Host status and phenotypic diversity of rice genotypes in relation to Pratylenchus brachyurus resistance
| Autor: | Fabio Biela, Isabela Hernandes, Andressa Cristina Zamboni Machado, Simone de Melo Santana-Gomes, Michelly Ragazzi Cardoso, Claudia Regina Dias-Arieira, Danielle Mattei |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Nematology Veterinary medicine education.field_of_study Oryza sativa biology Host (biology) Population 010607 zoology Pratylenchus brachyurus biology.organism_classification 01 natural sciences Crop Agronomy Genotype Genetic variability education Agronomy and Crop Science Ecology Evolution Behavior and Systematics 010606 plant biology & botany |
| Zdroj: | Nematology. 18:15-21 |
| ISSN: | 1568-5411 |
| DOI: | 10.1163/15685411-00002938 |
| Popis: | The aim of this study was to assess the susceptibility of rice genotypes toPratylenchus brachyurusand investigate the inheritance of resistance in the crop. Two experiments were conducted under controlled conditions, using naturally infested soil. Twenty-six rice genotypes were assessed, with maize used to show the susceptibility pattern. The maize was cultivated for 90 days and the initial nematode population was determined. Then, rice genotypes were cultivated, and the final nematode population and the reproduction factor (RF) were estimated 90 days after germination. All genotypes were susceptible toP. brachyurusin the two experiments but only one showed statistical differences, indicating variation in susceptibility, and genotypes Linhagem L03-107 and Cateto Amarelo scored higher than the control genotype, with RF of 8.80 and 9.48, respectively. Inheritance of resistance was poorly influenced by genotype genetics. Cluster analysis allowed the identification of five different groups of genotypes but there was low genetic variability among the genotypes. |
| Databáze: | OpenAIRE |
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