Genetic Control of Plasticity in Root Morphology and Anatomy of Rice in Response to Water Deficit.
نویسندگان
چکیده
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.
منابع مشابه
Genetic control of rice root morphology and anatomy
34 Elucidating the genetic control of rooting behaviour under water-deficit stress is essential to 35 breed climate-robust rice cultivars. Using a diverse panel of 274 indica genotypes grown 36 under control and water-deficit conditions during vegetative growth, we phenotyped 35 traits, 37 mostly related to root morphology and anatomy, involving ~45,000 root scanning images and 38 nearly ~25,00...
متن کاملپاسخ ویژگیهای ریشه و تسهیم ماده خشک 40 ژنوتیپ اصلاح شده و بومی برنج (Oryza sativa L.) در شرایط کمآبیاری
Nowadays, the root characteristics as one of secondary traits along with grain yield are used to response evaluation of rice genotypes under deficit irrigation. Thus, to evaluate the root traits of 40 irrigated rice genotypes to water limited condition a pot experiment was performed in 2014 at Rice Research Institute (Rasht), Iran. Irrigation treatment was applied in two levels include con...
متن کاملDoes morphological and anatomical plasticity during the vegetative stage make wheat more tolerant of water deficit stress than rice?
Water scarcity and the increasing severity of water deficit stress are major challenges to sustaining irrigated rice (Oryza sativa) production. Despite the technologies developed to reduce the water requirement, rice growth is seriously constrained under water deficit stress compared with other dryland cereals such as wheat (Triticum aestivum). We exposed rice cultivars with contrasting respons...
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Rice is an essential crop in Iran that is grown mostly in areas where depth to groundwater is low. Root growth and water uptake of rice under shallow groundwater has not been thoroughly studied. This experiment was conducted to determine the lowland rice (cv. Ghasrodashti) root distribution above shallow groundwater in relation to deficit irrigation and groundwater depth in cylindrical gre...
متن کاملGenetic Control of Plasticity in Root Morphology and Anatomy of Rice in Response to Water Deficit1[OPEN]
Niteen N. Kadam, Anandhan Tamilselvan, Lovely M.F. Lawas, Cherryl Quinones, Rajeev N. Bahuguna, Michael J. Thomson, Michael Dingkuhn, Raveendran Muthurajan, Paul C. Struik, Xinyou Yin, and S.V. Krishna Jagadish International Rice Research Institute, Metro Manila, The Philippines Centre for Crop Systems Analysis, Department of Plant Sciences, Wageningen University and Research, 6700 AK Wageninge...
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ورودعنوان ژورنال:
- Plant physiology
دوره 174 4 شماره
صفحات -
تاریخ انتشار 2017