New pepper accessions proved to be suitable as a genetic resource for use in breeding nematode-resistant rootstocks
| Autor: | Alfredo Lacasa, Elena Sánchez-López, C. Ros, Carmen María Lacasa, María del Mar Guerrero, Fulgencio Sánchez-Solana |
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| Rok vydání: | 2015 |
| Předmět: |
0106 biological sciences
biology 04 agricultural and veterinary sciences Plant Science biology.organism_classification 01 natural sciences Horticulture Nematode Meloidogyne arenaria Pepper 040103 agronomy & agriculture Genetics Meloidogyne incognita 0401 agriculture forestry and fisheries Cultivar Rootstock Agronomy and Crop Science Terra incognita Meloidogyne javanica 010606 plant biology & botany |
| Zdroj: | Plant Genetic Resources. 14:28-34 |
| ISSN: | 1479-263X 1479-2621 |
| DOI: | 10.1017/s1479262115000027 |
| Popis: | Root-knot nematodes (RKNs), Meloidogyne spp., are considered, worldwide, as one of the main pathogens of solanaceous crops, including pepper (Capsicum spp.). Restrictions on the use of standard nematicides have motivated the development and use of resistant cultivars and rootstocks. Three genes in pepper, called Me1, Me3 and N, confer resistance to the three main RKN species (Meloidogyne incognita, Meloidogyne javanica and Meloidogyne arenaria). However, their effectiveness seems to be limited because nematode populations that have overcome the resistance have been found, leading to a search for new sources of resistance and strategies to preserve their effectiveness. In two greenhouses and over a 7-month growing period, we evaluated the resistance to M. incognita and the agronomic behaviour as rootstocks of nine pepper (Capsicum annuum) accessions – HDA330 (Me1 carrier), Serrano Criollo de Morelos, (Me3 carrier), Yolo Wonder (partially resistant) and another six accessions of unknown resistance originating from cultivars well adapted to the local growing conditions. The resistance conferred by the Me1 gene was more robust than that conferred by Me3. Resistance to M. incognita was found in four new accessions: P13, CTL, CT5, and P14. In P13, the level of resistance was similar to that of HDA330. The resistant accessions showed better agronomic behaviour than the susceptible accessions, which was most noticeable towards the final of the growing period. Some accessions constitute a potential resource for use in the genetic breeding of RKN-resistant rootstocks. |
| Databáze: | OpenAIRE |
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