Next Article in Journal
Diversity and Domestication Status of Spider Plant (Gynandropsis gynandra, L.) amongst Sociolinguistic Groups of Northern Namibia
Previous Article in Journal
Constitution of Composite Cross Maize (Zea mays L.) Populations Selected for the Semi-Arid Environment of South Madagascar
Open AccessArticle

Response of U.S. Rice Cultivars Grown under Non-Flooded Irrigation Management

USDA-ARS, Dale Bumpers National Rice Research Center, Stuttgart, AR 72160, USA
Rice Research and Extension Center, University of Arkansas, Stuttgart, AR 72160, USA
Department of Chemistry and Physics, Arkansas State University, AR 72467, USA
Authors to whom correspondence should be addressed.
Agronomy 2020, 10(1), 55;
Received: 25 November 2019 / Revised: 19 December 2019 / Accepted: 20 December 2019 / Published: 31 December 2019
Achieving food security along with environmental sustainability requires high yields with reduced demands on irrigation resources for rice production systems. The goal of the present investigation was to identify traits and germplasms for rice breeding programs that target effective grain production (EGP) under non-flooded field systems where the crop can be subjected to intermittent water stress throughout the growing season. A panel of 15 cultivars was evaluated over three years regarding phenological and agronomic traits under four soil moisture levels ranging from field capacity (29% volumetric water content; VWC) to just above the wilting point (16% VWC) using subsurface drip irrigation. An average of 690 ha-mm ha−1 water was applied for the 30% VWC treatment compared to 360 ha-mm ha−1 for the 14% VWC treatment. The average soil moisture content influenced several traits, including grain quality. Regression analysis identified six traits that explained 35% of the phenotypic variability of EGP. Four varieties (PI 312777, Francis, Zhe 733, and Mars) were found possessing significant slopes for 10 or more traits that respond to a range in soil moisture levels, indicating that they may offer promise for future rice breeding programs. Furthermore, based on the contrasting responses of four parent cultivars, two mapping populations were identified as potential genetic resources for identifying new quantitative trait loci/genes for improving EGP of tropical japonica rice varieties. View Full-Text
Keywords: drought; water stress; yield; rice; water productivity; food security drought; water stress; yield; rice; water productivity; food security
Show Figures

Figure 1

MDPI and ACS Style

McClung, A.M.; Rohila, J.S.; Henry, C.G.; Lorence, A. Response of U.S. Rice Cultivars Grown under Non-Flooded Irrigation Management. Agronomy 2020, 10, 55.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop