1.Particularly in the plant kingdom, new species may arise from inter-specific hybrids which, although usually sterile, sometimes become fertile as a result of polyploidy.

2.Natural selection tends to eliminate mutant genes with harmful effects.  The agents of selection include predators; parasites and infectious diseases; competition for space, food, etc.;  climate and micro-climate condititions; and sexual selection.  *Sheldrake*

            To create a hybrid form using everything possible or whatever is available.