highly significantP ≤ 10 −5
This revealed a QTL for grain weight per spike, designated QGwps.pku-7A , mapped to a ∼4.41-Mb interval on chromosome 7A (670.87 to 675.28 m b, Chinese Spring RefSeq v1.0), supported by 29 contiguous highly significant SNPs ( P ≤ 10 −5 ) ( Fig. 1H ).