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In Vitro Selection of Imazethapyr-Tolerant Tomato (Lycopersicon esculentum Mill.)

Published online by Cambridge University Press:  12 June 2017

Susan E. Iler ,
Clarence J. Swanton  and
K. Peter Pauls
Susan E. Iler
Affiliation:
Dep. Crop Sci., Univ. Guelph, Guelph, Ontario, Canada N1G 2W1
Clarence J. Swanton
Affiliation:
Dep. Crop Sci., Univ. Guelph, Guelph, Ontario, Canada N1G 2W1
K. Peter Pauls
Affiliation:
Dep. Crop Sci., Univ. Guelph, Guelph, Ontario, Canada N1G 2W1
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Abstract

Effectiveness of cyclical in vitro selection for imazethapyr tolerance in tomato was studied. Cotyledons and leaf explants from shoots regenerated on media containing imazethapyr were used to initiate three successive cycles of selection. Increases in tissue viability, callus initiation, and callus proliferation were observed following three cycles of selection on 10−7 M imazethapyr. Dry matter accumulation of unselected tomato seedlings was reduced by 50% when imazethapyr was applied postemergence at a rate of 28 g ae ha−1. Progeny of eight tomato lines selected after one cycle of selection had greater tolerance to imazethapyr than control plants (60 to 70% dry matter accumulation versus 50%, respectively). Variability was also generated for imazethapyr tolerance among progeny of the same tomato line.

Keywords

Imazethapyr, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidtomato, Lycopersicon esculentum Mill. ‘Heinz H722’Imidazolinonesomaclonal variationSolanum ptycanthum#3 SOLPT
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 41 , Issue 1 , March 1993 , pp. 12 - 17
Copyright
Copyright © 1993 by the Weed Science Society of America 

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