Impact of Growing Environment on Anthracnose Severity of Switchgrass Cultivars and Clones
| Autor: | Lindsey Hoffman, Eric N. Weibel, Hilary Mayton, Laura M. Cortese Chaves, Stacy A. Bonos |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
biology Ecotype 020209 energy food and beverages 02 engineering and technology Plant Science Plant disease resistance biology.organism_classification 01 natural sciences Agronomy Colletotrichum navitas Biomass yield 0202 electrical engineering electronic engineering information engineering Panicum virgatum Cultivar Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Plant Disease. 100:2034-2042 |
| ISSN: | 1943-7692 0191-2917 |
| DOI: | 10.1094/pdis-01-16-0006-re |
| Popis: | Anthracnose (caused by Colletotrichum navitas) has the potential to significantly reduce biomass yield of switchgrass (Panicum virgatum L.); however, limited information is available on the impact of growing environment on tolerance of switchgrass to anthracnose. Therefore, the major objectives of this study were to (i) examine genotype–environment (G × E) effects on anthracnose severity in populations of switchgrass cultivars and individual genotypes and (ii) determine clonal repeatability estimates and stability analysis of anthracnose tolerance on individual switchgrass genotypes. Two experiments were conducted at one prime and two marginal soil locations in New Jersey. In all, 14 switchgrass cultivars were established from seed in 2008 for experiment 1 and 50 replicated switchgrass clones were planted in 2009 for experiment 2 at all three locations. Anthracnose was rated visually in 2010 for experiment 1 and in 2010 and 2011 for experiment 2. Significant G × E interactions were detected for both experiments (P ≤ 0.05) and anthracnose severity varied by location and cultivar. Clonal repeatability estimates for disease tolerance among clones was 0.78 on a clonal basis and 0.32 on a single-plant basis. Lowland ecotypes exhibited less disease overall than upland ecotypes. Results from this study indicate that selection for improved tolerance to anthracnose should be conducted after evaluation across several environments over multiple years. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|