Fig. 2

Time trend of important dataset characteristics used to assess genetic gain. A Evolution of the number of lines evaluated for this analysis according to the year the cross was initially made. The color gradient indicates the average reliability associated with the breeding values for yield. B Time trend in average breeding value for grain yield across years. The error bars represent the standard error associated with the mean. The blue line represents the linear regression of the breeding value for grain yield on the year. C Evolution of the average equivalent complete generation (EqG) of the lines through time. The error bars represent the standard error associated with the mean