Diversification of the cytosterile base of sunflower requires utilization of alien cytoplasm in sunflower hybrid production but before incorporating them in breeding program, it is essential to study the impact of alien cytoplasm on seed yield and itsattributing traits. In the present study the CMS analog ARG-2-1-2 (H. argophyllus) was significantly better than MUT2-8-3-2 (H. annuus) for 100 seed weight, volume weight, seed yield, oil content and oil yield while it performed on par to 234 from classical (H. petiolaris) PET-1 source for these traits. Similarily, hybrids per se performance based on ARG-2-1-2 cytoplasm were superior over MUT-2-8-3-2. cytoplasm based hybrids for days to 50 per cent flowering, head diameter, days to maturity, 100 seed weight, seed yield, oil content and oil yield. The differences in these CMS analogues could probably be attributed to the favourable cytoplasmic effect nuclear interaction of ARG-2-1-2 cytosterile source over MUT-2-8-3-2 in both inbreds and hybrids.
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