Abstract
Dectes texanus larvae girdles the stems of soybean and cultivated sunflowers causing significant yield losses in North America. The soybean Plant Introduction (PI) 165673 exhibits antibiosis resistance to the larval stage. The objectives of this study were: (1) to determine the inheritance of D. texanus resistance in PI165673; (2) evaluate PI165673 antibiosis resistance before 21 d post infestation; (3) evaluate girdling damage in PI16563 at the end of the season. K07-1544/PI165673 F2 and F2:3 populations were tested for resistance to D. texanus in 2011 and 2012, and PI165673 antibiosis resistance and girdling damage were evaluated in 2014. Segregation for resistance to D. texanus and heritability estimates in the F2 and F2:3 populations indicated that resistance was controlled by two genes with dominant and recessive epistasis. Antibiosis evaluations indicated: (1) PI165673 contained lower number of larvae and eggs relative to the number of oviposition punctures at 15 d post infestation; (2) the proportion of first-instar larvae was higher in PI165673 at 15 d post infestation; (3) larvae reach the sixth-instar stage in PI165673. None of the PI165673 plants were girdled at the end of the season. Identification of additional sources of D. texanus resistance is required to impair larval development in the stem.
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Claims 6
Claim · model-written summary
Resistance was controlled by two genes with dominant and recessive epistasis.
- Taxon
- soybean
Glycine maxt0 - Material
- PI165673t0
- Interactor
- Dectes texanus
Dectes texanust0pest - Outcome
- resistancee0
- Value
- two genese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resistance was controlled by two genes with dominant and recessive epistasis”
t0“Dectes Stem Borer, Dectes texanus, in Soybean PI165673”
Claim · model-written summary
PI165673 had fewer larvae and eggs relative to oviposition punctures at 15 days.
- Taxon
- soybeanGlycine maxt0
- Material
- PI165673e0
- Interactor
- Dectes texanusDectes texanust0pest
- Outcome
- number of larvae and eggse0
- Direction
- lowere0
- Qualifier
- 15 d post infestatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PI165673 contained lower number of larvae and eggs relative to the number of oviposition punctures at 15 d post infestation”
t0“Dectes Stem Borer, Dectes texanus, in Soybean PI165673”
Claim · model-written summary
The proportion of first-instar larvae was higher in PI165673 at 15 days.
- Taxon
- soybeanGlycine maxt0
- Material
- PI165673e0
- Interactor
- Dectes texanusDectes texanust0pest
- Outcome
- proportion of first-instar larvaee0
- Direction
- highere0
- Qualifier
- 15 d post infestatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the proportion of first-instar larvae was higher in PI165673 at 15 d post infestation”
t0“Dectes Stem Borer, Dectes texanus, in Soybean PI165673”
Claim · model-written summary
Larvae reached the sixth instar in PI165673.
- Taxon
- soybeanGlycine maxt0
- Material
- PI165673e0
- Interactor
- Dectes texanusDectes texanust0pest
- Outcome
- larvae reach the sixth-instar stagee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larvae reach the sixth-instar stage in PI165673”
t0“Dectes Stem Borer, Dectes texanus, in Soybean PI165673”
Claim · model-written summary
No PI165673 plants were girdled by season end.
- Taxon
- soybeanGlycine maxt0
- Material
- PI165673e0
- Interactor
- Dectes texanusDectes texanust0pest
- Outcome
- None of the PI165673 plants were girdlede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“None of the PI165673 plants were girdled at the end of the season”
t0“Dectes Stem Borer, Dectes texanus, in Soybean PI165673”
Claim · model-written summary
The authors recommend finding additional resistance sources to impair larval development.
- Taxon
- soybeanGlycine maxt0
- Interactor
- D. texanusDectes texanuse0pest
- Outcome
- Identification of additional sources of D. texanus resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Identification of additional sources of D. texanus resistance is required to impair larval development in the stem”
t0“Dectes Stem Borer, Dectes texanus, in Soybean PI165673”