Seed dormancy is also an important trait in breeding of maize, because it is associated with preharvest sprouting(PHS) which severely limits maize breeding study and application in many areas.

• 玉米的营养品质是现代玉米育种必须面对和亟待解决的课题，同样由于种子休眠性因素导致的穗发芽在某些地区是困扰玉米育种研究和应用的一大难题。