Abstract Jamun (Syzygium cumini L.) is a high valued evergreen tree with medicinal importance, but still a minor fruit crop of Pakistan. Information regarding jamun genetic resources of Pakistan is missing. Even, its complete potential is not yet discovered. Therefore, research was designed to explore the genetic variation among jamun accessions collected from different growing regions of Pakistan. Among all the samples collected, pulp percentage varied from 49 to 92 % approximately. The highest pulp percentage was observed in TUK-03 and minimum was observed in SKUK-02. Weight of fruit (pulp + seed) varied from 2.67 (SKD-01) to 12.63 g (SFM-08). Data related to biochemical parameters also revealed variability. TSS (10.8–20.3 %) and TA (0.64–1.69 %) varied among accessions. In SFG-07, maximum phenolic content was observed (318.6 mg GAE/100 g) and minimum (23.00 mg GAE/100 g) in MWD-01. PCA biplot exhibited the highest phenotypic variability in SFM-08, SFS-02, TUK-03 and KDC-04. Dendrogram constructed from agglomerative hierarchical clustering (AHC) grouped the accessions into 3 diverse clusters. Qualitative and quantitative characters revealed large variability among jamun accessions, which can help in selection of parental material for future breeding programs.

中文翻译：

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巴基斯坦驯化和野生Jamun（Syzygium cumini）基因型的多样性和差异

摘要 Jamun (Syzygium cumini L.) 是一种具有药用价值的高价值常绿乔木，但仍是巴基斯坦的次要水果作物。缺少有关巴基斯坦贾蒙遗传资源的信息。甚至，它的全部潜力还没有被发现。因此，研究旨在探索从巴基斯坦不同种植区收集的贾蒙种质之间的遗传变异。在收集的所有样品中，纸浆百分比大约从 49% 到 92% 不等。在 TUK-03 中观察到最高的纸浆百分比，在 SKUK-02 中观察到最低。果实重量（果肉 + 种子）从 2.67 (SKD-01) 到 12.63 g (SFM-08) 不等。与生化参数相关的数据也揭示了可变性。TSS (10.8–20.3 %) 和 TA (0.64–1.69 %) 因种质而异。在 SFG-07 中，观察到最大的酚类含量 (318. 在 MWD-01 中为 6 毫克 GAE/100 克）和最小值（23.00 毫克 GAE/100 克）。PCA 双标图在 SFM-08、SFS-02、TUK-03 和 KDC-04 中表现出最高的表型变异性。从凝聚层次聚类 (AHC) 构建的树状图将种质分为 3 个不同的集群。定性和定量特征揭示了jamun 种质之间的巨大差异，这有助于为未来育种计划选择亲本材料。