Cytological Studies on Intergeneric F1 Hybrid between Triticum and Secale, with Special Reference to the Number of Bivalents in Meiosis of PMC-s
1952 Volume 17 Issue 2 Pages 144-155
Details
1952 Volume 17 Issue 2 Pages 144-155
1. In the present investigation, cytological studies on the F1 plants, raised from T. durum×S. cereale, T. Spelta×S. cereale and T. vulgare×S. cereale, were carried out in meiosis of PMC-s.
2. In these F1 plants, the number of bivalents at heterotypic metaphase of PMC-s are as given in the following table.
3. In one F1 individual the bivalents were observed up to 11. The 7 bivalents in these 11 bivalents are due to the conjugation between the chromosomes of A and B genomes of Triticum, and the 3 bivalents in the remaining 4 bivalents are originated from the conjugation between the chromosomes of R genome of S. cereale, the-latter case being in accordance with the result of a cytological research by Levan (1942) in the haploid rye plant. The remaining one bivalent will be due to the conjugation between the chromosomes of D genome of Triticum.
4. There exists no homology between the chromosomes of ABD genomes of Triticum and those of the R genome of Secale.
