Indian Journal of Genetics and Plant Breeding (The)

Comparative analysis of chiasma frequencies and terminalization in seven varieties of T. carthlicum and one variety of T. persicum have been attempted at late diplotene/diakinesis and metaphase I, Variety EC 119466 showed highest chiasma frequency at both the phases. Relative ranking for mean bivalent length is more or less similar except for var. EC 119463, T. persicum, EC 119467 and V-1063, suggesting differential rate of condensation. Observations on chiasma frequencies and terminalization indicate isolation of persicum from other varieties of carthlicum, though it is not abrupt as carthlicum var. fulginosum also showed heterogeneity with other carthlicum varieties.