Field Testing of Tomato Chilling Tolerance under Varying Light and Temperature Conditions

Chilling tolerance is a desirable trait in commercial tomato varieties, in order to extend the growing season and geographic range. Two Nearly Isogenic Lines (NILs) with introgressions in chromosome 2 and 3 of Solanum habrochaites S. Knapp & D.M. Spooner, a cold-resistant wild tomato, were e...

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Autores principales:	Elizondo,Rafael, Oyanedel,Eduardo
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2010
Materias:	Linkage drag NILs
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000400004
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spelling	oai:scielo:S0718-583920100004000042018-10-01Field Testing of Tomato Chilling Tolerance under Varying Light and Temperature ConditionsElizondo,RafaelOyanedel,Eduardo Linkage drag NILs Chilling tolerance is a desirable trait in commercial tomato varieties, in order to extend the growing season and geographic range. Two Nearly Isogenic Lines (NILs) with introgressions in chromosome 2 and 3 of Solanum habrochaites S. Knapp & D.M. Spooner, a cold-resistant wild tomato, were evaluated in the field. Four plantings were established between 21 August and 2 October 2006 (day 232 and 274). Throughout the experiment the heat sum was interpreted using air temperature to calculate growing degree days (base 12 °C) and chilling hours (below 12 °C), with the daily light integral calculated as global solar radiation. The relative post-transplant growth rate, fruit set and yield, were evaluated over two successive 10-d periods. Chilling tolerance is expressed under high radiation and low temperature conditions, which occurred during the 10-d post-transplant evaluation period beginning on day 257, when both NILs achieved a leaf area growth rate 1.7 times higher than the control plants. During the second evaluation period, 10-20 d post-transplant, both NILs grew on average, 1.4 times more than the control. There were no significant differences in earliness or fruit set. These NILs should not be used as a direct source to obtain chilling tolerant varieties, because of the low fruit set, 84% lower in LA3921 than the control, probably due to linkage drag and poor environmental adaptability in both lines.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.70 n.4 20102010-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000400004en10.4067/S0718-58392010000400004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Linkage drag NILs
spellingShingle	Linkage drag NILs Elizondo,Rafael Oyanedel,Eduardo Field Testing of Tomato Chilling Tolerance under Varying Light and Temperature Conditions
description	Chilling tolerance is a desirable trait in commercial tomato varieties, in order to extend the growing season and geographic range. Two Nearly Isogenic Lines (NILs) with introgressions in chromosome 2 and 3 of Solanum habrochaites S. Knapp & D.M. Spooner, a cold-resistant wild tomato, were evaluated in the field. Four plantings were established between 21 August and 2 October 2006 (day 232 and 274). Throughout the experiment the heat sum was interpreted using air temperature to calculate growing degree days (base 12 °C) and chilling hours (below 12 °C), with the daily light integral calculated as global solar radiation. The relative post-transplant growth rate, fruit set and yield, were evaluated over two successive 10-d periods. Chilling tolerance is expressed under high radiation and low temperature conditions, which occurred during the 10-d post-transplant evaluation period beginning on day 257, when both NILs achieved a leaf area growth rate 1.7 times higher than the control plants. During the second evaluation period, 10-20 d post-transplant, both NILs grew on average, 1.4 times more than the control. There were no significant differences in earliness or fruit set. These NILs should not be used as a direct source to obtain chilling tolerant varieties, because of the low fruit set, 84% lower in LA3921 than the control, probably due to linkage drag and poor environmental adaptability in both lines.
author	Elizondo,Rafael Oyanedel,Eduardo
author_facet	Elizondo,Rafael Oyanedel,Eduardo
author_sort	Elizondo,Rafael
title	Field Testing of Tomato Chilling Tolerance under Varying Light and Temperature Conditions
title_short	Field Testing of Tomato Chilling Tolerance under Varying Light and Temperature Conditions
title_full	Field Testing of Tomato Chilling Tolerance under Varying Light and Temperature Conditions
title_fullStr	Field Testing of Tomato Chilling Tolerance under Varying Light and Temperature Conditions
title_full_unstemmed	Field Testing of Tomato Chilling Tolerance under Varying Light and Temperature Conditions
title_sort	field testing of tomato chilling tolerance under varying light and temperature conditions
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000400004
work_keys_str_mv	AT elizondorafael fieldtestingoftomatochillingtoleranceundervaryinglightandtemperatureconditions AT oyanedeleduardo fieldtestingoftomatochillingtoleranceundervaryinglightandtemperatureconditions
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Field Testing of Tomato Chilling Tolerance under Varying Light and Temperature Conditions

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