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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.
*National
Agricultural Research Centre (NARC), Islamabad, Pakistan.
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