Genetic Variation and Genotype by Environment Interaction for Heat Tolerance in Crisphead Lettuce

Lettuce (Lactuca sativa L.) is a cool season crop that is vulnerable to high temperature stress, which promotes bolting and decreases yield and quality. It is anticipated that climate change may lead to higher temperatures in current lettuce growing areas in the United States, thereby negatively aff...

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Main Authors: Abbas Lafta, Germán Sandoya, Beiquan Mou
Format: Article
Language:English
Published: American Society for Horticultural Science (ASHS) 2020-12-01
Series:HortScience
Subjects:
Online Access:https://journals.ashs.org/hortsci/view/journals/hortsci/56/2/article-p126.xml
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author Abbas Lafta
Germán Sandoya
Beiquan Mou
author_facet Abbas Lafta
Germán Sandoya
Beiquan Mou
author_sort Abbas Lafta
collection DOAJ
description Lettuce (Lactuca sativa L.) is a cool season crop that is vulnerable to high temperature stress, which promotes bolting and decreases yield and quality. It is anticipated that climate change may lead to higher temperatures in current lettuce growing areas in the United States, thereby negatively affecting lettuce production and possibly resulting in adverse impacts on global food production. Therefore, it is important to identify lettuce germplasm with tolerance to temperatures higher than those that have occurred over the past century. We evaluated 25 crisphead lettuce cultivars for tolerance to high temperature stress in the San Joaquin, Imperial, and Salinas Valleys, CA. Genetic variation was identified for yield and horticultural traits, such as core length, head diameter, tipburn, bolting, and market maturity, of crisphead lettuce grown in warmer conditions. Significant genotype × environment interaction did not account for most of the variation; the main differences were found for environments and only a small proportion of the variation was due to genotypes. Cultivar Primetime is a good source of heat tolerance for crisphead lettuce, as it presented the best yield and exhibited other desirable characteristics across warmer conditions. These results provide insight into the cultivars that respond well to hot environments. Moreover, the data can be used by breeders to develop new heat-tolerant lettuce cultivars.
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spelling doaj.art-e2c4881e480c46d19efeda617d0bbfe22022-12-21T22:25:06ZengAmerican Society for Horticultural Science (ASHS)HortScience2327-98342020-12-01562126135https://doi.org/10.21273/HORTSCI15209-20Genetic Variation and Genotype by Environment Interaction for Heat Tolerance in Crisphead LettuceAbbas LaftaGermán SandoyaBeiquan MouLettuce (Lactuca sativa L.) is a cool season crop that is vulnerable to high temperature stress, which promotes bolting and decreases yield and quality. It is anticipated that climate change may lead to higher temperatures in current lettuce growing areas in the United States, thereby negatively affecting lettuce production and possibly resulting in adverse impacts on global food production. Therefore, it is important to identify lettuce germplasm with tolerance to temperatures higher than those that have occurred over the past century. We evaluated 25 crisphead lettuce cultivars for tolerance to high temperature stress in the San Joaquin, Imperial, and Salinas Valleys, CA. Genetic variation was identified for yield and horticultural traits, such as core length, head diameter, tipburn, bolting, and market maturity, of crisphead lettuce grown in warmer conditions. Significant genotype × environment interaction did not account for most of the variation; the main differences were found for environments and only a small proportion of the variation was due to genotypes. Cultivar Primetime is a good source of heat tolerance for crisphead lettuce, as it presented the best yield and exhibited other desirable characteristics across warmer conditions. These results provide insight into the cultivars that respond well to hot environments. Moreover, the data can be used by breeders to develop new heat-tolerant lettuce cultivars.https://journals.ashs.org/hortsci/view/journals/hortsci/56/2/article-p126.xmlboltinggge biplotheat stresslactuca sativatipburn
spellingShingle Abbas Lafta
Germán Sandoya
Beiquan Mou
Genetic Variation and Genotype by Environment Interaction for Heat Tolerance in Crisphead Lettuce
HortScience
bolting
gge biplot
heat stress
lactuca sativa
tipburn
title Genetic Variation and Genotype by Environment Interaction for Heat Tolerance in Crisphead Lettuce
title_full Genetic Variation and Genotype by Environment Interaction for Heat Tolerance in Crisphead Lettuce
title_fullStr Genetic Variation and Genotype by Environment Interaction for Heat Tolerance in Crisphead Lettuce
title_full_unstemmed Genetic Variation and Genotype by Environment Interaction for Heat Tolerance in Crisphead Lettuce
title_short Genetic Variation and Genotype by Environment Interaction for Heat Tolerance in Crisphead Lettuce
title_sort genetic variation and genotype by environment interaction for heat tolerance in crisphead lettuce
topic bolting
gge biplot
heat stress
lactuca sativa
tipburn
url https://journals.ashs.org/hortsci/view/journals/hortsci/56/2/article-p126.xml
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AT germansandoya geneticvariationandgenotypebyenvironmentinteractionforheattoleranceincrispheadlettuce
AT beiquanmou geneticvariationandgenotypebyenvironmentinteractionforheattoleranceincrispheadlettuce