Indian Journal of Genetics and Plant Breeding (The)

Genetic analysis of three gamma-ray induced translocation lines in barley cultivar ‘K 12’ was made to identify the chromosomes involved and to locate breakpoints from F₂ data. Partial sterility showed linkage with markers on chromosome 1 and 4 in the 3047, 1 and 3 in line 3103 and 4 and 7 in line 3104. These lines were designated as T 1–4 (3047), T 1–3 (3103) and T4–7 (3104). In T 1–4, PS showed 25.73±3.70 per cent cross over value with k and the breakpoint was located towards the centromere of chromosome 4. T 4–7 breakpoint was located near the centromere of chromosome 4, the distances from genes k and bl being 18.01 ±3.91 and 19.77 ±4.21 cross over units, respectively. In chromosome 7, T 4–7 was found to be 26.57 ± 5 • 63 cross over units away from s gene and it was placed in the short arm.