Heat-tolerant Lettuce Germplasm (Lactuca sativa L.) Identified in Romaine and Butterhead Types for Warmer Plantings
Warmer temperatures during crop production are not desirable for a cool-season crop such as lettuce (Lactuca sativa L.). Lettuce is among the top 10 most consumed vegetables in the United States. Production of this vegetable is concentrated mostly in temperate areas of California, and during the win...
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| Format: | Article |
| Language: | English |
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American Society for Horticultural Science (ASHS)
2024-01-01
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| Series: | HortScience |
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| Online Access: | https://journals.ashs.org/hortsci/view/journals/hortsci/59/2/article-p151.xml |
| _version_ | 1797307121390321664 |
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| author | Germán Sandoya Abbas Lafta Beiquan Mou |
| author_facet | Germán Sandoya Abbas Lafta Beiquan Mou |
| author_sort | Germán Sandoya |
| collection | DOAJ |
| description | Warmer temperatures during crop production are not desirable for a cool-season crop such as lettuce (Lactuca sativa L.). Lettuce is among the top 10 most consumed vegetables in the United States. Production of this vegetable is concentrated mostly in temperate areas of California, and during the wintertime in Arizona and Florida as a result of their mild climatic conditions. Heat-tolerant cultivars are needed for the leafy vegetable industry to continue thriving. However, there is very little information on heat-tolerant germplasms of lettuce that can be used as a source to improve heat tolerance in lettuce. This is particularly important in romaine and butterhead lettuce, which are two morphological types with increasing demand in the market. Therefore, research was conducted to identify germplasm that performs acceptably in warmer regions in the western United States. This investigation also aimed to understand the reaction of varieties to different environments, which could help plant breeders select and evaluate lettuce plants during the breeding process. Twenty-three and 25 accessions of romaine and butterhead lettuce, respectively, were planted in five trials near Holtville, CA, USA: Five Points, CA, USA, under warmer temperatures and Salinas, CA, USA, under cooler temperatures. Romaine genotypes Bambi, Blonde Lente a Monter, Medallion MT, and Red Eye Cos; and butterhead genotypes Butter King and Margarita had no bolting, an acceptable head weight, short cores, and acceptable head height. Head weight and related traits (including core length, height, width, etc.) and heat-related disorders were significantly different across multiple experiments, indicating genetic variation. The major component of the phenotypic variation in these experiments was a result of environmental factors. Therefore, plant breeders may still need to evaluate progeny in multiple trials and multiple locations to select heat-tolerant romaine and butterhead lettuce effectively. |
| first_indexed | 2024-03-08T00:52:43Z |
| format | Article |
| id | doaj.art-42bf11f444e946329411a5339aebffcb |
| institution | Directory Open Access Journal |
| issn | 2327-9834 |
| language | English |
| last_indexed | 2024-03-08T00:52:43Z |
| publishDate | 2024-01-01 |
| publisher | American Society for Horticultural Science (ASHS) |
| record_format | Article |
| series | HortScience |
| spelling | doaj.art-42bf11f444e946329411a5339aebffcb2024-02-14T18:21:29ZengAmerican Society for Horticultural Science (ASHS)HortScience2327-98342024-01-01592https://doi.org/10.21273/HORTSCI17368-23Heat-tolerant Lettuce Germplasm (Lactuca sativa L.) Identified in Romaine and Butterhead Types for Warmer PlantingsGermán Sandoya0Abbas Lafta1Beiquan Mou2Everglades Research and Education Center, Horticultural Sciences Department, University of Florida IFASDepartment of Plant Pathology, North Dakota State UniversityUS Department of Agriculture, Agricultural Research ServiceWarmer temperatures during crop production are not desirable for a cool-season crop such as lettuce (Lactuca sativa L.). Lettuce is among the top 10 most consumed vegetables in the United States. Production of this vegetable is concentrated mostly in temperate areas of California, and during the wintertime in Arizona and Florida as a result of their mild climatic conditions. Heat-tolerant cultivars are needed for the leafy vegetable industry to continue thriving. However, there is very little information on heat-tolerant germplasms of lettuce that can be used as a source to improve heat tolerance in lettuce. This is particularly important in romaine and butterhead lettuce, which are two morphological types with increasing demand in the market. Therefore, research was conducted to identify germplasm that performs acceptably in warmer regions in the western United States. This investigation also aimed to understand the reaction of varieties to different environments, which could help plant breeders select and evaluate lettuce plants during the breeding process. Twenty-three and 25 accessions of romaine and butterhead lettuce, respectively, were planted in five trials near Holtville, CA, USA: Five Points, CA, USA, under warmer temperatures and Salinas, CA, USA, under cooler temperatures. Romaine genotypes Bambi, Blonde Lente a Monter, Medallion MT, and Red Eye Cos; and butterhead genotypes Butter King and Margarita had no bolting, an acceptable head weight, short cores, and acceptable head height. Head weight and related traits (including core length, height, width, etc.) and heat-related disorders were significantly different across multiple experiments, indicating genetic variation. The major component of the phenotypic variation in these experiments was a result of environmental factors. Therefore, plant breeders may still need to evaluate progeny in multiple trials and multiple locations to select heat-tolerant romaine and butterhead lettuce effectively.https://journals.ashs.org/hortsci/view/journals/hortsci/59/2/article-p151.xmlboltingheat stresstipburn |
| spellingShingle | Germán Sandoya Abbas Lafta Beiquan Mou Heat-tolerant Lettuce Germplasm (Lactuca sativa L.) Identified in Romaine and Butterhead Types for Warmer Plantings HortScience bolting heat stress tipburn |
| title | Heat-tolerant Lettuce Germplasm (Lactuca sativa L.) Identified in Romaine and Butterhead Types for Warmer Plantings |
| title_full | Heat-tolerant Lettuce Germplasm (Lactuca sativa L.) Identified in Romaine and Butterhead Types for Warmer Plantings |
| title_fullStr | Heat-tolerant Lettuce Germplasm (Lactuca sativa L.) Identified in Romaine and Butterhead Types for Warmer Plantings |
| title_full_unstemmed | Heat-tolerant Lettuce Germplasm (Lactuca sativa L.) Identified in Romaine and Butterhead Types for Warmer Plantings |
| title_short | Heat-tolerant Lettuce Germplasm (Lactuca sativa L.) Identified in Romaine and Butterhead Types for Warmer Plantings |
| title_sort | heat tolerant lettuce germplasm lactuca sativa l identified in romaine and butterhead types for warmer plantings |
| topic | bolting heat stress tipburn |
| url | https://journals.ashs.org/hortsci/view/journals/hortsci/59/2/article-p151.xml |
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