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Genetic regulation of diapause and associated traits in Chilo partellus (Swinhoe)

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Relation http://oar.icrisat.org/11377/
https://doi.org/10.1038/s41598-020-58640-0
doi:10.1038/s41598-020-58640-0
 
Title Genetic regulation of diapause and associated traits in Chilo partellus (Swinhoe)
 
Creator Dhillon, M K
Hasan, F
Tanwar, A K
Jaba, J
Singh, N
Sharma, H C
 
Subject Entomology
 
Description Diapause is an endocrine controlled arrested metabolic state to delay development or reproduction
under unfavorable conditions. To gain an understanding of importance of diapause for ecological
adaptation, it is important to study regulation of diapause in insects. We examined genetics of
diapause in Chilo partellus by crossing the hibernating (HD), aestivating (AD), post-hibernating (PHD),
post-aestivating (PAD), and nondiapause (ND) strains. Reciprocal crosses were also made to gain
full understanding of diapause regulation and the maternal effects, if any. Data were recorded on
fecundity, egg hatching, larval survival, diapause induction and termination, adult emergence, and
morphometrics of larvae, pupae and adults in the parents (P1, P2), F1 hybrids, and the reciprocal crosses.
Genetic analysis showed that AD strain is general combiner, which also improved egg hatching, larval
survival, diapause termination, adult emergence and proportion of females in the progenies. Incidence
of diapause was highest in HD × AD, whereas termination was greatest in PHD × AD. However, ND
strain and its reciprocal crosses with other strains did not exhibit any noticeable developmental
response associated with diapause. Specific combining ability analysis suggested that where PHD and
AD strains exist together there will be likely reduction in diapause incidence, increased survival with
greater fitness and faster multiplication of their progenies resulting in outbreak of C. partellus. Degree
of dominance estimates revealed that diapause, developmental and morphometric traits in C. partellus
are governed by over dominance gene effects, and mainly depend on parental diapause history.
 
Publisher Nature Research
 
Date 2020-02
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11377/1/sorghum%20stem%20borer%20genetics%20of%20daipuse%20IARI%20ICRISAT.pdf
Dhillon, M K and Hasan, F and Tanwar, A K and Jaba, J and Singh, N and Sharma, H C (2020) Genetic regulation of diapause and associated traits in Chilo partellus (Swinhoe). Scientific Reports (TSI), 10 (1). pp. 1-11. ISSN 2045-2322