Heterosis and inbreeding depression for yield and yield components in safflower (Carthamus tinctorius L.)
2010
D.Shivani, Ch. Sreelakshmi and C.V. Sameer Kumar
The results of the experiment on the magnitude of heterosis and inbreeding depression in 38 genotypes (15 F1s, their 15 F2s and 8 parents) foryield and its attributes revealed highly significant variations for all the genotypes and for all the characters studied. Two hybrids for earlinessand four hybrids for short stature exhibited significant negative standard heterosis, while four hybrids for number of capitula per plant, sevenhybrids for number of seeds per capitulum, five hybrids for test weight and three hybrids for seed yield exhibited significant positive standardheterosis. There was positive inbreeding depression in F2 generation for all the characters in majority of the hybrids. There was non significantheterosis and inbreeding depression for oil content in F1 and F2 generations respectively.
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