New wild Lactuca genetic resources with resistance against Bremia lactucae

Alex Beharav; Dalia Lewinsohn; Aleš Lebeda; Eviatar Nevo

doi:10.1007/s10722-004-1932-7

New wild Lactuca genetic resources with resistance against Bremia lactucae

Alex Beharav, Dalia Lewinsohn, Aleš Lebeda, Eviatar Nevo

Department of Evolutionary and Environmental Biology

Research output: Contribution to journal › Article › peer-review

Abstract

A total of 1027 genotypes of wild Lactuca spp. (L. serriola, L. saligna, and L. aculeata), originating from Israel, Jordan, East Turkey, Armenia, Kazakhstan, China, and various other countries in Europe were screened for resistance to the lettuce downy mildew (Bremia lactucae Regel). The genotypes of L. serriola (N = 962); L. saligna (N = 43); and L. aculeata (N = 22) were tested at the seedling stage with two isolates of B. lactucae (race Bl-21 and Isr-74) isolated from cultivated lettuce in Italy and Israel, respectively. Altogether, the isolates possess virulence against 17 out of 20 Dm genes/R-factors composing the established differential set of lettuce lines/varieties. They could therefore be used for preliminary detection of the presence of new resistance factors. A total of 83 and three genotypes of L. serriola and L. saligna, respectively, were resistant to infection by each of the two isolates alone as well as to the infection by a mix of the two isolates. These genotypes probably carry previously unknown resistance, and therefore could be suitable for exploitation by breeders and further detailed research. The wild progenitor of lettuce, L. serriola, and related species harbor significant untapped genetic resources for lettuce improvement.

Original language	English
Pages (from-to)	467-474
Number of pages	8
Journal	Genetic Resources and Crop Evolution
Volume	53
Issue number	3
DOIs	https://doi.org/10.1007/s10722-004-1932-7
State	Published - May 2006

Bibliographical note

Funding Information:
The Israel Ministry of Science, grant no. 2132, the financial support of the Israel Discount Bank Chair of Evolutionary Biology, and the Ancell Teicher Foundation for Molecular Genetics and Evolution supported this research. The authors wish to thank Dr. David Netzer for his advice, Ms. Souad Khalifa, Ms. Naela Meladi, and Ms. Lora Mhawesh for their technical assistance.

Keywords

Bremia lactucae
Genetic diversity
Lettuce downy mildew
Lettuce improvement
Plant genetic resources
Race-specificity
Sources of resistance
Wild lettuce
lactucea spp.

ASJC Scopus subject areas

Ecology, Evolution, Behavior and Systematics
Agronomy and Crop Science
Genetics
Plant Science

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10.1007/s10722-004-1932-7

Cite this

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title = "New wild Lactuca genetic resources with resistance against Bremia lactucae",

abstract = "A total of 1027 genotypes of wild Lactuca spp. (L. serriola, L. saligna, and L. aculeata), originating from Israel, Jordan, East Turkey, Armenia, Kazakhstan, China, and various other countries in Europe were screened for resistance to the lettuce downy mildew (Bremia lactucae Regel). The genotypes of L. serriola (N = 962); L. saligna (N = 43); and L. aculeata (N = 22) were tested at the seedling stage with two isolates of B. lactucae (race Bl-21 and Isr-74) isolated from cultivated lettuce in Italy and Israel, respectively. Altogether, the isolates possess virulence against 17 out of 20 Dm genes/R-factors composing the established differential set of lettuce lines/varieties. They could therefore be used for preliminary detection of the presence of new resistance factors. A total of 83 and three genotypes of L. serriola and L. saligna, respectively, were resistant to infection by each of the two isolates alone as well as to the infection by a mix of the two isolates. These genotypes probably carry previously unknown resistance, and therefore could be suitable for exploitation by breeders and further detailed research. The wild progenitor of lettuce, L. serriola, and related species harbor significant untapped genetic resources for lettuce improvement.",

