It aimed to investigate the influence of seed origin and weight on the germination, survival, and growth of Persian oak seedlings in the Cheleh and Vijenan areas of Gilan-e Gharb county.    Methods: In this study, Persian oak seeds were collected in 2021 from two different origins in Gilan-e Gharb county (Cheleh village at an elevation of 1110 meters and Vijenan district at an elevation of 850 meters). The seeds were measured for morphological characteristics (weight, length, and width) and >Results: The findings of this study indicate that seed weight and geographical origin have a significant effect on the Dixon's Quality Index (DQI) of Persian oak seedlings. Based on statistical analyses, the heavy seeds from the Vijenan region, which were sown immediately after collection, produced seedlings with the highest quality. In contrast, the light seeds from the Cheleh region, sown after a 20-day delay, exhibited the lowest quality. It was also determined that seed weight and geographical origin had distinct and significant effects on various aspects of the growth and survival of Persian oak seedlings. While seed weight had a limited effect on germination and initial survival, it significantly influenced vegetative indices such as collar diameter, height, and leaf count. Specifically, heavy seeds demonstrated a clear superiority in all stages of seedling growth. On the other hand, seed origin also had varying effects; seeds from the Cheleh region performed better in terms of germination and height growth, whereas seeds from the Vijenan region were superior in the seedling quality index (DQI). Concluding Remarks:  The findings demonstrate that utilizing heavier seeds and implementing immediate sowing post-harvest in the Vijenan area yields superior quality seedlings. These results offer valuable insights for developing effective strategies for the rehabilitation of Zagros forest ecosystems.

   The Zagros forests are the second largest forested region in Iran, predominantly composed of oak trees, which is why these forests are referred to as the Western Oak Forests. A portion of the Zagros forests is located in Kermanshah Province, where two oak species, Quercus brantii (Persian oak) and Quercus infectoria, are distributed. The objective of this research was to investigate the quantitative and qualitative characteristics of oak seeds in Kermanshah Province. For this purpose, seed samples were collected from various locations within the province's forests and tra  orted to the laboratory. In the laboratory, quantitative traits of the seeds such as the weight and length of the whole fruit, length, weight, diameter, and volume of the nut (achene), as well as the weight and thickness of the cupule were measured for both species. Subsequently, after determining the moisture content and pest infestation rate of the seeds, the concentrations of iron, copper, zinc, manganese, phosphorus, and nitrogen, along with the protein content of the seed coat (pericarp) and kernel, were analyzed. Finally, statistical software was used to analyze the quantitative and qualitative data of the seeds. The results revealed that all quantitative and qualitative characteristics of the seeds from both species, collected from different locations across the province, exhibited statistically significant differences both intra species and inter species.    Keywords: Chemical elements, Oak seed, Quercus infectoria, Quercus brantii