The “Souri” olive cultivar, which is autochthonous to the eastern Mediterranean region, has been the major olive variety cultivated traditionally under rain-fed conditions in northern Israel. The aim of this study was to determine the optimal pollen donor for the olive cultivar Souri in order to maximize Souri fruit set. Artificial cross pollination of Souri flowers with several local varieties has identified the ”Nabali” as the most efficient pollinizer of the Souri. However, further experiments using artificial cross pollination conducted with cultivars not common to this region have revealed the “Arbequina” as a more efficient pollinizer of the Souri cultivar than the Nabali. Based on a preliminary paternity analysis, the Nabali was identified as the dominant pollinizer of Souri trees in traditional olive orchards in the north of Israel. However, in a multi-variety orchard, molecular paternity analysis has shown Arbequina to be the most frequent pollinizer. We then tested, during two consecutive years, whether the presence of a pollen-producing Arbequina tree adjoining Souri trees in the field will increase their fruit set. We found that Souri fruit set was 8.36% when pollinized by an Arbequina tree in close proximity to them, significantly higher than the fruit set of 5.6% for Souri trees without the nearby Arbequina cultivar. On the basis of these trials, we expect that the yield of Souri orchards will improve if Arbequina trees are planted.

中文翻译：

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“ Arbequina”和“ Souri”橄榄品种之间的兼容性可能会增加Souri水果的含量†

“ Souri”橄榄栽培品种是地中海东部地区的土生土长，是以色列北部传统上在雨水条件下栽培的主要橄榄品种。这项研究的目的是确定橄榄品种Souri的最佳花粉供体，以使Souri的坐果最大化。Souri花的人工异花授粉与几种当地品种的杂交授粉已将“ Nabali”确定为Souri的最有效传粉剂。但是，使用人工异花授粉对这个地区不常见的品种进行的进一步实验显示，“ Arbequina”是Souri品种比Nabali更为有效的授粉剂。根据初步的亲子关系分析，Nabali被确定为以色列北部传统橄榄园中Souri树的主要授粉剂。但是，在一个多品种的果园中，分子亲子鉴定表明Arbequina是最常见的授粉剂。然后，我们连续两年测试了田间与Souri树相邻的产花粉的Arbequina树是否会增加其坐果。我们发现，当Souri果树被附近的一棵Arbequina树授粉时，其坐果率是8.36％，明显高于没有附近Arbequina品种的Souri树的坐果率5.6％。根据这些试验，我们希望如果种植Arbequina树，Souri果园的产量将提高。在田间存在与苏里树相邻的产花粉的Arbequina树是否会增加其坐果。我们发现，当Souri果树被附近的一棵Arbequina树授粉时，其坐果率是8.36％，明显高于没有附近Arbequina品种的Souri树的坐果率5.6％。根据这些试验，我们希望如果种植Arbequina树，Souri果园的产量将提高。在田间存在与苏里树相邻的产花粉的Arbequina树是否会增加其坐果。我们发现，当Souri果树被附近的一棵Arbequina树授粉时，其坐果率是8.36％，明显高于没有附近Arbequina品种的Souri树的坐果率5.6％。在这些试验的基础上，我们希望如果种植Arbequina树，Souri果园的产量将提高。