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Partial Loss of Inheritable Type I Resistance of Codling Moth to Cydia pomonella granulovirus.
- Source :
-
Viruses (1999-4915) . Jun2019, Vol. 11 Issue 6, p570. 1p. - Publication Year :
- 2019
-
Abstract
- Current knowledge of the field resistance of codling moth (CM, Cydia pomonella, L) against Cydia pomonella granulovirus (CpGV) is based mainly on the interaction between the Mexican isolate CpGV-M and CpRR1, a genetically homogeneous CM inbreed line carrying type I resistance. The resistance level of laboratory-reared CpRR1 to CpGV-M was recently found to have decreased considerably, compared to the initially high resistance. To understand the background of this phenomenon, CpRR1 larvae were exposed over several generations to CpGV-M for re-selection of the original resistance level. After five and seven generations of selection, new CpRR1_F5 and CpRR1_F7 lines were established. The resistance ratio of these selected lines was determined by full range bioassays. The CpRR1_F5 strain regained a higher level of resistance against CpGV up to 104-fold based on LC50 values compared to susceptible larvae (CpS), which indicated that the absence of virus selection had resulted in a reduction of resistance under laboratory rearing conditions. In addition, some fitness costs of fecundity were observed in CpRR1_F5. Single-pair crossings between CpRR1_F5 or CpRR1_F7 with susceptible CpS moths revealed a dominant but not fully sex-linked inheritance, which suggests a partial loss of previous resistance traits in CpRR1. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CODLING moth
*FERTILITY
*LARVAE
*MOTHS
*BIOLOGICAL assay
*BACULOVIRUSES
Subjects
Details
- Language :
- English
- ISSN :
- 19994915
- Volume :
- 11
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Viruses (1999-4915)
- Publication Type :
- Academic Journal
- Accession number :
- 137186567
- Full Text :
- https://doi.org/10.3390/v11060570