长久以来物种形成一直是进化生物学领域的核心问题。随着测序技术的快速发展，物种间的基因组分化式样的研究为理解物种形成机制及其遗传基础提供了新的途径。虽然在基因组分化式样的研究中基因组高分化区一直是人们关注的焦点，但遗传连锁（重组率）在基因组分化过程中所起的作用正在引起越来越多的关注。Oryza nivara是近期从不同的O. rufipogon群体中通过多次平行起源形成的物种，由于其丰富的基因组背景资源和清晰的进化历史，这两个类群是研究物种形成过程中基因组分化式样的良好体系。本项目拟通过种间高密度遗传连锁图谱的构建，对遗传连锁在O. nivara基因组分化过程中所起的作用进行分析，并据此检测基因组中受自然选择作用的区域，以及这些区域在基因组和不同起源地之间的分布式样。本研究将从遗传连锁的角度促进我们对物种形成过程中基因组分化式样和机制的理解，并为基因组受选区域的检测提供一种新的思路。

Speciation has long been the central question in evolutionary biology. With the rapid development of sequencing technology, studies of genomic differentiation patterns between species provide new insights into understanding the evolutionary processes and genetic basis underlying speciation. Although the genomic regions of elevated differentiation are always the focus in studies of genomic differentiation patterns, the role of genetic linkage (recombination rate) in the process of genome differentiation is becoming more and more concerned. Oryza nivara recently originates multiple times from different O. rufipogon populations, as their abundant genomic information and clear history of evolution, they are an excellent system for studying the genomic differentiation patterns in speciation. This project intends to analyse the impact of genetic linkage on the genomic differentiation of O. nivara by constructing high-density genetic linkage map, and detect the genomic regions subjected to natural selection as well as their distribution patterns in genome and different original places. This study will broaden our understanding of the pattern and mechanism of genomic differentiation in speciation and provide new insights into the detection of signature of selection.