[HTML][HTML] Resistance to Asian soybean rust in soybean lines with the pyramided three Rpp genes

N Yamanaka, NG Lemos, M Uno… - Crop Breeding and …, 2013 - SciELO Brasil
N Yamanaka, NG Lemos, M Uno, H Akamatsu, Y Yamaoka, RV Abdelnoor, AL Braccini
Crop Breeding and Applied Biotechnology, 2013SciELO Brasil
In this study, the influence of genetic background on the resistance level of a soybean line
carrying Rpp2, Rpp4, and Rpp5 was evaluated by backcrossing it with a susceptible variety.
It was also evaluated eight lines which carry these Rpp genes against five Asian soybean
rust (ASR) isolates, in order to determine the likely range of resistance against ASR isolates
differing in pathogenicity. The results indicated that a high level of resistance against various
ASR isolates could be retained in lines carrying the three Rpp genes in susceptible genetic …
In this study, the influence of genetic background on the resistance level of a soybean line carrying Rpp2, Rpp4, and Rpp5 was evaluated by backcrossing it with a susceptible variety. It was also evaluated eight lines which carry these Rpp genes against five Asian soybean rust (ASR) isolates, in order to determine the likely range of resistance against ASR isolates differing in pathogenicity. The results indicated that a high level of resistance against various ASR isolates could be retained in lines carrying the three Rpp genes in susceptible genetic backgrounds, although minor influences of plant genetic background and ASR pathogenicity to the ASR resistance could occur. Thus, lines with the pyramided three Rpp genes should be effective against a complex pathogen population consisting of diverse Phakopsora pachyrhizi isolates.
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