Fig. 2 Yield (0.14 g H₂O g^-1 fresh weight) trend of cultivars–lines developed since 1966. (A) Twelve cultivars–lines were grown at the International Rice Research Institute (IRRI) farm and the Philippine Rice Research (PhilRice) farm in the dry season of 1996. Each data point is a mean of the two locations. The relationship between grain yield and the year of release for each location was: y = -101 + 0.056x, r² = 0.52 (IRRI); y = -176 + 0.093x, r² = 0.60 (PhilRice). (B) Seven cultivars–lines were grown at IRRI farm in the dry season of 1998. Vertical, capped lines represent standard error

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