Identification of New Source of Resistance to Powdery Mildew of Indian Mustard and Studying Its Inheritance
| Autor: | Ajay Kumar Thakur, J Radhamani, M. L. Meena, C. Manjunatha, Rishi K. Tyagi, Devender Kumar Yadava, J. Nanjundan, Rashmi Yadav, Arun Kumar, Dhiraj Singh |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Veterinary medicine Mildew biology Indian mustard Erysiphe cruciferarum Brassica food and beverages lcsh:Plant culture biology.organism_classification 01 natural sciences Genetic analysis resistance 010602 entomology New disease Backcrossing inheritance lcsh:SB1-1110 powdery mildew Cultivar Agronomy and Crop Science Powdery mildew 010606 plant biology & botany Research Article |
| Zdroj: | The Plant Pathology Journal The Plant Pathology Journal, Vol 36, Iss 2, Pp 111-120 (2020) |
| ISSN: | 2093-9280 1598-2254 |
| Popis: | Powdery mildew of Indian mustard (Brassica juncea), caused by Erysiphe cruciferarum, is emerging as ma- jor problem in India. All the Indian mustard cultivars presently grown in India are highly susceptible to pow- dery mildew and so far no resistance source has been reported. In this study, with an aim to identify resistant source, 1,020 Indian mustard accessions were evaluated against E. cruciferarum PMN isolate, at Wellington, The Nilgiris, Tamil Nadu, India under natural hot spot conditions. The study identified one accession (RDV 29) with complete resistance against E. cruciferarum PMN isolate for the first time, which was consistent in five independent evaluations. Genetic analysis of F1, F2 and backcross populations obtained from the cross RSEJ 775 (highly susceptible) × RDV 29 (highly resistant) for two season revealed that the resistance is governed by two genes with semi-dominant and gene dosage effect. Further, a new disease rating system using six scales (0, 1, 2, 3, 4, and 5) has also been proposed in this study to score powdery mildew based on progress of fungal growth in different plant parts of the F2 population. The outcome of this study viz. newly identified powdery mildew-resistant Indian mustard accession (RDV 29), information on inheritance of resistance and the newly developed disease rating scale will provide the base for development of powdery mildew-resistant cultivars of Indian mustard. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|