Background: Twenty distinct wheat genotypes were examined using the path coefficient analysis and correlation of yield-attributing and to determine their direct and indirect effects on grain yield using path coefficient analysis. The experiment was conducted in IAAS Paklihawa Campus, Bhairahawa in 2023 during the winter season in late sowing conditions.
Methods: Two replications in heat stress conditions along with recommended irrigation by the National Wheat Research Program (NWRP). Ten plants were randomly taken from each genotype as a sample plant to measure the six characteristics. Correlation and path coefficient were used for twenty genotypes including three check varieties.
Results: Spikelets per spike was highly positively and correlated with spike weight. Spike weight was highly positively and significantly correlated with thousand grain weight. Besides, Grain yield (YLD) showed a significant positive association with tillers per meter square. The other characters such as, spike length, plant height, spike weight, spikelets per spike and thousand grain weight are positively associated with yield trait.
Conclusion: Breeding efforts should be encouraged for the improvement of positively associated traits with yield trait in order to boost wheat yields under situations of heat stress.
correlation, path coefficient, breeding, genotypes, wheat
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