Figure 1

Development of a CSSL testcross population and identification of heterotic loci. The Zheng58 × CSSL125 population exhibited significant heterosis for maize ear width. The sub-CSSL population was constructed from 152 homozygous sub-CSSL F2 plants, which were derived from a cross between CSSL125 and lx9801. The corresponding test population was constructed by crossing the test parent Zheng58 with sub-CSSLs. Red, green, and blue represent the genomes of lx9801 (receptor parent), Chang7-2 (donor parent), and Zheng58 (test parent), respectively.