Chromosomal Polymorphism in <i>Saccharum spontaneum</i>: Numerical Variation in Accessions from Eastern India

Because of its importance in sugarcane breeding as a source high productivity and adaptability, efforts made to collect, conserve characterize Saccharum spontaneum accessions from different parts the country. Chromosomal diversity correlation with characters recorded during collection this species have been revealed through study 71 clones collected Jharkhand, state located eastern India. A total 11 cytotypes were identified four euploids [2n=40 (5x), 2n=56 (7x), 2n=64 (8x), 2n=72 (9x)] seven aneuploids (2n=54, 60, 62, 66, 70, 74, 76). Regular meiosis was observed predominant bivalent formation except clone IND 17-1853 (2n=72). Univalents meiotic abnormalities clone. The some somatic chromosome numbers confirmed analysis onsite data cytological studies.