Detection of Resistant Sources of Soybean against Sclerotium rolfsii in Assam condition

Author: Priyankee Dutta

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Abstract

Among the different production constraints in Soybean, diseases are most serious. These diseases are caused by various pathogens, out of which fungi causes greatest threat in crop production and it reduces the yield of the crop to a greater extent. A study was conducted during kharif (June–Nov.) 2018 and 2019 under net house condition of the Department of Plant Pathology, Assam Agricultural University Jorhat, Assam, India. It aimed to compare the performance of forty genotypes received from AICRP (All India Coordinated Research Project) on Soybean. Diseased soybean seedlings were used as the source of pathogen and it was collected from ICR farm of Assam Agricultural University. Disease reaction of the isolate of Sclerotium rolfsii was tested by blotter paper technique. Percent disease index (PDI) was evaluated in the forty genotypes. It ranged between 70-98. Based on the score HIMSO1688, PS1347, BRAGG, JS335 are found to show moderate resistance against collar rot. 28 genotypes namely PS1637, JS21-71, MACS1566, PS24, RSC11-17, MAUS734, Dsb33, NRC138, JS2171, PS1637, AUKS176, DS3110, MACS1620, MAUS732, KS113, SL958, NRC148, RSC11-15, RVS2011-10, CAUMS1, RVSM201135, VLS97, TS59, RVS2007-4, KDS1073, NRCSL2, KDS1009, BAUS100 showed high susceptibility to the pathogen and 8 genotypes DS3109, NRC146, SL1191, GJS3, NRC139, SL1171, HIMSO1689, JS9305 were found to be susceptible with high PDI. These four moderately resistant genotypes can thus serve as materials for future breeding activities.

Keywords

Soybean, Sclerotium rolfsii, collar rot, resistant, Assam

Conclusion

HIMSO1688, PS1347, BRAGG, JS335 showed comparatively lower PDI for the pathogen Sclerotium rolfsii and thus have some potentiality to develop resistance against it. These genotypes has the potentiality for the control of the collar rot disease in Soybean field and can promote Soybean production in areas like Assam. Breeding works can be carried out to improve these varieties in terms of their yield potential and disease resistance by introducing useful genes which will thereby improve their potentiality to use them in disease management systems of Soybean.

References

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How to cite this article

Priyankee Dutta (2023). Detection of Resistant Sources of Soybean against Sclerotium rolfsii in Assam condition. Biological Forum – An International Journal, 15(7): 101-105.