Abstract
Major quantitative disease resistance loci (QDRLs) are rare in the Phytophthora sojae (Kaufmann and Gerdemann)–soybean [ Glycine max (L). Merr.] pathosystem. A major QDRL on chromosome 18 (QDRL‐18) was identified in PI 427105B and PI 427106. QDRL‐18 represents a valuable resistance source for breeding programs. Thus, our objectives were to determine its isolate specificity and measure its effect on yield and resistance to both P. sojae and other soybean pathogens. We characterized near isogenic lines (NILs) developed from F 7 recombinant inbred lines heterozygous at QDRL‐18; NILs represent introgressions from PI 427105B, PI 427106, and susceptible ‘OX20‐8’. The introgressions from PI 427105B and PI 427106 increased resistance to P. sojae by 11 to 20% and 35 to 40%, respectively, based on laboratory and greenhouse assays, and increased yield by 13 to 29% under disease conditions. The resistant introgression from PI 427105B was also effective against seven P. sojae isolates with no isolate specificity detected. Based on quantitative polymerase chain reaction assays, NILs with the susceptible introgression had significantly higher relative levels of P. sojae colonization 48 h after inoculation. No pleiotropic effects for resistance to either soybean cyst nematode or Fusarium graminearum were detected. This information improves soybean breeders’ ability to make informed decisions regarding the deployment of QDRL‐18 in their respective breeding programs.
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Claims 7
Claim · model-written summary
PI 427105B introgression increased resistance to P. sojae by 11 to 20%.
- Taxon
- soybean
Glycine maxe1 - Material
- PI 427105Be0
- Treatment
- introgressions from PI 427105Be0
- Interactor
- P. sojaePhytophthora sojaee0pathogen
- Outcome
- resistance to P. sojaee0
- Direction
- increasede0
- Value
- 11 to 20%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The introgressions from PI 427105B and PI 427106 increased resistance to P. sojae by 11 to 20% and 35 to 40%, respectively”
e1“soybean [ Glycine max (L). Merr.]”
Claim · model-written summary
PI 427106 introgression increased resistance to P. sojae by 35 to 40%.
- Taxon
- soybeanGlycine maxe1
- Material
- PI 427106e0
- Treatment
- introgressions from PI 427105B and PI 427106e0
- Interactor
- P. sojaePhytophthora sojaee0pathogen
- Outcome
- resistance to P. sojaee0
- Direction
- increasede0
- Value
- 35 to 40%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The introgressions from PI 427105B and PI 427106 increased resistance to P. sojae by 11 to 20% and 35 to 40%, respectively”
e1“soybean [ Glycine max (L). Merr.]”
Claim · model-written summary
Resistant introgressions increased soybean yield by 13 to 29% under disease conditions.
- Taxon
- soybeanGlycine maxe1
- Treatment
- introgressions from PI 427105B and PI 427106e2
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 13 to 29%e0
- Qualifier
- under disease conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased yield by 13 to 29% under disease conditions”
e1“soybean [ Glycine max (L). Merr.]”
e2“The introgressions from PI 427105B and PI 427106”
Claim · model-written summary
PI 427105B introgression resisted seven P. sojae isolates without detected isolate specificity.
- Taxon
- soybeanGlycine maxe1
- Material
- PI 427105Be0
- Interactor
- P. sojaePhytophthora sojaee0pathogen
- Outcome
- effective against seven P. sojae isolatese0
- Value
- seven P. sojae isolatese0
- Qualifier
- no isolate specificity detectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The resistant introgression from PI 427105B was also effective against seven P. sojae isolates with no isolate specificity detected.”
e1“soybean [ Glycine max (L). Merr.]”
Claim · model-written summary
Susceptible introgression lines had higher P. sojae colonization at 48 hours after inoculation.
- Taxon
- soybeanGlycine maxe1
- Material
- NILs with the susceptible introgressione0
- Interactor
- P. sojaePhytophthora sojaee0pathogen
- Outcome
- P. sojae colonizatione0
- Direction
- highere0
- Qualifier
- 48 h after inoculatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NILs with the susceptible introgression had significantly higher relative levels of P. sojae colonization 48 h after inoculation.”
e1“soybean [ Glycine max (L). Merr.]”
Claim · model-written summary
No pleiotropic resistance effect was detected for soybean cyst nematode.
- Taxon
- soybeanGlycine maxe0
- Interactor
- soybean cyst nematode
Heterodera glycinese0pathogen - Outcome
- resistance to either soybean cyst nematodee0
- Direction
- No pleiotropic effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No pleiotropic effects for resistance to either soybean cyst nematode or Fusarium graminearum were detected.”
Claim · model-written summary
No pleiotropic resistance effect was detected for Fusarium graminearum.
- Taxon
- soybeanGlycine maxe1
- Interactor
- Fusarium graminearum
_on_Corn_(Zea_mays)_at_Waimea%2C_Hawaii.jpg?width=60)
Fusarium graminearume0pathogen - Outcome
- resistance to either soybean cyst nematode or Fusarium graminearume0
- Direction
- No pleiotropic effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_on_Corn_(Zea_mays)_at_Waimea%2C_Hawaii.jpg?width=500)
Verbatim
e0“No pleiotropic effects for resistance to either soybean cyst nematode or Fusarium graminearum were detected.”
e1“soybean [ Glycine max (L). Merr.]”
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See all 22 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.