Potential for soybean rust tolerance among elite soybean lines in Uganda
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Date
2009
Journal Title
Journal ISSN
Volume Title
Publisher
Crop protection
Abstract
Soybean rust, (Phakopsora pachyrhizi), currently the most devastating disease of soybeans worldwide, is
known to challenge single resistance genes deployed against it and therefore, disease tolerance is indisputably
the most viable measure in controlling the pathogen. Studies were conducted at Namulonge in
Central Uganda to assess the level of tolerance to soybean rust among selected elite soybean lines. Seven
elite lines together with three local checks were tested in a split-plot design where some plots were
protected with fungicide to estimate the level of tolerance to soybean rust. The experimentwas conducted
for three cropping seasons beginning second rains of 2005. A rust tolerance index (RTI) was computed for
each test line as the ratio of yield from unprotected plots to yield from protected plots. The study showed
that high levels of tolerance to soybean rust were present in the test lines. The soybean lines that showed
high levels of tolerance included MNG 10.3 and MNG 3.26 all showing RTIs higher than 0.93. These lines
also out-yielded the local checks by about 400 kg ha 1 and are recommended for multi-location testing.
Description
Keywords
Lines, Rust tolerance index, Resistance, Phakopsora pachyrhizi, Yield
Citation
Oloka, H. K., Tukamuhabwa, P., Sengooba, T., Adipala, E., & Kabayi, P. (2009). Potential for soybean rust tolerance among elite soybean lines in Uganda. Crop protection, 28(12), 1076-1080. doi:10.1016/j.cropro.2009.08.008