这些做法对于植物的能育性常有损害,这一点是无可置疑的.That these processes are often injurious to the fertility of a plant cannot be doubted.这样的杂交随时都会发现有合理的间型能育性.Such crosses are found to be reasonably interfertile....
这样的双核体显然不能独立于单倍体阶段而存在.Such a dikaryon cannot apparently exist independently of the haploid phase.胚囊,普通具有8个遗传上相同的单倍体核.Embryo has most commonly eitht genetically identical haploid nuclei.它是单细胞真菌,有单倍体和二倍体两种存在形态.The fungus i...