PJB-2011-210
SELECTION INDEX BASED ON PERFORMANCE AND HYBRID VIGOUR OVER FOUR GENERATIONS AND ITS RELATIONSHIP WITH DIVERSITY IN ELEVEN CROSSES OF VIGNA MUNGO (L.) HEPPER
ABDUL GHAFOOR* AND MUHAMMAD ARSHAD
Abstract
Six cultivars of blackgram Vigna mungo (L.) Hepper selected from genetically diverse groups based on three years evaluation under field conditions were crossed and generations were advanced accordingly. The final experiment consisting 4 generations of 11 hybrids along with their respective parents were evaluated in four replications at N.A.R.C., Islamabad, Pakistan. The source of variation was attributed to both the factors, i.e., hybrids and generations representing high proportions of the total sum of squares. Two factors gave eigen values greater than unity and these contributed 77% of the total variability. A clear response for grouping of F1 and F2 was observed, whereas other two generations were intermixed, although a low level of separation was observed. On the basis of performance and hybrid vigour, three hybrids; Mash 3/Mash 1, BG 9012/BG 9025 and BG 9020/Mash 1 exhibited better potential. The hybrids with high mean performance and hybrid vigour are expected to give better chance for selection to develop superior cultivars of blackgram.
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