Co 11015 (Atulya) has been notified for cultivation in Tamil Nadu as a short duration variety in the 83 rd meeting of Central Sub Committee on Crop Standards, Notification, Government of India. This variety combines high cane yield and high sucrose content right from 8 months to 12 months of crop age. Co 11015 is evolved from the cross CoC 671 and Co 86011 at ICAR-Sugarcane Breeding Institute, Coimbatore. The clone showed a remarkably good performance in the clonal trials with clear superiority over the standards Co 86032 and CoC 671. In station trials, it recorded a cane yield of 135.70 t ha -1 , sucrose of 21.46 % and sugar yield of 20.09 t ha -1 at 360 days. Fig. 2. Morphological features of sugarcane short duration variety Co 11015
Combining ability estimates were obtained from line x tester analysis of crosses involving five male sterile lines and seven pollinator varieties. Predominance of non-additive gene action was observed for all the characters studied. Ponni for productive tillers per plant and total drymatter accumulation and IR 58025 A for grain yield per plant and total drymatter accumulation were identified as superior parents with high per se performance and significant gea effects. The cross combinations V 20A X IR 50400-64-1-2-2-2, PMS 10A X Ponni and IR 6829A BR 736-20-3-1 were found to be the best specific combiners. The crosses showing significant sea for grain yield per plant were obtained from good X good, good X poor, poor X good and poor X poor combinations.
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