Dysgenesic

Polymorphism under Dysgenesic Conditions. The variations manifested by bacteria are still more curious when the latter are placed under conditions unfavorable to their development.

Source: wiktionary

At the same time social change without corresponding environmental changes in other spheres turns itself on to dysgenesic trends.

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A more explicit articulation of Rielo's educational model involves an understanding of psychoethics that examines both the dysgenesic states that inhibit or perturb the capacity of human persons to act in accordance to the agency of the divine constitutive presence and the ontological remedy or ecstatic energy that can modify and correct the stated resistance within the dynamics of education in ecstasy.

Source: wiktionary

But the degree of fertility of these crossings varies greatly in different species, for while some are perfectly fertile (eugenesic), the progeny of others will rarely breed except with a mate belonging to one of the original species (paragenesic), whiles in other cases the hybrids produced are wholly infertile among themselves, and scarcely fertile with either of the parent species (dysgenesic), or wholly infertile (agenesic).

Source: wiktionary