Evaluation of mungbean genotypes with tolerance to pre-emergence waterlogging

Issue Date

6-2017

Abstract

Mungbean productivity under rice-based cropping system is greatly affected when unexpected flooding occurs during the critical growth stage of the crop. This is due to poor soil drainage of most lowland rice areas. One of the growth phases in mungbean where it is most susceptible to flooding damage is immediately after planting or at the pre-emergence stage. Development of waterlogging-tolerant varieties will help reduce damange and increase productivity caused by unseasonal heavy rains during this critical period. Therefore, this study was conducted to screen mungbean genotypes with resistance to pre-emergence waterlogging. A total of 403 mungbean accessions from the National Plant Genetic Resources Laboratory were screened for pre-emergence waterlogging tolerance wherein experiments were set-up by batch with Pag-asa 19 and Pag-asa 21 varieties as the control. Seeds were submerged in distilled water to at least thrice the volume of the seeds for 3 days. There after, seeds were planted in seedling trays with 1.1 garden soil and coir dust. Seedling emergence was taken on both the control and treated seeds after 5 days. Deformed seedlings and root appearance were noted as well. Entries were subjected to confirmatory screening to verify their performance under pre-emergence, waterlogging conditions. Top accessions from this screening were identified and this include: PHL4326, PHL7064, PHL12636, PHL12834, PHL12847, PHL12893, PHL14295, PHL14296, PHL15163, PHL15200, PHL15243, PHL15330, and M90-3-3. Results clearly indicated genotypic variability among mungbean accessions for pre-germination waterlogging tolerance. These accessions will undergo another series of screening, i.e. more parameters and longer days of screening and thereafter will be used as parents to improve mungbean productivity.

Source or Periodical Title

Philippine Journal of Crop Science

ISSN

0115-463X

Volume

42

Issue

Supplement no. 1

Page

102

Document Type

Article

College

College of Agriculture and Food Science (CAFS)

Language

English

Subject

Mung bean; Waterlogging (Soils)

En – AGROVOC descriptors

VIGNA RADIATA RADIATA; MUNG BEANS; VARIETIES; GENOTYPES; SELECTION; WATERLOGGING; WATER TOLERANCE

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