Resistance of tomato genotypes with high level of acylsugars to Tetranychus evansi Baker & Pritchard

Resistance of tomato genotypes with high level of acylsugars to Tetranychus evansi Baker & Pritchard

The Lycopersicon pennellii accession LA716 has been used as a source of arthropod pest resistance in tomato breeding programs due the high contents of acylsugars presents in its leaflets. We investigated the relationship between high foliar acylsugar contents and repellence to spider mite Tetranychus evansi in plants with contrasting acylsugar levels, selected from F2 and BC1F2 (= F2 of the first backcross towards L. esculentum) generations derived from the interespecific cross L. esculentum 'TOM-584' <FONT FACE=Symbol>´</FONT> L. pennellii LA716. Mite resistance was assessed by a repellence test. Plants selected for high levels of acylsugars in leaflets had mite repellence levels similar to that of LA716. The high correlation confirmed the association between high acylsugar levels and mite repellence.

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Bibliographic Details
Main Authors: Resende,Juliano Tadeu Vilela de, Maluf,Wilson Roberto, Cardoso,Maria das Graças, Faria,Marcos Ventura, Gonçalves,Luciano Donizete, Nascimento,Ildon Rodrigues do
Format: Digital revista
Language:English
Published: Escola Superior de Agricultura "Luiz de Queiroz" 2008
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000100005
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Summary:The Lycopersicon pennellii accession LA716 has been used as a source of arthropod pest resistance in tomato breeding programs due the high contents of acylsugars presents in its leaflets. We investigated the relationship between high foliar acylsugar contents and repellence to spider mite Tetranychus evansi in plants with contrasting acylsugar levels, selected from F2 and BC1F2 (= F2 of the first backcross towards L. esculentum) generations derived from the interespecific cross L. esculentum 'TOM-584' <FONT FACE=Symbol>´</FONT> L. pennellii LA716. Mite resistance was assessed by a repellence test. Plants selected for high levels of acylsugars in leaflets had mite repellence levels similar to that of LA716. The high correlation confirmed the association between high acylsugar levels and mite repellence.

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