Abstract
SUMMARYA new strain of Trigonella foenum-graecum has B-chromosomes indistinguishable from chromosomes of regular complement. Study of carrier plants revealed that both somatic and meiotic carrier cells have 2B chromosomes. In PMCs the 2B chromosomes pair to form a bivalent that behaves normally during meiosis. The carrier cells of root, shoot, leaf and petal tips show 18 chromosomes besides 16 chromosomes in non carrier cells. Genetic mechanism ensuring 2Bs in the carrier cells is discussed. Their regular meiotic behaviour, indistinguishable and euchromatic nature, indicate comparatively recent origin. It has been found that the plants having lower B frequency in the PMCs have lower average values of its various parts and vise versa. There is a random distribution of chromosomes in the various plant parts but the interesting point to note is that the total mean values of carrier cells in PMCs, shoot tips, leaf tips and root tips of all carrier plants is almost the same.
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