShingle | Marcos Lopes de Campos Ignacio Aspiazú Paulo César Magalhães Abner José de Carvalho Pablo Fernando Santos Alves Arley Figueiredo Portugal Morphophysiological indicators of drought tolerance in sorghum hybrids Revista Ciência Agronômica Sorghum bicolor (L.) Moench Water deficit Multivariate analysis |
| title | Morphophysiological indicators of drought tolerance in sorghum hybrids |
| title_full | Morphophysiological indicators of drought tolerance in sorghum hybrids |
| title_fullStr | Morphophysiological indicators of drought tolerance in sorghum hybrids |
| title_full_unstemmed | Morphophysiological indicators of drought tolerance in sorghum hybrids |
| title_short | Morphophysiological indicators of drought tolerance in sorghum hybrids |
| title_sort | morphophysiological indicators of drought tolerance in sorghum hybrids |
| topic | Sorghum bicolor (L.) Moench Water deficit Multivariate analysis |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902025000100645&lng=en&tlng=en |
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