noun
Technical term used in botany and agriculture for the inability of plants to produce viable seeds or fruit.
この品種の不稔性は遺伝的要因による。
The infertility of this variety is due to genetic factors.
高温が不稔性を引き起こすことがある。
High temperatures can sometimes cause infertility.
稔性 means fertility (of plants), the opposite of 不稔性.
Compound of 不 (fu, 'not') + 稔 (nen, 'to bear fruit') + 性 (sei, '-ity'). The kanji 稔 is relatively rare and primarily used in botanical contexts.