Capturing genetic variability and identification of promising drought-tolerant lines in exotic landrace derived population under reproductive drought stress in rice

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cg.authorship.typesCGIAR and developing country institute
cg.contributor.affiliationInternational Rice Research Institute
cg.contributor.affiliationVisva-Bharati University
cg.contributor.affiliationInternational Crops Research Institute for the Semi-Arid Tropics
cg.contributor.donorGovernment of India
cg.contributor.donorCGIAR Trust Fund
cg.contributor.initiativeAccelerated Breeding
cg.coverage.countryIndia
cg.coverage.iso3166-alpha2IN
cg.coverage.regionAsia
cg.coverage.regionSouthern Asia
cg.creator.identifierPARESH CHANDRA KOLE: 0000-0002-3181-1485
cg.creator.identifierPronob J Paul: 0000-0002-0915-3148
cg.creator.identifierArun Kumar Singh: 0000-0003-4757-8646
cg.creator.identifierVikas Kumar Singh: 0000-0002-1560-1648
cg.howPublishedFormally Published
cg.identifier.doihttps://doi.org/10.3389/fpls.2022.814774
cg.isijournalISI Journal
cg.issn1664-462X
cg.journalFrontiers in Plant Science
cg.number100646
cg.reviewStatusPeer Review
cg.volume13
dc.contributor.authorVenkateshwarlu, Challa
dc.contributor.authorKole, Paresh Chandra
dc.contributor.authorPaul, Pronob J.
dc.contributor.authorSingh, Arun Kumar
dc.contributor.authorSingh, Vikas Kumar
dc.contributor.authorKumar, Arvind
dc.date.accessioned2022-12-27T14:53:49Zen
dc.date.available2022-12-27T14:53:49Zen
dc.identifier.urihttps://hdl.handle.net/10568/126341
dc.titleCapturing genetic variability and identification of promising drought-tolerant lines in exotic landrace derived population under reproductive drought stress in riceen
dcterms.abstractDrought is one of the most predominant abiotic stresses in this century, leading to a drastic reduction in the yield of rainfed rice ecosystems. Breeding of drought-resilient rice varieties is very much in demand for sustainable rice production in drought-prone rainfed ecology. An experiment was designed under irrigated non-stress and drought-stress situations involving an exotic drought-tolerant landrace (Chao Khaw) and a high-yielding aromatic rice cultivar (Kasturi), and an F2:4 derived population of 156 breeding lines was developed at IRRI South Asia Hub, Hyderabad. The objective of the study was to assess the genetic variability, drought tolerance behavior, and identify promising breeding lines for different rice ecologies and drought breeding programs. Restricted maximum likelihood (REML) analysis using the mixed model approach revealed a considerable genetic variation in the population for yield and yield contributing traits in non-stress and drought-stress conditions. We observed very high heritability for all the selected traits under stress 2015 WS (73.8% to 85.3%) and 2016 WS (72.4% to 93.5%) and non-stress 2015 WS (68.2% To 92.9%) and 2016 WS (61.4% to 92.6%) environments, indicating possible selection for grain yield under drought stress and non-stress with the same precision level. None of the secondary traits except harvest index and biomass included in our study showed a positive association with grain yield, indicating indirect selection’s ineffectiveness in improving yield under drought. A total of 48 promising breeding lines were found to have a better yield than donor Chao Khaw (up to 38% advantage) and popular drought-tolerant cultivars Shabhagidhan (up to 48% advantage) in stress conditions and recommended for rainfed upland ecology, 34 breeding lines under the well-watered condition suited for rainfed lowland ecology. Overall, the study found 21 common breeding lines that showed their superiority in non-stress and under drought stress situations, fitting best in rainfed lowland ecology with occasional drought occurrence. The large genetic variation found in this population can be exploited further to develop a few forward breeding high-yielding lines with better drought tolerance ability and used as drought donors in drought breeding programs.en
dcterms.accessRightsOpen Access
dcterms.audienceAcademics
dcterms.audienceCGIAR
dcterms.audienceDevelopment Practitioners
dcterms.audienceDonors
dcterms.audienceExtension
dcterms.audienceFarmers
dcterms.audienceGeneral Public
dcterms.audienceNGOs
dcterms.audiencePolicy Makers
dcterms.audienceScientists
dcterms.available2022-02-14
dcterms.bibliographicCitationVenkateshwarlu, Challa, Paresh Chandra Kole, Pronob J. Paul, Arun Kumar Singh, Vikas Kumar Singh, and Arvind Kumar. "Capturing Genetic Variability and Identification of Promising Drought-Tolerant Lines in Exotic Landrace Derived Population Under Reproductive Drought Stress in Rice." Frontiers in plant science 13 (2022): 814774-814774.en
dcterms.extent12 p.
dcterms.issued2022-02-14
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherFrontiers Media
dcterms.subjectdrought toleranceen
dcterms.subjectabiotic stressen
dcterms.subjectvarietiesen
dcterms.subjectecologyen
dcterms.subjectriceen
dcterms.typeJournal Article

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