The
average rice yield in RS (about 7 t ha-
¹) is well above the average
yield of Brazil (about 4 t ha-1), but still below the potential
yield, greatly due to biotic factors, among them weedy red rice
(Marchezan et al., 2004). Because agriculture is a vulnerable
sector to climate change (IPCC, 2007; Fagundes et al., 2010a,
b)