The buffering capacity of stems [electronic resource] : genetic architecture of nonstructural carbohydrates in cultivated Asian rice, <i>Oryza sativa</i>

• Ngôn ngữ: eng
• Ký hiệu phân loại: 633.1 Cereals
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Energy Efficiency and Renewable Energy ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2017
• Mô tả vật lý: Size: p. 658-671 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 263209
• Chủ đề: 1. 09 biomass fuels; 2. Carbon allocation; 3. Climate; 4. Genome-wide association; 5. Near-infrared spectroscopy

Tóm tắt

 Harnessing stem carbohydrate dynamics in grasses offers an opportunity to help meet future demands for plant-based food, fiber and fuel production, but requires a greater understanding of the genetic controls that govern the synthesis, interconversion and transport of such energy reserves. We map out a blueprint of the genetic architecture of rice (<
 i>
 Oryza sativa<
 /i>
 ) stem nonstructural carbohydrates (NSC) at two critical developmental time-points using a subpopulation-specific genome-wide association approach on two diverse germplasm panels followed by quantitative trait loci (QTL) mapping in a biparental population. Overall, 26 QTL are identified
  three are detected in multiple panels and are associated with starch-at-maturity, sucrose-at-maturity and NSC-at-heading. They tag <
 i>
 OsHXK6<
 /i>
  (rice hexokinase), <
 i>
 ISA2<
 /i>
  (rice isoamylase) and a tandem array of sugar transporters. Furthermore, this study provides the foundation for more in-depth molecular investigation to validate candidate genes underlying rice stem NSC and informs future comparative studies in other agronomically vital grass species.