期刊
NEW PHYTOLOGIST
卷 215, 期 2, 页码 658-671出版社
WILEY
DOI: 10.1111/nph.14614
关键词
carbon allocation; climate; genome-wide association; near-infrared spectroscopy; nonstructural carbohydrates (NSC); Oryza sativa; plasticity
资金
- USDA NIFA [2014-67003-21858]
- NSF PGRP [1026555]
- National Science Foundation [DGE-1144153]
- NIFA [687469, 2014-67003-21858] Funding Source: Federal RePORTER
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 OsHXK6 (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.
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