keywords = "Bremia lactucae, Genetic diversity, Lettuce downy mildew, Lettuce improvement, Plant genetic resources, Race-specificity, Sources of resistance, Wild lettuce, lactucea spp.",

author = "Alex Beharav and Dalia Lewinsohn and Ale{\v s} Lebeda and Eviatar Nevo",

note = "Funding Information: The Israel Ministry of Science, grant no. 2132, the financial support of the Israel Discount Bank Chair of Evolutionary Biology, and the Ancell Teicher Foundation for Molecular Genetics and Evolution supported this research. The authors wish to thank Dr. David Netzer for his advice, Ms. Souad Khalifa, Ms. Naela Meladi, and Ms. Lora Mhawesh for their technical assistance.",

year = "2006",

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doi = "10.1007/s10722-004-1932-7",

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AU - Beharav, Alex

AU - Lewinsohn, Dalia

AU - Lebeda, Aleš

AU - Nevo, Eviatar

N1 - Funding Information: The Israel Ministry of Science, grant no. 2132, the financial support of the Israel Discount Bank Chair of Evolutionary Biology, and the Ancell Teicher Foundation for Molecular Genetics and Evolution supported this research. The authors wish to thank Dr. David Netzer for his advice, Ms. Souad Khalifa, Ms. Naela Meladi, and Ms. Lora Mhawesh for their technical assistance.

PY - 2006/5

Y1 - 2006/5

N2 - A total of 1027 genotypes of wild Lactuca spp. (L. serriola, L. saligna, and L. aculeata), originating from Israel, Jordan, East Turkey, Armenia, Kazakhstan, China, and various other countries in Europe were screened for resistance to the lettuce downy mildew (Bremia lactucae Regel). The genotypes of L. serriola (N = 962); L. saligna (N = 43); and L. aculeata (N = 22) were tested at the seedling stage with two isolates of B. lactucae (race Bl-21 and Isr-74) isolated from cultivated lettuce in Italy and Israel, respectively. Altogether, the isolates possess virulence against 17 out of 20 Dm genes/R-factors composing the established differential set of lettuce lines/varieties. They could therefore be used for preliminary detection of the presence of new resistance factors. A total of 83 and three genotypes of L. serriola and L. saligna, respectively, were resistant to infection by each of the two isolates alone as well as to the infection by a mix of the two isolates. These genotypes probably carry previously unknown resistance, and therefore could be suitable for exploitation by breeders and further detailed research. The wild progenitor of lettuce, L. serriola, and related species harbor significant untapped genetic resources for lettuce improvement.

AB - A total of 1027 genotypes of wild Lactuca spp. (L. serriola, L. saligna, and L. aculeata), originating from Israel, Jordan, East Turkey, Armenia, Kazakhstan, China, and various other countries in Europe were screened for resistance to the lettuce downy mildew (Bremia lactucae Regel). The genotypes of L. serriola (N = 962); L. saligna (N = 43); and L. aculeata (N = 22) were tested at the seedling stage with two isolates of B. lactucae (race Bl-21 and Isr-74) isolated from cultivated lettuce in Italy and Israel, respectively. Altogether, the isolates possess virulence against 17 out of 20 Dm genes/R-factors composing the established differential set of lettuce lines/varieties. They could therefore be used for preliminary detection of the presence of new resistance factors. A total of 83 and three genotypes of L. serriola and L. saligna, respectively, were resistant to infection by each of the two isolates alone as well as to the infection by a mix of the two isolates. These genotypes probably carry previously unknown resistance, and therefore could be suitable for exploitation by breeders and further detailed research. The wild progenitor of lettuce, L. serriola, and related species harbor significant untapped genetic resources for lettuce improvement.

KW - Bremia lactucae

KW - Genetic diversity

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KW - Lettuce improvement

KW - Plant genetic resources

KW - Race-specificity

KW - Sources of resistance

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IS - 3

ER -

New wild Lactuca genetic resources with resistance against Bremia lactucae

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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