Abstract
1. A cytological investigation on the Triticum-Secale triple F1 hybrid having 2n=44 chromosomes was carried out in maturation division of P. M. C. s.
2. The triple F1 hybrid having 2n=44 chromosomes was raised from primary hybrid T. turgidum×S. cereale F1, the chromosomes of which being 2n=23, with T. vulgare.
3. 21 chromosomes in the 44 ones seem to have come from T. vulgare as the pollen parent and the remaining 23 chromosomes from F1 plant of primary hybrid as the mother parent.
4. The number of bivalents and univalents in one P. M. C. at metaphase of first maturation division has shown to vary from 4 to 12 in the former case and from 20 to 36 in the latter one respectively.
5. The constitution of genoms, according to the result obtained in the present investigation on the maturation division in P. M. C. s of this triple F1 hybrid, will be represented by the following formula: AB (T. turgidum)+(R+2) (S. cereale)+ABD(T. vulgare).
