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Trichome and biochemical basis of resistance against Tuta absoluta in tomato genotypes

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Title Trichome and biochemical basis of resistance against Tuta absoluta in tomato genotypes
Not Available
 
Creator Vaddi Sridhar
Avverahally Thammanna Sadashiva
Vala Keshava Rao
Padavala Swathi
Hanamant Shivalingappa Gadad
 
Subject breeding
choice bioassay
glandular trichomes
larval mortality
 
Description Not Available
South American tomato moth, Tuta absoluta, a serious pest of tomato (Solanumlycopersicum) in tropics
and subtropics, is rapidly spreading world over. Twenty one wild/cultivated/advanced breeding lines of tomato were screened for resistance to T. absoluta under greenhouse conditions (choice bioassay) and promising genotypes were evaluated further for their antibiosis activity through no choice bioassay under in-vitro conditions. From 21 genotypes screened, six wild accessions viz., S. pennellii (LA 1940); S. chilense (LA 1963); S. arcanum(LA 2157); S. lycopersicum (LA1257) and S. corneliomulleri (LA 1292, LA1274) were relatively resistant to T. absoluta based on mean percent damage and were further studied under in-vitro conditions. These genotypes recorded relatively more larval mortality, prolonged larval and pupal duration with reduced adult emergence of T. absoluta. Among these six genotypes, S. pennellii (LA-1940) showed resistance both under choice and no choice bioassays with higher number of type IV trichomes, highest total flavonoids and phenols. In general, glandular trichomes (GTs) (type I, IV, VII) showed negative correlation in different
genotypes of tomato with reference to larval number/plant, percent damage and adult activity, whereas type V (non-GTs) showed negative correlation with number of larvae/plant.
Not Available
 
Date 2019-04-24T08:06:59Z
2019-04-24T08:06:59Z
2019
 
Type Research Paper
 
Identifier Not Available
1479-2621
http://krishi.icar.gov.in/jspui/handle/123456789/18825
 
Language English
 
Relation Not Available;
 
Publisher NIAB