A field experiment was conducted with 28 hybrids generated by crossing 8 parents which are resistant to gall midge / blast / BPH in 8 x 8 diallel fashion during rabi 2004-05. The mean, heterosis (H 1 ) and heterobeltiosis (H2) were estimated for yield and quality characters. High amount of heterosis existed only for the yield components viz., panicle weight, 1000-grain weight and productive tillers plant -1 whereas, it was very low for the quality traits viz., kernel length and length / breadth ratio. The promising cross combinations identified for further use in hybrid rice programme were WGL 32100/ White ponni, JGL 1881/ White ponni and JGL 3844/ MTU 4870. The genotypes viz., WGL 32100, JGL 1881 and White ponny are useful for conversion into male sterile lines or identification of restorer lines because they are resistant to gall midge.
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Agricultural Students Union
Tamil Nadu Agricultural University
Coimbatore - 641 003
Tamil Nadu, India.
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