| Autor: |
ANTRE, SURESH H., RAVIKUMAR, R. L., SUBRAMANYA, A. E. SUNIL, MEGHANA, K. J. |
| Předmět: |
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| Zdroj: |
Mysore Journal of Agricultural Sciences; Oct-Dec2021, Vol. 55 Issue 4, p340-348, 9p |
| Abstrakt: |
Drought stress may continue to be a major limitation for the crop productivity world wide and severity may increase with the changing climate scenario. Although the finger millet is renowned for its drought tolerance, drought stress at reproductive stage dramatically affects the grain yield. A field experiment was conducted over the two years during summer 2019 and summer 2020 to identify stable drought tolerant finger millet genotypes. Three hundred and fifty genotypes representing wide genetic variability available in finger millet were evaluated for grain yield per plant under drought stress and well watered conditions by following augmented design. Significant yield reduction was observed due to drought stress in both the years. The grain yield per plant under drought stress and well watered conditions were used to determine different drought tolerance indices (DTI) viz. geometric mean productivity (GMP), mean productivity (MP), harmonic mean (HM), drought resistance index (DRI), yield index (YI), yield stability index (YSI) for each genotype and year. The combination of drought tolerance indices over the two years were used to identify the stable drought tolerant genotypes. The genotypes viz. GE-1234, GE-1286 and GE-3003 were found to be the most drought tolerant across DTI and GE-1641, GE-4719 and GE-3722 were found to be highly susceptible. The tolerant genotypes recorded less than 26 per cent yield reduction under drought stress over the two years. On the other hand, the yield reduction was more than 76 per cent over the two years in susceptible genotypes. In the present study using combination of DTI, contrasting genotypes for drought tolerance were identified and were confirmed by yield reduction under stress environment for further use. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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