Niwas Ram, Anwer Md Arshad, Ranjan Tushar, Ghatak Abhijeet, Jain Khushbu, Kumar Jitesh, Bharti Aditya, Kumari Neha, Srivastava Jitendra Nath
Department of Plant Pathology, Bihar Agricultural University, Sabour 813210, Bhagalpur, India.
Department of Molecular Biology and Genetic Engineering, Bihar Agricultural University, Sabour 813210, Bhagalpur, India.
Bioengineering (Basel). 2022 Dec 21;10(1):7. doi: 10.3390/bioengineering10010007.
Northern corn leaf blight (NCLB) of maize, caused by (Pass.) Leonard and Suggs., is an important foliar disease common across maize-producing areas of the world, including Bihar, India. In this study, virulence and distribution of races were observed against -resistant genes and also identified the race population distribution in Bihar. For that, 45 isolates were collected from maize fields in Bhagalpur, Begusarai, Khagaria, Katihar and Samastipur districts between 2020 and 2022. These isolates were screened on maize differential lines containing and resistance genes. Five different physiological races were observed based on the symptoms response of the differential maize lines. These races are race 0, race 1, race 3, race 23N and race 123N. race 3 was the most prevalent race having 26.6% frequency followed by race 0 (24.4%) and race 1 (22.2%) and the least prevalent races were race 23N and 123N having 13.3% each. Varied resistance response of different isolates was observed on differential lines having different resistant genes. Despite the fact that virulence was seen against all resistance genes, NCLB control might be increased by combining qualitative resistance genes with quantitative resistance.
玉米北方叶斑病（NCLB）由（帕氏）伦纳德和萨格斯引起，是一种重要的叶部病害，在世界玉米产区普遍存在，包括印度比哈尔邦。在本研究中，观察了针对抗病基因的病原菌毒性和生理小种分布，并确定了比哈尔邦的生理小种种群分布。为此，在2020年至2022年期间，从巴格布尔、贝古萨赖、哈加里亚、加蒂哈尔和萨马斯蒂普尔等地区的玉米田中采集了45个病原菌分离株。这些分离株在含有抗病基因的玉米鉴别品种上进行筛选。根据鉴别玉米品种的症状反应，观察到了五种不同的生理小种。这些生理小种分别是0号小种、1号小种、3号小种、23N号小种和123N号小种。3号小种是最普遍的小种，频率为26.6%，其次是0号小种（24.4%）和1号小种（22.2%），最不普遍的小种是23N号小种和123N号小种，各占13.3%。在具有不同抗病基因的鉴别品种上观察到不同分离株的抗性反应各不相同。尽管对所有抗病基因都观察到了毒性，但通过将定性抗病基因与定量抗性相结合，可能会增强对玉米北方叶斑病的防治效果。
