Hybrid Seed Production in Helianthus annuus L. through Male Sterility Induced by Benzotriazole
Tripathi SM, Singh KP (2013) Hybrid Seed Production in Helianthus annuus L. through Male Sterility Induced by Benzotriazole. 2: 645
4 Pages Posted: 30 Jun 2013
Date Written: March 20, 2013
The effect of various concentrations of benzotriazole (C6H5N3) on plant morphology, days taken for first flowering, pollen fertility and yield in Helianthus annuus var. MSFH-17 was studied. All the treatments with this chemical hybridizing agent caused reduction in plant height, pollen fertility and yield component. One or two spray of 1% benzotriazole caused insignificant reduction in height and other parameters; however, these treatments induced almost complete pollen sterility among treated plants. On the other hand, the flowering was delayed in benzotriazole treated plants, in comparison to control ones. Plants treated once and twice with 1.0% benzotriazole showed 23.01 and 22.22 g total seed yield/plant, in comparison to 23.68 g total yield/plant produced by control plants. This reduction in yield was insignificant as analyzed by paired student’s ‘t’ test. The seeds of 1.5% benzotriazole treated plants showed significant enhancement in total yield in F1 generation from that of control plants due to heterotic effect.
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