Inheritance of Antibiosis Resistance to the Dectes Stem Borer, Dectes texanus, in Soybean PI165673

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. tex...

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Bibliographic Details
Published inAgronomy (Basel) Vol. 11; no. 4; p. 738
Main Authors Aguirre-Rojas, Lina M., Buschman, Lawrent L., McCornack, Brian, Schapaugh, William T., Scully, Erin D., Zhu, Kun Yan, Trick, Harold N., Smith, Charles Michael
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.04.2021
Subjects
Agricultural production
Antibiosis
Arthropods
Borers
Cultivars
Damage assessment
Dectes texanus
Developmental stages
Epistasis
Girdles
Girdling
Heredity
Heritability
host–plant resistance
Infestation
inheritance of resistance
Insecticides
Larvae
Larval development
Oviposition
Plant introductions
Plant resistance
Populations
Seeds
soybean
Soybeans
Stems
Summer
Sunflowers
United States > US
Kansas
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Summary: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.
ISSN:2073-4395
2073-4395
DOI:10.3390/agronomy11040738