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

作物春季油菜籽(也称为油菜籽)每年为这里的经济贡献约140亿美元。 国家。这种作物的遗传多样性(GD)很小，这是研究人员和植物主要关注的问题 饲养员进一步提高了它的生产率。在作物中存在足够的GD也是为了减少 作物对病虫害的脆弱性以及全球气候条件的其他变化。 油菜籽是由花椰菜/卷心菜类植物与油菜型油菜杂交而成。 一种萝卜类植物；该作物物种的狭义GD显然是由于遗传瓶颈所致 发生在自然界的进化过程中。与油菜籽相比，它的两个祖先种存在更广泛的GD 以及该物种的其他变种，如Rutabaga，饲料油菜，欧洲冬季油菜，中国 半冬油菜籽等。迄今为止，加拿大春季的改良努力有限。 通过使用欧洲冬季油菜籽；然而，还没有努力探索使用 许多其他外来种质，包括它的亲本物种。拟议的研究将探索GD 在不同的外来材料中改良这种作物。在短期内，拟议的研究将 研究了不同品种的萝卜、甘蓝、花椰菜、花椰菜、芥蓝、中国半冬性油菜、 等类型植物品种在改良加拿大油菜方面的农艺改良和增产 生产力，确定有助于提高生产力的染色体区域(S)，以及延长我们的 了解这些材料的相对价值，以便在育种中高效合理地利用这些材料 程序。本项目的研究成果可应用于抗病育种。 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.