Effect of seasonal variations on yield and its attributes in mungbean {Vigna radiata (L.) Wilczek}

Genetic variability, correlation and path coefficient were studied in 40 mungbean genotypes during kharif, 2017 and summer, 2018. High estimates of GCV, PCV, heritability and genetic advance were recorded for number of clusters per plant, number of pods per plant, harvest index and seed index exhibited high estimates of GCV, PCV, heritability as well as genetic advance as % of mean in both the season. Seed yield per plant showed significant positive correlation with harvest index, seed index and days to maturity during kharif and seed yield per plant showed significant and positive association with harvest index, number of pods per plant and biological yield during summer season. Path coefficient analysis revealed that harvest index had very high positive direct effect on seed yield followed by days to maturity and number of clusters per plant in kharif season while, biological yield per plant, days to maturity, number of primary branches had exhibited high positive direct effect on grain yield during summer season. The above mention of traits viz., number of clusters per plant, number of pods per plant, harvest index and seed index should be given due emphasis for future wheat genetic improvement because they possess high genetic variance, heritability coupled with high genetic correlation among themselves which may yield high genetic advance under proper selection pressure in a greengram breeding programme. Strong association of these traits revealed that the selection based on these traits would ultimately improve the seed yield. Hence, the above mentioned characters should be given topmost priority while formulating a selection strategy for improvement of yield in greengram.