Contribution of root system architecture and function in the performance of tropical maize (Zea mays L.) genotypes under different moisture regimes

dc.creatorZaidi, P.
dc.creatorSeetharam, K.
dc.creatorVinayan, M.T.
dc.creatorRashid, Z.
dc.creatorKrishnamurthy, L.
dc.creatorVivek, B.
dc.date2022-09-23T00:05:14Z
dc.date2022-09-23T00:05:14Z
dc.date2022
dc.date.accessioned2023-07-17T20:09:28Z
dc.date.available2023-07-17T20:09:28Z
dc.identifierhttps://hdl.handle.net/10883/22183
dc.identifier10.21475/ajcs.22.16.06.p3572
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7513939
dc.descriptionUnderstanding how roots respond to increasing rate of evapotranspiration in warmer days and exposure to dry spells is crucial for saving productivity of rainfed crops, including maize, grown in Asian tropics. In a semi-automatic root phenotyping facility (lysimetric system) a set of 100 elite and diverse tropical maize inbred lines were phenotyped under managed drought stress (DT) and well-watered (WW) conditions. Plants were grown in PVC (Polyvinyl chloride) cylinder of 30.0 cm diameter and 150.0 cm length. In drought experiment, last irrigation was applied based accumulated growing degree days (∑GDD) criteria to achieved reproductive stress DT, whereas optimal moisture was maintained in WW trials. Data recorded on various root structural and function traits in both DT and WW trials. Significant phenotypic variability was observed for various root traits, including both structural and functional traits, under both the moisture regimes. Correlation studies showed that grain yield of early maturity group of genotypes was positively and significantly associated with all the root structural traits under drought, whereas, in case of medium and late maturity group of entries root structural traits showed either weak positive or significant negative correlation with grain yield under drought. Though, root functional traits of all the maturity group of genotypes showed positive and significant correlations with both grain yield and total biomass under both well-watered drought stress. Regression analysis showed that water uptake had significant positive relationship with total biomass in all the three-maturity group of genotypes. However, grain yield seems to be less dependent directly on the total amount of water uptake. We conclude that contribution of various traits in root system architecture under drought or well-watered conditions vary with maturity of genotypes. However, root functional traits, such as water uptake and transpiration efficiency are equally important across maturity groups and water availability regimes.
dc.description809-818
dc.languageEnglish
dc.publisherSouthern Cross Journals
dc.relationNutrition, health & food security
dc.relationAccelerated Breeding
dc.relationGenetic Innovation
dc.relationSyngenta Foundation for Sustainable Agriculture (SFSA)
dc.relationhttps://hdl.handle.net/10568/126600
dc.rightsCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
dc.rightsOpen Access
dc.source6
dc.source16
dc.source1835-2693
dc.sourceAustralian Journal of Crop Science
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectRoot System Architecture
dc.subjectWater Deficit
dc.subjectDROUGHT STRESS
dc.subjectMAIZE
dc.subjectROOT ARCHITECTURE
dc.subjectWATER
dc.subjectGENOTYPES
dc.titleContribution of root system architecture and function in the performance of tropical maize (Zea mays L.) genotypes under different moisture regimes
dc.typeArticle
dc.typePublished Version
dc.coverageAustralia


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