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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Broad-spectrum arthropod resistance in hybrids between high-and low-acylsugar tomato lines
Crop Science, Volume 50, No. 2, Year 2010
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Description
Three elite tomato (Solanum lycopersicum L., syn. Lycopersicon esculentum Mill.) breeding lines (TOM-687, TOM-688, TOM-689) with high foliar acylsugar (AS) contents were obtained, and used along with two low-AS lines (TOM-690, TOM-684) in hybrid combinations, to obtain six hybrids between one low-AS line × one high- AS line (= hybrids with intermediate AS levels), one hybrid between two high-AS lines (= high- AS hybrid), and one hybrid between two low- AS lines (= low-AS hybrid). These genotypes were tested for resistance to three different tomato pests (spider mites [Tetranychus urticae Koch], silverleaf whitefly [Bemisia argentifolii Bellows & Perring], and the South American tomato pinworm [Tuta absoluta (Meyrick)]) along with hybrid TEX-154 (low-AS) and/or Solanum pennellii Correll 'LA-716' (high-AS wild accession). In all three instances, high-AS genotypes showed higher levels of pest resistance than low-AS genotypes. Hybrids with intermediate AS levels showed resistances that were just as high as those of high-AS genotypes for Bemisia argentifolii and Tuta absoluta, and nearly as good as those for Tetranychus urticae. Acylsugars were confirmed as being a major component of the high levels of pest resistances found in S. pennellii-a component that was successfully introgressed into elite tomato breeding lines. Acylsugar-mediated pest resistance is effective against a broad spectrum of tomato pests. Because high-AS breeding lines are scarce, the deployment of hybrids between high-AS line × low-AS line would be a quick, viable alternative to obtain commercial pest-resistant hybrids. © Crop Science Society of America.
Authors & Co-Authors
Maluf, Wilson Roberto
Brazil, Lavras
Universidade Federal de Lavras
Maciel, Gabriel Mascarenhas
Brazil, Lavras
Universidade Federal de Lavras
Gomes, Luiz Antonio Augusto
Brazil, Lavras
Universidade Federal de Lavras
Cardoso, Maria das Graças
Brazil, Lavras
Universidade Federal de Lavras
Gonçalves, Luciano Donizete
Brazil, Belo Horizonte
Empresa de Pesquisa Agropecuária de Minas Gerais
da Silva, Ernani Clarete
Brazil, Alfenas
Unifenas Universidade Jose do Rosario Vellano
Knapp, Markus M.
Kenya, Nairobi
International Centre of Insect Physiology and Ecology Nairobi
Statistics
Citations: 72
Authors: 7
Affiliations: 4
Identifiers
Doi:
10.2135/cropsci2009.01.0045
ISSN:
0011183X