CAJ | 학술논문

目前多数三系杂交稻组合抗病性较差,其抗病性受恢复系与不育系的共同影响,提高杂交稻抗性的关键是向三系亲本同步导入抗性基因.目前杂交稻的抗病育种基本立足于常规育种,但常规抗病育种方法存在一定的局限性;分子标记辅助选择在三系亲本抗病单基因导入和多基因聚合育种中均取得较大进展.针对存在的问题提出了抗病育种研究策略.
목전다수삼계잡교도조합항병성교차,기항병성수회복계여불육계적공동영향,제고잡교도항성적관건시향삼계친본동보도입항성기인.목전잡교도적항병육충기본립족우상규육충,단상규항병육충방법존재일정적국한성;분자표기보조선택재삼계친본항병단기인도입화다기인취합육충중균취득교대진전.침대존재적문제제출료항병육충연구책략.
Most of the existing three-line hybrid rice combinations show relatively poor disease resistances, and their resistances are closely related to their parents including the restorer and male sterile lines. Therefore, introduction of disease resistant genes into both parents is the key to improve the resistances of hybrid rice. Recently, the resistance breeding of hybrid rice is mainly based on conventional breeding methods. However, the conventional breeding methods have their inherent limits such as the environmental flexibility in identification of resistances, linkage drag and hardness to pyramid dominant resistant genes and recessive resistant genes in transfer of resistant genes. The molecular maker-assisted selection (MAS) has made good progress in both introduction of single resistance genes and pyramiding of different resistance genes in the breeding of three-line hybrid rice parents. In this paper, the authors discussed the issues of resistances of rice blast and bacterial leaf blight in three-line hybrid rice breeding and proposed corresponding research strategy for improving the disease resistances of hybrid rice.