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1.当栽培管理方法和环境条件,在较长时间内不适合种性要求时,花卉便不得不改变自己的性状和特性。 2.在采贮、装运、播种、育苗、移栽、定植等过程中发生机械混杂现象。 3.花卉的生物学混杂造成品种间或同品种间的天然杂交。 4.长期扦插、嫁接、自我授粉、病虫害等,使花卉出现花小色暗、高矮不齐、重瓣变单瓣等劣变退化现象,使其生活力、抗病力及其它特性产生退化变异。●控制措施 1.作为亲本的品种,不仅要注意花形、株形、花色等,还要注意一些不易看见的特
1. When cultivation and management methods and environmental conditions, for a long time does not meet the requirements of species, flowers have had to change their traits and characteristics. 2. In the storage, shipping, sowing, nursery, transplanting, planting and other processes occur in the process of mechanical hybrid phenomenon. 3. The hybrid biology of flowers causes natural crosses among varieties or between varieties. 4. Long-term cutting, grafting, self-pollination, pests and diseases, so that flowers appear small dark color, height irregularity, double petal degradation and other deterioration of the phenomenon, its vitality, disease resistance and other characteristics of degradation . ● Control Measures 1. As a parent variety, not only pay attention to the flower-shaped, plant-shaped, color, etc., but also pay attention to some not easy to see the special