杂种优势是杂种在生长,产量和生活力等方面与其亲本相比所表现出的优越性,一般可分为三个主要类型。体质型,表现为杂种有机体营养部分的较强发育;生殖型,特点是繁殖器官的较强发育,如高结实率,种子和果实的较高产量;适应型,要求杂种有高度的生活力,有很强的适应性和竞争能力。育种学家和生物学家对衡量杂种优势的 Heterosis is the superiority of hybrids in comparison with their parents in terms of growth, yield and viability, and can generally be divided into three main types. Physiological, manifested as hybrid organism nutrition part of the strong development; reproductive type, characterized by strong development of reproductive organs, such as high seed setting rate, high yield of seeds and fruits; adaptable, hybrids require a high degree of viability, Has a strong adaptability and competitiveness. Breeders and biologists to measure heterosis