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玉米穗腐病籽粒抗性与穗轴抗性的相互影响
李云梦1, 喻 倩2, 王 昭1, 栾一凡1, 董朝沛1, 赵众欢2, 高景阳1, 许 静1, 宋云霞1, 周子键2, 陈甲法2, 吴建宇1
0
(1.河南农业大学农学院;2.河南农业大学生命科学学院)
摘要:
玉米穗腐病是世界上发生普遍、危害严重、防治困难的真菌病害, 目前已成为玉米生产上亟待解决的主要问题。本文分别以233份家系组成的 RIL群体和452份骨干自交系组成的关联群体为材料,穗轴接种拟轮枝镰孢后观察其籽粒抗性与穗轴抗性;同时,籽粒接种拟轮枝镰孢后观察其穗轴抗性与籽粒抗性。通过对比穗轴接种观察到的籽粒抗性与籽粒接种观察到的籽粒抗性,发现RIL群体中114份家系与关联群体中230份自交系经穗轴接种观察到的籽粒抗性与经籽粒接种观察到的籽粒抗性不一致;而通过对比籽粒接种观察到的穗轴抗性与穗轴接种观察到的穗轴抗性,发现RIL群体中138份家系与关联群体中247份自交系经籽粒接种观察到的穗轴抗性与经穗轴接种观察到的穗轴抗性不一致。籽粒抗性与穗轴抗性的相互影响可能涉及了新的抗病机制,这从新的角度加深了对玉米穗腐病抗性机制的认识。
关键词:  玉米穗腐病  拟轮枝镰孢  穗轴→籽粒抗性  籽粒→穗轴抗性
DOI:10.13430/j.cnki.jpgr. 20210412003
投稿时间:2021-04-12修订日期:2021-07-02
基金项目:小麦玉米生物学省部共建重点实验室开放课题
Interaction of the Resistance Between Kernel and Cob to Fusarium Ear Rot in Maize
LI Yun-meng1, YU Qian2, WANG Zhao1, LUAN Yi-fan1, DONG Chao-pei1, ZHAO Zhong-huan2, GAO Jing-yang1, XU Jing1, SONG Yun-xia1, ZHOU Zi-jian2, CHEN Jia-fa2, WU Jian-yu1
(1.College of Agronomy, Henan Agriculture University;2.College of Life Science, Henan Agriculture University)
Abstract:
Maize ear rot is a worldwide serious fungal disease, and at present has become one of the main problems in maize growing areas. However, the measure against this disease remains difficult. In this study, a RIL population comprising 233 lines and a natural population comprising 452 backbone inbred lines were used for evaluating ear rot resistance. The cobs were inoculated with Fusarium verticillioides to observe their kernel resistance and cob resistance; while the kernels were inoculated with F. verticillioides to observe their cob resistance and kernel resistance. By comparing the kernel resistance observed by inoculating cob and kernel resistance observed by inoculating kernel, it was found that the kernel resistance observed by inoculating cobs of 114 lines in RIL population and 230 inbred lines in associated population was not consistent with their kernel resistance observed by inoculating kernel. By comparing cob resistance observed by inoculating kernel with cob resistance observed by inoculating cob, it was found that the cob resistance observed by inoculating kernel of 138 families in RIL population and 247 inbred lines in associated population was not consistent with their cob resistance observed by inoculating cob. Collectively, the interaction between kernel resistance and cob resistance may involve a new disease resistance mechanism, which deepened the understanding of the resistance mechanism of maize ear rot from a new perspective.
Key words:  Maize ear rot  Fusarium verticillioides  cob→kernel resistance  kernel→cob resistance

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