Norwegian plum production is characterized by climatic limitations, different flowering time, deficiently of wholly-adapted cultivars and appropriate pollen donors for cultivars that can be grown in this region. This study evaluated the progamic phase of fertilization and fruit set in four European plum cultivars (´Mallard´, ´Edda´, ´Jubileum´, and ´Reeves´) after crossing with different pollinizers over two years (2018/2019). Reproductive parameters, in vitro pollen germination, number of pollen tubes in the upper part of the style and locule of the ovary, number of pistils with ovule penetrated by pollen tube, fruit set in all crossing combinations, and fruit set in open pollination of pollen recipient cultivars showed different adaptability of both recipient and donor cultivars to the specific ecological conditions prevailing in Western Norway. The pollinizers ´Victoria´, ´Opal´ and ´Č. Lepotica´ proved to be a very good pollinizers for cultivar ´Jubileum´, while pollinizers ´R. C. Souffriau´ and ´Valor´ for the cultivar ´Reeves´. Cultivars ´Opal´, ´R. E. Prolific´ and ´Mallard´ are excellent pollinizers for ´Edda´ in conditions of higher temperatures during flowering period and post-flowering period. Cultivar ´Č. Lepotica´ proved to be the best pollinizer for ´Edda´ in conditions when the temperatures were lower. Cultivars ´Opal´ and ´R. E. Prolific´ can be considered as good pollinizers for ´Mallard´.

挪威李子生产的特点是气候限制、开花时间不同、缺乏完全适应的品种和可在该地区种植的品种的合适花粉供体。本研究评估了四个欧洲李子品种（“Mallard”、“Edda”、“Jubilem”和“Reeves”）在与不同授粉媒介杂交两年后（2018/2019）的受精和坐果的程序阶段。体外生殖参数花粉萌发、子房花柱和室上部的花粉管数、花粉管穿透胚珠的雌蕊数、所有杂交组合坐果、花粉受体品种开放授粉坐果表现出不同的适应性接受者和捐赠者栽培品种与挪威西部普遍存在的特定生态条件相适应。授粉者“维多利亚”、“蛋白石”和“Č”。事实证明，Lepotica' 是品种“Jubileum”的非常好的授粉者，而品种“Reeves”的授粉者 'RC Souffriau' 和 'Valor'。栽培品种“蛋白石”、“RE Prolific”和“Mallard”是开花期和开花后期较高温度条件下“艾达”的优良授粉者。栽培品种 ´Č。事实证明，在温度较低的条件下，Lepotica' 是 'Edda' 的最佳授粉者。栽培品种“Opal”和“RE Prolific”可以被认为是“Mallard”的良好授粉者。