ABSTRACT: To improve the oil quality of the available sunflower genotypes by exploiting heterosis-breeding program. Four Cytoplasmic Male Sterile lines TS-17, TS-18, TS-228, TS-335 and four Restorer lines 291RGI, R-25, TR-9, TR-6023 sunflower parents and their sixteen F1 hybrids were evaluated in randomized complete block design with three replicates at Agricultural Research Institute, Tarnab, Peshawar. Highly significant genetic differences (p<0.01) were observed among parents and F1 hybrids for oleic acid (C18: 1), linoleic acid (C18:2) and behenic acid (C20:0). Mid and high parent heterosis estimates of F1 hybrids ranged from -100 to 157.31% and -100 to 113.59% for C20, –29.84 to 52.02% and –31.23 to 50.49% for C18:1, -20.12 to 16.19% and-20.66 to 9.69% for C18: 2 and –100 to 201.08% and –100 to 100% for C20:0 respectively. TS-335 x 291RGI has highest negative mid and high parent heterotic effects for TS-18 x R-25 has maximum positive mid and high parent heterosis for C18:1, TS-18 x TR-6023 has maximum positive mid and high parent heterotic effects for C18:2 and highest negative mid parent heterosis was observed for C20:0 by TS-17 x TR-9, TS-18 x 291RGI. It is concluded that the mid and high parent heterotic effects improve oil quality of the parent of these eight hybrids and are suggested for use in sunflower breeding program.
Pakistan Journal of Botany 05/2010; 42(2):1003-1008. · 0.84 Impact Factor