Diversity within and among Ethiopian barley (Hordeum vulgare L.) landraces in resistance to barley net blotch (Pyrenophora teres F. teres (Ptt))
| Autor: | B. J. K. Singh, Dawit T. Degefu, Allo A. Dido, Kassahun Tesfaye, M. S. R. Krishna |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Resistance (ecology) biology Apparent infection rate food and beverages Plant Science biology.organism_classification 01 natural sciences 03 medical and health sciences 030104 developmental biology Altitude Agronomy Pyrenophora teres Infection type Correlation analysis Hordeum vulgare Cultivar 010606 plant biology & botany |
| Zdroj: | Australasian Plant Pathology. 50:217-227 |
| ISSN: | 1448-6032 0815-3191 |
| DOI: | 10.1007/s13313-020-00764-y |
| Popis: | In this study, we evaluated a collection of 585 barley landraces along with 10 checks at Sinana Agricultural Research Center (SARC) and Bale-Goba research sites in 2018/19 and 2019/20 cropping seasons for resistance to net blotch (Pyrenophora teres F. teres (Ptt)). The experiments were laid out in an augmented complete block design. Data on agronomic performance and disease response were recorded. Analysis of variance showed highly significant variations between and within the landraces and cultivars in net blotch percent severity index (PSI), area under the disease progress curve (AUDPC), apparent infection rate, days to heading, plant height, number of fertile tillers per plant, seeds per spike, spike length and thousand seed weight. The overall mean net blotch epidemics varied from area under disease progress curve (AUDPC) of 86 to 1835. The disease was as high as AUDPC of 1378 on the susceptible check ‘Abdanie’. Similarly, the variations between and within barley landraces in terms of regions of origin, altitude classes and ear-types were significant. Out of the 585 barley landraces evaluated, 198 (33.85%) had significantly lower disease than the susceptible check, of which 12 (2.05%) and 186 (31.79%) landraces, respectively showed resistant (R) and moderately resistant (MR) infection types. The frequency of resistant landraces was more in third (2000-2500 m) and fourth (>2500 m) altitude classes and six-rowed and irregular barley types than in lower altitude areas and two-rowed ear-types. Furthermore, the correlation analysis among PSI and some yield components revealed adverse effect of the disease on grain yield of barley. |
| Databáze: | OpenAIRE |
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