Marker-Assisted Pyramiding of CRa and CRd Genes to Improve the Clubroot Resistance of Brassica rapa

• 全文链接

利用CRa 和 CRd 基因分子标记辅助聚合提高甘蓝根肿病抗性的研究

关键词：

来源：

Genes

全文链接：

//agri.nais.net.cn/topic/downloadFile/8168f821-86b2-4679-b925-9bb213517b35

来源地址：

https://www.mdpi.com/2073-4425/13/12/2414

资源所属：

蔬菜育种专题

类型：

学术文献

语种：

英语

原文发布日期：

2022-12-19

摘要：

Clubroot, caused by Plasmodiophora brassicae, is an economically important soil-borne disease that threatens Brassicaceae crops worldwide. In recent years, the incidence area of Chinese cabbage (Brassica rapa ssp. pekinensis) clubroot disease has increased, which severely affects the yield and quality of Chinese cabbage. The resistance of varieties harboring the single clubroot-resistance (CR) gene is easily broken through by P. brassicae pathotypes. CRa and CRd, genetically identified in B. rapa, are CR genes known to be highly resistant to different P. brassicaea pathotypes. In our study, we perform the gene pyramiding of CRa and CRd in Chinese cabbages through marker-assisted selection (MAS), and develop homozygous pyramided lines. The newly generated pyramided lines exhibit greater resistance to six different pathotypes than that of two parental lines carrying a single CR gene. This study provides new CR-gene-pyramided lines for the development of clubroot-resistant Brassica varieties for future breeding programs.