CollegeofLifeSciences;
ShandongAgriculturalUniversity;
Tai'an271018;
P.R.China;
DivisionofBiologicalSciences;
UniversityofColumbia;
U.S.A.;
CollegeofLifeSciences;
ShandongAgriculturalUniversity;
Tai'an271018;
P.R.China;
玉米; 四倍体; 二倍体; 杂种优势; 近亲繁殖; 剂量效应;