ArticleMolecular genetics and genomics : MGG2011
Evolution of nematode-resistant Mi-1 gene homologs in three species of Solanum.
Article in Molecular genetics and genomics : MGG, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 14 citations in OpenAlex.
- Characterisation and mapping of a Globodera pallida resistance derived from the wild potato species Solanum spegazzinii.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2024Article
- Physical Localization of the Root-Knot Nematode (Frontiers in plant science · 2019Article
- Broad Meloidogyne Resistance in Potato Based on RNA Interference of Effector Gene 16D10.Journal of nematology · 2015Article
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Authors and funding
2 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Plants have evolved several defense mechanisms, including resistance genes. Resistance to the root-knot nematode Meloidogyne incognita has been found in wild plant species. The molecular basis for this resistance has been best studied in the wild tomato Solanum peruvianum and it is based on a single dominant gene, Mi-1.2, which is found in a cluster of seven genes. This nematode attacks fiercely several crops, including potatoes. The genomic arrangement, number of copies, function and evolution of Mi-1 homologs in potatoes remain unknown. In this study, we analyzed partial genome sequences of the cultivated potato species S. tuberosum and S. phureja and identified 59 Mi-1 homologs. Mi-1 homologs in S. tuberosum seem to be arranged in clusters and located on chromosome 6 of the potato genome. Previous studies have suggested that Mi-1 genes in tomato evolved rapidly by frequent sequence exchanges among gene copies within the same cluster, losing orthologous relationships. In contrast, Mi-1 homologs from cultivated potato species (S. tuberosum and S. phureja) seem to have evolved by a birth-and-death process, in which genes evolve mostly by mutations and interallelic recombinations in addition to sequence exchanges.
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