Key;
Laboratory;
of;
Crop;
Genomics;
and;
Genetic;
Improvement;
of;
Ministry;
of;
Agriculture;
Key;
Laboratory;
of;
Crop;
Heterosis;
and;
Utilizition;
of;
Ministry;
of;
Education;
and;
Beijing;
Key;
Lab;
of;
Crop;
Genetic;
Improvement;
China;
Agricultural;
University,;
Beijing;
China100094;