Evaluation of indices for identification of pearl millet cultivars adapted to stress and non-stress conditions
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Title |
Evaluation of indices for identification of pearl millet cultivars adapted to stress and non-stress conditions
Not Available |
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Creator |
O. P. Yadav
S. K. Bhatnagar |
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Subject |
Pearl millet
Drought stress Selection indices Adaptation Stress environments |
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Description |
Not Available
Pearl millet (Pennisetum glaucum) is cultivated across a wide range of environments ranging from extremely stressful to favourable. The objective of this research was to compare methods to identify productive cultivars for stress and non-stress conditions. Thirty pearl millet cultivars were evaluated at 22 locations that were grouped as stress, non-stress, or intermediate environments. Five selection indices viz., arithmetic mean (AM), geometric mean (GM), AM (standard units), stress susceptibility index (S) and drought response index (DRI) were calculated for each genotype to determine correlation between selection indices and yield under stress (YS), non-stress (YNS), and average conditions (YAV). Both cultivars and locations were significant sources of variation. Phenology of cultivars had different influence on yielding ability in contrasting environments. While earliness was advantageous for stress conditions, cultivars with longer duration tended to yield more under non-stress conditions. YS was only moderately determined by YNS. Both AM and GM were suitable indices for selection of cultivars that would perform well across stress, non-stress, and intermediate environments. Stress susceptibility index (S) was negatively correlated with YS (r=−0.62∗∗) but should only be used as a selection criterion in combination with yield under stress (YS) to identify cultivars adapted to stress environments. DRI was positively correlated with YS but had no association with YNS. Results indicated that DRI might be useful for identifying cultivars with high performance under stress particularly when days to flower differ considerably among test entries. Not Available |
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Date |
2019-06-18T11:57:48Z
2019-06-18T11:57:48Z 2001-01-01 |
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Type |
Research Paper
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Identifier |
Not Available
Not Available http://krishi.icar.gov.in/jspui/handle/123456789/20594 |
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Language |
English
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Relation |
Not Available;
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Publisher |
Elsevier
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