Abstract

                                Studies were carried out with the sized seeds of CSH 5 hybrid and its parents namely CS, 3541, ms. 2077 A and 2077 B. The seeds were size graded using 10, 5, 8, 7 ant 5 round perforated metal sieves. The relative difference in soud Vigour extant in sec size classes evaluated by a number of vigour tests such as germination energy, brick-gri test, chemical soak test, dry matter production and the vigour index revealed th superiority of the seeds retained by 10, 9 and 8 sieves both in the hybrid as well as in the parents Seeds of the restorer line and the hybrid were superior to the isogenic mala sterile and fertile lines in their vigour potential.

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