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O.P

English term (open pollinated) for an open-pollinated and thus newly formed grape variety; see there.

Term (also erratic block) for the natural fertilisation of plant flowers, in English "open pollinated" (abbreviation O.P.). The stigmas of the flowers are "openly" pollinated, i.e. naturally by wind, insect or self-pollination (without artificial help from humans). If the grapevine seeds are sown later, then new descendants arise from them, whose pollen donor (father variety) is not known a priori. Cross-fertilisation with pollen from other varieties in the vicinity can occur through insects or wind, but also self-pollination (self-fertilisation). The father variety can only be assumed. open-pollinated is in contrast to deliberate crossing in...

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Sigi Hiss
freier Autor und Weinberater (Fine, Vinum u.a.), Bad Krozingen

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