A. B. Borges, J. Huzar-Novakowiski, M. Pasquali, D. Baretta
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引用次数: 0
摘要
白霉病是由真菌 Sclerotinia sclerotiorum 引起的一种病害，被认为是大豆作物中最具破坏性的病害之一，会造成巨大的产量损失。在本研究中，我们旨在通过分析 67 种巴西大豆基因型在受控条件下对 S. sclerotiorum 的表型反应，为该病害的遗传控制做出贡献。当植物生长到四节阶段时，人工接种菌丝盘。所有大豆基因型都出现了白霉症状。通过测量接种后 7 天主茎上病斑的长度来确定抗性反应的特征。在接受评估的 67 个基因型中，9 个基因型对 S. sclerotiorum 表现出较强的抗性，包括 17S-01443-L8、16S-00630-L4、GER_00003、13S-00001-L2/FPS 2457 RR、BMX Torque I2X、P95Y02 IPRO、17S-00842-L5、HO Pirapó IPRO 和 TMG 2359 IPRO。23 个基因型表现出中间反应，而 35 个基因型则表现出对 S. sclerotiorum 更强的敏感性。应在田间条件下对受控条件下对 S. sclerotiorum 表现出更强抗性的大豆基因型进行进一步研究。
Characterisation of the Phenotypic Reaction of Brazilian Soybean Genotypes to Sclerotinia sclerotiorum Under Controlled Conditions
White mould is a disease caused by the fungus Sclerotinia sclerotiorum, and it is considered one of the most devastating diseases in soybean crops, causing huge losses in productivity. In this study, we aimed to contribute to the genetic control of this disease by characterising the phenotypic reaction of 67 Brazilian soybean genotypes to S. sclerotiorum under controlled conditions. Plants were artificially inoculated with mycelium discs when they reached the four-node phenological stage. Symptoms of white mould developed in all soybean genotypes. The resistance reaction was characterised by measuring the length of lesions on the main stem at 7 days after inoculation. Of the 67 genotypes evaluated, nine showed greater resistance to S. sclerotiorum, including 17S-01443-L8, 16S-00630-L4, GER_00003, 13S-00001-L2/FPS 2457 RR, BMX Torque I2X, P95Y02 IPRO, 17S-00842-L5, HO Pirapó IPRO and TMG 2359 IPRO. Twenty-three genotypes showed an intermediate response, while 35 genotypes showed greater susceptibility to S. sclerotiorum. Further studies should be conducted under field conditions with the soybean genotypes that showed greater resistance response to S. sclerotiorum under controlled conditions.
期刊介绍：
Journal of Phytopathology publishes original and review articles on all scientific aspects of applied phytopathology in agricultural and horticultural crops. Preference is given to contributions improving our understanding of the biotic and abiotic determinants of plant diseases, including epidemics and damage potential, as a basis for innovative disease management, modelling and forecasting. This includes practical aspects and the development of methods for disease diagnosis as well as infection bioassays.
Studies at the population, organism, physiological, biochemical and molecular genetic level are welcome. The journal scope comprises the pathology and epidemiology of plant diseases caused by microbial pathogens, viruses and nematodes.
Accepted papers should advance our conceptual knowledge of plant diseases, rather than presenting descriptive or screening data unrelated to phytopathological mechanisms or functions. Results from unrepeated experimental conditions or data with no or inappropriate statistical processing will not be considered. Authors are encouraged to look at past issues to ensure adherence to the standards of the journal.
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