Genotypic performance under intermittent and terminal drought screening in rainfed lowland rice

Adaptation of rice (Oryza sativa L.) genotypes in the rainfed lowlands of Lao PDR

“…Thus, VT450-2 and TSN9 (G5) would be the preferred genotypes for rainfed lowland conditions in southern Lao PDR. These results are consistent with adaptation to rainfall deficit being desirable for yield stability, so selection for improved drought tolerance should be of benefit Xangsayasane et al, 2014), with the intent to combine yield potential and grain yield under drought (Atlin et al, 2006;Blum, 2009Blum, , 2011Venuprasad et al, 2008).…”

Determination of the Water Potential Threshold at Which Rice Growth Is Impacted

“…However, these changes may vary according to the timing the stress is applied [36]. Drought stress imposed in the terminal stage of rice cycle is the most detrimental to grain yield, while plants may recover when the stress is applied in the vegetative stage [37]. This study was carried out as a refinement of the research of Reis et al [4], who studied different irrigation systems in lowland rice in Brazil.…”

Soil water potential and recoverable water stress in drought tolerant and susceptible rice varieties

“…Wopereis et al (1996) derived a drying function beyond −100 kPa, but they converted volumetric water content to SWP based on soil water retention characteristic curves. Several other researchers have also related SWP derived from volumetric water content to physiological responses during stress (Turner et al, 1986;Lilley and Fukai, 1994b;Boonjung and Fukai, 1996;Wopereis et al, 1996;Yang et al, 2007;Chu et al, 2013;Xangsayasane et al, 2014). In this study, we estimated SWP using a combination of tensiometric measurements and the mechanistic water flow model given by the Richards equation to examine if the SWP attained just before irrigation is resumed (i.e.…”