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Evaluation of wheat genotypes for heat stress tolerance and identification of early stress indicators

dc.contributor.authorChileshe, P.
dc.contributor.authorChikuta, S.
dc.contributor.authorLungu, D.
dc.contributor.authorKamfwa, K.
dc.contributor.authorOmondi, J.O.
dc.date.accessioned2023-10-05T10:44:46Z
dc.date.available2023-10-05T10:44:46Z
dc.date.issued2023-06-30
dc.identifier.citationChileshe, P., Chikuta, S., Lungu, D., Kamfwa, K. & Omondi, J.O. (2023). Evaluation of wheat genotypes for heat stress tolerance and identification of early stress indicators. Plant Physiology Reports, 28, 1-13.
dc.identifier.issn2662-253X
dc.identifier.urihttps://hdl.handle.net/20.500.12478/8270
dc.description.abstractHeat stress is an abiotic factor that reduces wheat yields. This study assessed the morphological and physiological traits essential for early detection of heat tolerance in wheat and identified suitable genotypes for specific agro-ecologies prone to heat stress in Zambia. Twelve wheat genotypes were evaluated in a heat-stress environment (Chakanka) and a non-stress heat environment (UNZA). Early heat stress indicators like leaf thickness and chlorophyll content had a 92% and 90% relationship with the yields of heat-tolerant genotypes, respectively. An increase in either or both parameters improved the yields of heat-tolerant genotypes relative to the susceptible ones. Among the heat-tolerant genotypes, Entry 48 had the highest yield (5866.5 kg ha−1) at the heat-stress site; this yield was 51.2% higher than that of the most susceptible genotype, Kwale (2864.0 kg ha−1). Entry 48 was more adapted to heat stress and yielded better than others due to early flowering (53.8 days to 50% flowering) and longer grain-filling duration (40.3 days). Entry 48 possessed traits of a climate-smart variety and could be a candidate for breeding future heat-tolerant and high-yielding wheat varieties.
dc.description.sponsorshipUniversity of Zambia
dc.description.sponsorshipRegional Universities Forum for Capacity Building in Agriculture
dc.format.extent1-13
dc.language.isoen
dc.subjectHeat Tolerance
dc.subjectZambia
dc.subjectStress
dc.subjectIndicators
dc.subjectBreeding
dc.subjectWheat
dc.subjectGenotypes
dc.titleEvaluation of wheat genotypes for heat stress tolerance and identification of early stress indicators
dc.typeJournal Article
cg.contributor.affiliationCorteva Agriscience, Zambia
cg.contributor.affiliationUniversity of Zambia
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionSouthern Africa
cg.coverage.countryZambia
cg.coverage.hubEastern Africa Hub
cg.identifier.bibtexciteidCHILESHE:2023
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectFood Security
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Production
cg.journalPlant Physiology Reports
cg.notesPublished online: 30 Jun 2023
cg.accessibilitystatusLimited Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCopyrighted; all rights reserved
cg.targetaudienceScientists
cg.identifier.doihttps://doi.org/10.1007/s40502-023-00735-7
cg.iitaauthor.identifierJohn Omondi: 0000-0003-3521-8686
cg.futureupdate.requiredNo
cg.identifier.volume28


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