Journal
BREEDING SCIENCE
Volume 65, Issue 2, Pages 111-119Publisher
JAPANESE SOC BREEDING
DOI: 10.1270/jsbbs.65.111
Keywords
auxins; drought avoidance; grain yield; gravitropism; quantitative trait locus; phytoremediation; root system architecture
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Funding
- Ministry of Agriculture, Forestry, and Fisheries of Japan (Genomics for Agricultural Innovation) [QTL-4003]
- Ministry of Agriculture, Forestry, and Fisheries of Japan (Genomics-based Technology for Agricultural Improvement) [RBS-2009]
- Grants-in-Aid for Scientific Research [15K18630] Funding Source: KAKEN
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The root system is an essential organ for taking up water and nutrients and anchoring shoots to the ground. On the other hand, the root system has rarely been regarded as breeding target, possibly because it is more laborious and time-consuming to evaluate roots (which require excavation) in a large number of plants than aboveground tissues. The root growth angle (RCA), which determines the direction of root elongation in the soil, affects the area in which roots capture water and nutrients. In this review, we describe the significance of RCA as a potential trait to improve crop production, and the physiological and molecular mechanisms that regulate RGA. We discuss the prospects for breeding to improve RGA based on current knowledge of quantitative trait loci for RGA in rice.
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