Large fruit size of sweet cherry cultivars has high priority in breeding programs due to its high market value. According to recent studies more loci were identified corresponding to fruit size trait in cherries. In our study 15 Hungarian sweet cherry cultivars were evaluated for the locus FW_G2a on LG2 and genetic results were compared with phenotypic data of 3–8 years.

Average fruit weight of sweet cherries ranged from 3.9 g (Müncheberger Frühe) to 10.3 g (Carmen).

Haplotypes associated with large fruit size were found in 11 cultivars, of which five (Germersdorfi Óriás, Katalin, Vera, Krupnoplodnaya, Carmen) proved to be homozygous. Two cultivars (Petrus and Stella) carried the haplotypes associated with small fruit size. Statistical analysis revealed correlation between genotype data and fruit weight phenotype.

Our results confirmed that genotyping the locus FW_G2a is an effective tool in early selection of individuals and can be utilized in cherry breeding programs.

由于其高市场价值，大果实的甜樱桃品种在育种计划中具有较高的优先级。根据最近的研究，鉴定了更多与樱桃果实大小性状相对应的位点。在我们的研究中，对 15 个匈牙利甜樱桃品种在 LG2 上的基因座FW_G2a进行了评估，并将遗传结果与 3-8 年的表型数据进行了比较。

甜樱桃的平均单果重在 3.9 克（Müncheberger Frühe）到 10.3 克（Carmen）之间。

在 11 个品种中发现了与大果实相关的单倍型，其中 5 个（Germersdorfi Óriás、Katalin、Vera、Krupnoplodnaya、Carmen）被证明是纯合的。两个栽培品种（Petrus 和 Stella）携带与小果实大小相关的单倍型。统计分析揭示了基因型数据和果实重量表型之间的相关性。

我们的结果证实，对基因座FW_G2a 进行基因分型是早期选择个体的有效工具，可用于樱桃育种计划。