Figure 7.

Two rounds of yield trials of barley low phytic acid (lpa) near-isogenic wild-type (normal phytic acid) lines, conducted in 2002 and 2003 and then in 2010 and 2011. Four pairs of near-isogenic lines, each pair consisting of a wild-type (normal phytic acid) sib and a lpa sib, were evaluated in several locations in Idaho (USA). These locations were either irrigated (two locations in 2002/2003 and three locations in 2010/2011) or rain-fed (non-irrigated; two locations in both 2002/2003 and 2010/2011) [27,89]. The homozygous lpa member of each isoline pair are: lpa1-1, which conditions a ~47% reduction in seed phytic acid; lpa2-1, which conditions a ~50% in seed phytic acid; lpa3-1, which conditions a ~65% reduction in seed phytic acid; lpa-M955, which conditions a ~95% reduction in seed phytic acid. (A,B): Trials conducted in 2002 and 2003. (C,D): Trials conducted in 2010 and 2011. The error bars represent the standard deviation of the mean, or standard error, n = 12 to n = 36. Linear regression of yield against % phytate reduction (indicated by red lines) was calculated for the lpa isolines in the irrigated trials.