Studies on heterosis for yield and yield components in mungbean [Vigna radiata (L.) Wilczek]

A study was carried out to estimate the magnitude of heterosis over mid and better parent for yield and yield components. Six parents viz., TARM-1, OGG-12, LGG-460, LGG-460, OGG-57, OUM 11-5 and Pant-M-4 were crossed in a 6-parent half diallel fashion to obtain 15 crosses. The six parents and their 15 hybrids were evaluated during rabi 2007. Data on nine quantitative characters including yield were recorded. Heterosis over mid parent and better parent for all the characters were recorded for all the 15 hybrids. Significant positive heterotic effect over mid parent and better parent was observed for grain yield/plant in hybrids OGG-12/LGG-460, LGG-460/Pant-M-4 and LGG-460/OGG-57. The heterosis for grain yield was found to be associated with heterosis for clusters/plant and pods/plant. The cross OGG-12/LGG-460 was the top heterotic cross which manifested 79.19 and 72.33% of higher yield over better parent and mid parent, respectively, whereas LGG-460 x Pant M-4 was the best performing hybrid which recorded the highest single plant yield of 6.85 g.