Breeding drought tolerant rice for shallow rainfed ecosystem of eastern India

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dc.creatorSwain, Padmini
dc.creatorRaman, Anitha
dc.creatorSingh, S.P.
dc.creatorKumar, Arvind
dc.date2017-08
dc.date2024-12-19T12:54:36Z
dc.date2024-12-19T12:54:36Z
dc.date.accessioned2026-06-27T04:11:45Z
dc.descriptionIn shallow rainfed rice agro-ecosystems, drought stress can occur at any growth stage and can cause a significant yield reduction. During recent years, some rice varieties possessing tolerance of reproductive-stage drought stress have recently been developed. Tolerance of vegetative-stage drought stress is also required to improve rice productivity in drought-prone regions. In this study, we evaluated a set of rice breeding lines for their response to a range of different types of vegetative-stage drought stress in order to propose standardized phenotyping protocols for conducting vegetative-stage drought stress screening trials and also to identify genotypes combining tolerance of vegetative- and reproductive-stage drought stress. A soil water potential threshold of −20 kPa during the vegetative stage was identified as the target for effective selection under vegetative stage with grain yield reduction of about 50% compared to irrigated control trials. Genotypes identified as showing high yield under reproductive-stage drought stress were not necessarily the genotypes showing best performance under vegetative-stage drought stress. Genotypes IR72667-16-1-B-B-3, IR78908-126-B-2-B, and IR79970-B-47-1 showed tolerance of both vegetative-stage and reproductive-stage drought stress. For most, the genotypes that were best under vegetative stage drought or even vegetative stage + reproductive stage drought were different from the genotypes that were best under reproductive stage drought. Based on the cultivar superiority measure, IR69515-6-KKN-4-UBN-4-2-1-1-1 and IR78908-126-B-1-B were the stable genotypes (indicated by low Pi) under both irrigated control and severe vegetative stress conditions, genotypes IR83614-203-B and IR78908-80-B-3-B were stable under irrigated control conditions and moderate stress, whereas IR72667-16-1-B-B-3 was stable under both moderate and severe vegetative-stage stress conditions
dc.identifierhttps://hdl.handle.net/10568/165015
dc.identifier.urihttp://hdl.handle.net/123456789/24697
dc.languageen
dc.publisherElsevier
dc.rightsOpen Access
dc.sourceSwain, Padmini; Raman, Anitha; Singh, S.P. and Kumar, Arvind. 2017. Breeding drought tolerant rice for shallow rainfed ecosystem of eastern India. Field Crops Research, Volume 209 p. 168-178
dc.titleBreeding drought tolerant rice for shallow rainfed ecosystem of eastern India
dc.typeJournal Article

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Instituto Internacional de Investigación del Arroz (IRRI)