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Identification of new sources of resistance to dry root rot caused by Macrophomina phaseolina isolates from India and Myanmar in a mungbean mini-core collection

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Relation http://oar.icrisat.org/11859/
https://doi.org/10.1016/j.cropro.2021.105569
doi:10.1016/j.cropro.2021.105569
 
Title Identification of new sources of resistance to dry root rot caused by Macrophomina phaseolina isolates from India and Myanmar in a mungbean mini-core collection
 
Creator Pandey, A K
Yee, M
Win, M M
Moh Lwin, H M
Adapala, G
Rathore, A
Sheu, Z M
Nair, R M
 
Subject Plant Disease
 
Description Dry root rot (DRR), caused by Macrophomina phaseolina, is a prevalent disease of mungbean in Myanmar, and an
emerging problem in South Asia. The pathogen is a polyphagous necrotroph, survives in the soil for many years
that results disease mitigation difficult. Managing DRR in mungbean through an integrated approach has been
suggested, and the use of resistant varieties is one of the economical methods. The present study aimed to
identify sources of resistance against DRR from a mungbean mini-core collection and to characterize the associated
M. phaseolina isolates from India and Myanmar. Evaluation of the 296 mungbean mini-core accessions
against the isolate MP1 by paper towel method identified 29 accessions with DRR resistance (disease scores: ≤ 3),
and 18 of them with the consistent resistance in the repeated experiment. During the screening of 18 resistant
accessions in the glasshouse, nine accessions were found DRR resistance in repeated sick pot experiments with
≤10% disease incidence. A subset of 30 accessions was selected from the mini-core collection based on their in
vitro DRR reactions. These accessions were evaluated for DRR resistance in the field in Yezin, Myanmar in 2018
and 2019. Out of the 30 accessions, ten accessions were found DRR resistance with ≤10% disease incidence in
both years of evaluations. Pooled analysis of percent disease incidence data of 15 accessions common in both
glasshouse and field revealed the stability of accessions VI001509AG, VI001244AG, and VI001400AG for DRR
resistance across years and locations. The three resistant accessions along with a susceptible check VC693088
were re-evaluated by paper towel method against nine additional M. phaseolina isolates from India (MP3-MP11).
The accessions VI001509AG and VI001400AG were resistant to all nine isolates, while accession VI001244AG
was resistant to MP5, MP6, and MP7 isolates. These accessions could be used in mungbean DRR resistance
breeding programs.
 
Publisher Elsevier Sci
 
Date 2021-05
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11859/1/main.pdf
Pandey, A K and Yee, M and Win, M M and Moh Lwin, H M and Adapala, G and Rathore, A and Sheu, Z M and Nair, R M (2021) Identification of new sources of resistance to dry root rot caused by Macrophomina phaseolina isolates from India and Myanmar in a mungbean mini-core collection. Crop Protection (TSI), 143. pp. 1-12. ISSN 0261-2194