Broadening of genetic diversity (GD) in Canadian spring canola Brassica napus for the development of elite hybrid parent lines

春季油菜（也称为油菜籽）每年为美国经济贡献约140亿美元。 国家该作物物种的遗传多样性（GD）狭窄是研究人员和植物的主要关注点 育种者，以进一步提高其生产力。作物中存在足够的GD也是减少 作物易受虫害和疾病以及全球气候条件的其他变化的影响。 作物物种卡诺拉在自然界中起源于花椰菜/卷心菜类型的植物物种和 萝卜型植物物种;并且该作物物种中的窄GD显然是由于遗传瓶颈 发生在自然界的进化过程中。与卡诺拉相比，更广泛的GD存在于其两个祖先物种中 以及本种的其他变种，例如芜菁甘蓝，饲料油菜，欧洲冬油菜，中国 半冬油菜籽等。到目前为止，加拿大春季的改善工作有限， 通过使用欧洲冬季油菜籽生产油菜籽;然而，没有努力探索使用 包括它的亲本物种在内的许多其他外来种质。拟议的研究将探讨GD 不同的外来材料来改良这种作物。短期内，拟议的研究将 研究了萝卜、甘蓝、花椰菜、青花菜、芜菁甘蓝、半冬性油菜、 等类型的植物物种，以改善加拿大油菜在改善农艺和增加 生产力，确定有助于提高生产力的染色体区域，以及扩展我们的 了解这些材料的相对价值，以便在育种中有效和合理利用 程序.本项目的研究成果可应用于抗病高分子材料的开发 为加拿大大草原生产杂交油菜品种。

The crop spring canola (also known as rapeseed) contributes about $14 billion annually to the economy of this country. The narrow genetic diversity (GD) in this crop species is a major concern to researchers and plant breeders for further increasing its productivity. Presence of adequate GD in a crop is also needed for reducing the vulnerability of the crop to insect pests and diseases as well as other changes in global climatic conditions. The crop species canola originated in nature from crosses between a cauliflower/cabbage type plant species and a turnip type plant species; and the narrow GD in this crop species is apparently due to a genetic bottleneck occurred during its evolution in nature. Compared to canola, wider GD is present in its two progenitor species as well as in the other variants of this species, e.g. rutabaga, fodder rape, European winter canola, Chinese semi-winter rapeseed, etc. To date, limited efforts have been made for the improvement of Canadian spring canola through the use of European winter canola; however, no effort has been made to explore the use of many of the other exotic germplasm including its parental species. The proposed research will explore the GD in different exotic materials for the improvement of this crop. In the short-term, the proposed research will investigate the GD in different turnip, cabbage, cauliflower, broccoli, rutabaga, Chinese semi-winter rapeseed, etc. type plant species for the improvement of Canadian canola in terms of improved agronomy and increased productivity, identify the chromosome region(s) contributing to increased productivity, as well as extend our knowledge on the relative value of these materials for efficient and rational utilization in the breeding programs. The research results from this project can be applied for the development of disease resistant high yielding hybrid canola cultivars for the Canadian prairie.