Positional cloning of a gene for nematode resistance in sugar beet.
basic_science · Level V
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Abstract
The Hs1(pro-1) locus confers resistance to the beet cyst nematode (Heterodera schachtii Schmidt), a major pest in the cultivation of sugar beet (Beta vulgaris L.). The Hs1(pro-1) gene was cloned with the use of genome-specific satellite markers and chromosomal break-point analysis. Expression of the corresponding complementary DNA in a susceptible sugar beet conferred resistance to infection with the beet cyst nematode. The native Hs1(pro-1) gene, expressed in roots, encodes a 282-amino acid protein with imperfect leucine-rich repeats and a putative membrane-spanning segment, features similar to those of disease resistance genes previously cloned from higher plants.
Medical subject headings
- Cloning, Molecular
- Genes, Plant
- Membrane Proteins
- Nematoda
- Plant Diseases
- Plant Proteins
- Vegetables