Details

Autor(en) / Beteiligte

• Kadam, Niteen N.
• Tamilselvan, Anandhan
• Lawas, Lovely M.F.
• Quinones, Cherryl
• Bahuguna, Rajeev N.
• Thomson, Michael J.
• Dingkuhn, Michael
• Muthurajan, Raveendran
• Struik, Paul C.
• Yin, Xinyou
• Jagadisha, S.V. Krishna

Titel

Genetic Control of Plasticity in Root Morphology and Anatomy of Rice in Response to Water Deficit

Ist Teil von

• Plant physiology (Bethesda), 2017-08, Vol.174 (4), p.2302-2315

Ort / Verlag

United States: American Society of Plant Biologists

Erscheinungsjahr

2017

Quelle

MEDLINE

Beschreibungen/Notizen

• Elucidating the genetic control of rooting behavior under water-deficit stress is essential to breed climate-robust rice (Oryza sativa) cultivars. Using a diverse panel of 274 indica genotypes grown under control and water-deficit conditions during vegetative growth, we phenotyped 35 traits, mostly related to root morphology and anatomy, involving 45,000 root-scanning images and nearly 25,000 cross sections from the root-shoot junction. The phenotypic plasticity of these traits was quantified as the relative change in trait value under water-deficit compared with control conditions. We then carried out a genome-wide association analysis on these traits and their plasticity, using 45,608 high-quality single-nucleotide polymorphisms. One hundred four significant loci were detected for these traits under control conditions, 106 were detected under water-deficit stress, and 76 were detected for trait plasticity. We predicted 296 (control), 284 (water-deficit stress), and 233 (plasticity) a priori candidate genes within linkage disequilibrium blocks for these loci. We identified key a priori candidate genes regulating root growth and development and relevant alleles that, upon validation, can help improve rice adaptation to water-deficit stress.