Hussain, M.M.; Rauf, S.; Noor, M.; Bibi, A.; Ortiz, R.; Dahlberg, J. Evaluation of Introgressed Lines of Sunflower (Helianthus annuus L.) under Contrasting Water Treatments. Agriculture2023, 13, 1250.
Hussain, M.M.; Rauf, S.; Noor, M.; Bibi, A.; Ortiz, R.; Dahlberg, J. Evaluation of Introgressed Lines of Sunflower (Helianthus annuus L.) under Contrasting Water Treatments. Agriculture 2023, 13, 1250.
Hussain, M.M.; Rauf, S.; Noor, M.; Bibi, A.; Ortiz, R.; Dahlberg, J. Evaluation of Introgressed Lines of Sunflower (Helianthus annuus L.) under Contrasting Water Treatments. Agriculture2023, 13, 1250.
Hussain, M.M.; Rauf, S.; Noor, M.; Bibi, A.; Ortiz, R.; Dahlberg, J. Evaluation of Introgressed Lines of Sunflower (Helianthus annuus L.) under Contrasting Water Treatments. Agriculture 2023, 13, 1250.
Abstract
Drought stress is a major production constraint in crops globally. Crop wild relatives are important source of resistance and tolerance for both biotic and abiotic stresses, respectively. A breeding program was initiated to introgress drought tolerance in sunflower through hybridization between the wild species Helianthus argophyllus and the cultigen pool of H. annuus. Selection was carried out in the F2 to F5 segregating populations for high cuticular waxes, smaller leaf area, single heading and high oil content. The selected F5 breeding lines were compared with non-adapted elite sunflower germplasm in a replicated randomized complete block research project using different water treatments comparing fully irrigated (T0), with 75 (T1), 50 (T2) and 25% (T3) irrigation treatments. The comparison between the two types of germplasm showed that drought tolerant breeding lines had comparatively lesser decreases in leaf area, shoot weight and root shoot ratio 10 under the various drought treatments. Leaf area of the drought selected F5 lines were smaller than that of the elite germplasm under controlled irrigated treatments, but they maintained their leaf area under the drought treatments. Several drought resistant promising lines D-2, D-5, and D-27 were identified and showed high leaf area, great root length and increase root to shoot ratio under the highest stressed treatments (T3). Some of the lines could be directly used for the development of drought tolerant hybrids. Combining ability test indicated D-27 (F7) as good general combiner for seed yield plant−1 and oil contents when mated with male line RSIN.82. These hybrids could help to minimize seed yield losses due to water stress and to achieve profitable cultivation of sunflower in 18 arid regions of Pakistan.
Keywords
drought stress; introgression; leaf area; root to shoot ratio; wild species; yield loss
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.
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