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Co 0238 (Karan 4)

Varietal Profile

Co 0238 is a selection from the progeny of the cross CoLk 8102 x Co 775. This clone was identified from seedling ratoon nursery raised at Sugarcane Breeding Institute, Regional Centre, Karnal and was tested under the Pre Zonal Varietal Trial as K96‐450. It was selected as an early clone as it had pol % juice higher than CoJ 64 during November, January and March. The cane yield and sugar yield of Co 0238 was higher than that of CoJ 64.

Salient characteristics

Co 0238 had medium thick green yellow canes with cylindrical internodes, pentagonal buds, deltoid auricle and shallow bud groove. The clone is free from splits, spines on leaf sheath, pith and bud cushion. The fibre % is about 13.05 %. The jaggery is of A1 quality with light yellow colour. This clone is MR to the prevalent races of red rot pathogen by plug method of inoculation. However, it showed resistant reaction by nodal method of inoculation. Leaf drying during summer is common in this variety but farmers need not worry as it will not reduce cane yield.

Performance of Co 0238 in North Western Zone

This clone was evaluated under All India Co‐ordinated Research Project in the North Western Zone. It ranked 1st for cane yield (81.08 t/ha) , 2nd for sugar yield (9.95 t/ha) and 5th for sucrose % in juice (18%) in the zone. In comparison to the major check CoJ 64, it showed about 20 %, 16 % and 0.50 % improvement in cane yield, sugar yield and sucrose % in juice, respectively.

Ratoonability during winter

Co 0238 has been evaluated for ratoonability during winter. It is suitable for harvesting during winter as it gives good ratoon crop when harvested during winter. The reduction in cane yield of Co 0238, when harvested during winter, was just 4.66 % in comparison to cane yield recorded in spring harvested during spring. Whereas this reduction in cane yield in CoJ 64 was 41.29 %. Hence, it is suitable for taking 2nd ratoon crop under sub‐tropical conditions of the country.


Co 0238 was released by the Central Sub‐Committee on Crop Standards, Notification and release of Varieties for Agricultural Crops in 2009. These varieties would prove as high quality early maturing clones under assured irrigation, water stress or water logging areas. This variety is a suitable substitute for CoJ 64.


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IP & Time:
2021-11-27 17:41