Abstract
Asian soybean rust caused by the fungal pathogen Phakopsora pachyrhizi is the most devastating disease of soybean. The host cultivar specificity of the pathogen shows considerable differentiation depending on the area and season of its emergence. Although resistance genes for P. pachyrhizi (Rpp) have been reported in several soybean varieties, the genetic background of these varieties is highly differentiated. Furthermore, some of the varieties harbor unknown genetic factors in addition to Rpp that could influence resistance reactions against the pathogen. In order to gain a comprehensive understanding of Rpp-P. pachyrhizi interactions, homogenous plant material harboring Rpp genes is necessary. In this study, we bred Rpp-near isogenic lines (Rpp-NILs), which retained identical plant characters originating from a single genetic background, and accordingly showed low-variant compatible/incompatible reactions against the pathogen. These Rpp-NILs can be used as genetic resources for studying P. pachyrhizi epidemiology and elucidating resistance mechanisms. Compatible/incompatible relationships between the soybean rust resistance gene Rpp and isolates of the pathogen P. pachyrhizi are clearly distinguishable using the Rpp-NILs bred in this study.
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Claims 3
Claim · model-written summary
Rpp near-isogenic lines retained identical plant characters from one genetic background.
- Taxon
- soybean
Glycine maxt0 - Material
- Rpp-near isogenic lines (Rpp-NILs)e0
- Gene
- Rppe0
- Outcome
- identical plant characterse0
- Comparator
- a single genetic backgrounde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we bred Rpp-near isogenic lines (Rpp-NILs), which retained identical plant characters originating from a single genetic background”
t0“Near-isogenic soybean lines”
Claim · model-written summary
The Rpp near-isogenic lines showed low variation in compatibility reactions to the pathogen.
- Taxon
- soybeanGlycine maxt0
- Material
- Rpp-NILse2
- Interactor
- Phakopsora pachyrhiziPhakopsora pachyrhizie1pathogen
- Outcome
- compatible/incompatible reactionse0
- Value
- low-variante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“showed low-variant compatible/incompatible reactions against the pathogen”
e1“fungal pathogen Phakopsora pachyrhizi”
e2“Rpp-near isogenic lines (Rpp-NILs)”
t0“Near-isogenic soybean lines”
Claim · model-written summary
The Rpp near-isogenic lines clearly distinguished compatible from incompatible relationships with pathogen isolates.
- Taxon
- soybeanGlycine maxe0
- Material
- Rpp-NILse0
- Interactor
- P. pachyrhiziPhakopsora pachyrhizie0pathogen
- Gene
- Rppe0
- Outcome
- Compatible/incompatible relationshipse0
- Comparator
- isolates of the pathogen P. pachyrhizie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compatible/incompatible relationships between the soybean rust resistance gene Rpp and isolates of the pathogen P. pachyrhizi are clearly distinguishable using the Rpp-NILs bred in this study.”