ABSTRACT
An experiment was conducted under farmer’s conditions at Pabna sadar, Rajshahi, Thakurgaon and Char land of Padma during 2015-2016 cropping season to study the performance of three genotypes viz I 124-07, I 133-07 and I 149-08 against standard variety Isd 36. The highest number of tiller (248.85x103ha-1) was found at Pabna sadarwhile the lowest was recorded at Char land of Padma (161.55x103 ha-1). The highest millable cane was produced at Rajshahi (107.19x103 ha-1) and the lowest (73.07x103 ha-1) was recorded at Char land of Padma. Among four locations the highest mean cane yield was recorded at Rajshahi (123.28 tha-1) while the lowest cane yield was obtained at Char land of Padma (71.06 tha-1). Highest brix % 21.75 was also recorded at Rajshahi whereas the lowest brix % was recorded at Thakurgaon (19.01%).

Key words: Performance, genotypes, farmers’ condition

Introduction

Sugarcane (Saccharum officinarum L.) is a vegetative propagated perennial crop. It is a cash crop and main source of raw material for production white sugar and gur in Bangladesh. It is grown in tropical and sub-tropical regions of the world in a range of climates from hot dry environment near sea level to cool and moist environment at higher elevations. Sugarcane is cultivated in many of the world countries with Brazil as a major producer followed by India, China, Thailand, Pakistan and Mexico (FAOSTAT, 2013). In Bangladesh, on an average 4.5 million metric tons of sugarcane is produced annually from 0.12 million hectares of land. In addition, presently average cane yield in Bangladesh is around 46 t ha-1 with average recovery of sugar is around 7.0% which is quite low in comparison to other sugarcane growing country (Islam et al., 2017). The sugarcane yield of a particular variety depends upon the heredity potential of the genotype and the environment where it is exposed during the course of its life cycle (Yadava, 2003). Variety of a crop plays an important role as regards to the yield and quality; sugarcane is no exception. Sugar industries in Bangladesh continuously need high yielding and high sugar varieties. After a considerable period of cultivation sugarcane varieties show a tendency to decline in yield and vigor. It is an obscure and puzzling problem to scientists, growers and processors. To maintain high yielding, it is necessary to replace varieties every few years with new genotype. It is necessary to ensure the performance of a promising clone in particular locations before recommendation. So, the present study was undertaken to ascertain the performance of promising genotype to requirement for varietal improvement in Bangladesh.