Fig.1. Normal chromosome 1R and its structural changes found in the F₂ progeny of the hybrid between (cer)-CS with 1R and 4S¹ addition fines of CS. A: Normal 1R, B: Isochromosome of the long arms, C: Telosome of the long arm, D: Translocated chromosome 1BS/1RL, E: Translocated chromosome 4AL/1RL, F: Deletion of terminal regions of the both arms.