Cytogenetics of reciprocal hybrids between Triticum araraticum Jakubz., and Triticum monococcum L.

Reciprocal hybrids between T. araraticum and T. monococcllm were produced. Morphologically, F₁ hybrids were intermediate between the parent species and were completely pollen sterile. At the first meiotic division, T. araraticum - T. monococum hybrids showed a mean chromosome pairing of 4.95 I + 4.45 II + 1.95 III + 0.35 IV per cell, whereas mean chromosome associations for T. monococcum - T. araraticum hybrids were 5.08 I + 5.8 II + 1.08 III + 0.42 IV per cell. T. monococcum cytoplasm was relatively more conducive for bivalent formation than that of T. araraticum.