Discipline: Breding Methods
Hybrid rice technology is considered to have the most potential and be readily exploitable to further raise the yield ceiling in the irrigated ecosystem. But successful exploitation over a large area depends on identifying stable hybrids. Yield heterosis is reported to be a variable trait, which depends not only on parent combinations but also on environmental conditions. Stability for yield of rice hybrids is therefore analyzed. We examined the stability of hybrids for yield in two sets of environ- ments categorized as low and high. Grain yield data of 10 trials conducted between the 1994 wet season (WS) and 1995 WS were used.