Influence of environment on soybean [Glycine max (L.) Merr.] resistance to groundnut leaf miner, Aproaerema modicella (Deventer) in Uganda
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Date
2018
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Plant Breeding and Crop Science
Abstract
Groundnut leaf miner (GLM) [Aproaerema modicella (Deventer)] is a serious problem for soybean
cultivation in Uganda causing yield losses of up to 100%. The use of soybean [Glycine max (L.) Merr.]
cultivars resistant to GLM attack is an important strategy in the integrated pest management program.
The aim of this study was to determine the environment × genotype interaction influence on the
soybean resistance traits to GLM attack. Eighteen soybean genotypes were evaluated for resistance to
GLM attack. The experiment was set up using randomized complete block design replicated three times
under natural pest infestation in Budaka (Eastern) and Arua (Northern) districts in Uganda. Data were
subjected to analysis of variance, Pearson’s phenotypic correlation and cluster analysis. Highly
significant (p < 0.001) differences among the genotypes were recorded for all the studied traits, except
the number of pupae per plant which was significant (p < 0.05). GLM incidence and severity had
significant negative correlations with rainfall and relative humidity. However, there were significant
positive correlations between minimum temperature and GLM incidence as well as severity for most of
the genotypes. Soybean genotypes VI046160 and VI046167 could be used as parents in breeding for
resistance to GLM pest. Areas with high rainfall and humidity would be recommended for soybean
production to minimize infestation by GLM.
Description
Keywords
Grain yield, Gelechiidae, Incidence, Lepidoptera, Natural infestation, Severity, Weather parameters.
Citation
Ibanda, AP, Karungi, J., Malinga, GM, Tanzito, GA, Ocan, D., Badji, A., ... & Rubaihayo, P. (2018). Influence of environment on soybean [Glycine max (L.) Merr.] resistance to groundnut leaf miner, Aproaerema modicella (Deventer) in Uganda. Journal of Plant Breeding and Crop Science , 10 (12), 336-346. DOI: 10.5897/JPBCS2018.0764