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- Title
The buffering capacity of stems: genetic architecture of nonstructural carbohydrates in cultivated Asian rice, Oryza sativa.
- Authors
Wang, Diane R.; Han, Rongkui; Wolfrum, Edward J.; McCouch, Susan R.
- Abstract
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 ( Oryza sativa) 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 Os HXK6 (rice hexokinase), ISA2 (rice isoamylase) and a tandem array of sugar transporters., 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.
- Subjects
ASIA; RICE; RICE -- Environmental aspects; RICE genetics; CARBOHYDRATE analysis; NEAR infrared spectroscopy; PLANT stems
- Publication
New Phytologist, 2017, Vol 215, Issue 2, p658
- ISSN
0028-646X
- Publication type
Article
- DOI
10.1111/nph.14614