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Wilting Point is An Overlooked Drought Tolerance Trait in Rice

التفاصيل البيبلوغرافية
العنوان: Wilting Point is An Overlooked Drought Tolerance Trait in Rice
المؤلفون: Punzalan, B., Laza, M.B., Vargas, Y., Rebolledo, C., Dingkuhn, Michael
المساهمون: International Rice Research Institute Philippines (IRRI), Consultative Group on International Agricultural Research CGIAR (CGIAR), International Center for Tropical Agriculture Colombie (CIAT), Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM), Département Systèmes Biologiques (Cirad-BIOS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), This research received funding from the Global Rice Science Partnership (GRiSP) of the Consultative Group for International Agricultural Research (CGIAR) .
المصدر: ISSN: 0115-463x ; Philippine Journal of Crop Science ; https://hal.inrae.fr/hal-04668506 ; Philippine Journal of Crop Science, 2023, 48 (3), pp.39-49 ; https://ovcre.uplb.edu.ph/journals-uplb/index.php/PJCS/article/view/1144.
بيانات النشر: HAL CCSD
The Federation of Crop Science Societies of the Philippines
سنة النشر: 2023
المجموعة: CIRAD: HAL (Recherche agronomique pour le développement / Agricultural Research for Development)
مصطلحات موضوعية: Climate change, Fraction of Transpirable Soil Water (FTSW), Genome-Wide Association Studies (GWAS), Oryza sativa L, soil moisture tension, soil water extraction, [SDV.SA]Life Sciences [q-bio]/Agricultural sciences, [SDE.MCG]Environmental Sciences/Global Changes, [SDV.BV.AP]Life Sciences [q-bio]/Vegetal Biology/Plant breeding, [SDV.GEN.GPL]Life Sciences [q-bio]/Genetics/Plants genetics, [SDV.SA.STA]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of agriculture
الوصف: International audience ; The soil moisture tension (SMT) at wilting point is by convention estimated at 15 bar (pF 4.2) and is thought to vary little among species and crop varieties. However, as rice is particularly drought sensitive, its wilting point may differ from this value and show genetic diversity. We phenotyped the critical SMT at which transpiration ceases as a genotypic trait for the PRAY-indica diversity panel (300 accessions). A dry-down approach in pots was used during tillering stage in greenhouse and phytotron experiments. Soil evaporation was suppressed and weight loss attributed to plant transpiration alone. Once weight was constant and plants terminally stressed, gravimetric soil moisture content was measured and converted to SMT by pF curve. Both experiments had three replicates as randomized blocks. Observed critical SMT varied significantly (P<0.0001) between 3 and 5 bar among genotypes, translating into a 14% difference in water extracted between these extrema in the paddy soil used. Dryland-adapted cultivars extracted more water than flooding-adapted ones. Broad-sense heritability (H 2 ) was between 0.61 and 0.72. A genome-wide association study (GWAS) identified 6 quantitative trait loci (QTL), co-localizing with 4 functionally plausible candidate genes, including two root nitrate reductases. In conclusion, the conventional wilting point does not apply to indica rice, which is much more sensitive. This has consequences for the calculation of the fraction of transpirable soil water (FTSW) parameter used in crop models. The observed genotypic differences and QTLs indicate that this new trait may useful in for breeding for drought tolerance.
نوع الوثيقة: article in journal/newspaper
اللغة: English
Relation: hal-04668506; https://hal.inrae.fr/hal-04668506
الاتاحة: https://hal.inrae.fr/hal-04668506
رقم الانضمام: edsbas.6399347
قاعدة البيانات: BASE
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