中文摘要：

国外有关品种权保护对种业市场影响的研究表明：植物新品种保护的实施一般会改变种子市场结构,增强大型种子企业的竞争优势,提高行业的集中度。通过对我国品种权保护实施以来的种业基本情况的定量分析发现,植物新品种保护对我国种业的行业集中度的提高产生了显著的正向影响。模型显示,品种权保护对我国种业行业集中度CR4与CR10均呈正向影响关系,表明品种权保护的实施显著提高了我国种业的行业集中度。但其对CR4的影响更甚于CR10,说明品种权保护对行业领导者更有利。此外,行业内企业数量的变动和相关种业政策的实施也对我国种业市场结构的变化起到了显著影响。

英文摘要：

Overseas research proves that the implementation of variety rights protection will change the structure of seed industry,enhance the competitive advantage of large-scale enterprises and also improve the concentration ratio of these enterprises. Based on the analysis of basic situation of seed industry after the implementation of variety rights protection,this article shows that a significant positive impact has already produced. The model indicates that Concentration Ratio CR4 and CR10 bear a positive inter-impact relationship and that the variety rights protection influences CR4 much more deeply than iCR10,which means that such kind of protection is more favorable to industry leadership. Besides,the enterprises＇ number and the implementation of relevant policies also play an important role in China＇s structure transformation of seed industry.