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在 Lonnquist(1964)和 Paterniani(1967)的玉米改良穗行选择法中,其家系间与家系内选择均在同一常规种植期进行。在家系间选择阶段,通过多点的重复产量试验对家系实施选择。在家系内选择阶段,去雄区母本行为所有家系,父本行与其等量混合,由最优家系的选穗构成下一选择轮的新半同胞家系。但通常情况下,这些选穗的种子不足以进行下一选择轮的重复产量试验;为避免延长选择轮的期间,
In both Lonnquist (1964) and Paterniani (1967) maize improvement lines selection, both in-line and in-line selection were performed at the same routine planting date. In the family selection stage, multi-point reproductive yield tests were performed on the pedigree. In the family selection stage, all the male and female parents in the male region were mixed with the same amount, and the new half-sib families of the next selected group were formed by the selected members of the best family. However, in general, the seeds of these earns are not enough to carry out repeated yield tests on the next round of selection. To avoid prolonging the period of selection rounds,