在稻作农业起源和传播的研究中，植硅体对于发现、鉴定水稻遗存起到了重要的作用。但由于野生稻和栽培稻植硅体的区分存在不确定性，限制了植硅体在早期稻作研究中的应用。现代水稻样品普遍受到相互杂交的影响，区分水稻杂交对代用指标植硅体的影响将有助于我们更好地预测研究古环境的变化趋势。本项目以水稻杂交对扇型植硅体的影响研究为突破口，采用野生稻和栽培稻相互杂交，通过对比分析稻叶扇型植硅体的形态特征，从而揭示籼、粳杂交对水稻扇型植硅体形态特征的影响，探讨植入现代稻基因后的野生稻扇型植硅体形态变化规律，为明确物种杂交对代用指标的影响提供参考的同时，也为稻作农业起源植硅体的分析提供判别依据。

Phytolith plays an important role in discovering and identifying rice remains on the study of origin and spreading of rice agriculture. However, the application of phytolith was limited in early studies, due to the inadequate morphological research on phytolith from wild and cultivated rice. Modern rice samples are generally affected by cross hybridization. Distinguishing the effect of rice hybridization on proxy of phytolith will help us to better predict and study the trend of palaeoenvironments changes. This proposed project will be mainly focused on the effect of rice hybridization on fan-shaped phytolith. Wild rice and cultivated rice will be crossed, and the morphological characteristics of fan-shaped phytolith in leaves of hybrid progenies will be analyzed to evaluate the effect of Indica-Japonica hybridization on phytolith. The morphological changes of fan-shaped phytolith after implantation of modern rice gene will be identified. This project will provide scientific bases for clarifying the effect of species hybridization on proxies and discriminating phytolith in study of origin of rice agriculture.