The fertility and germination of seeds raised on the F₁ plants obtained from (T.turgidum X S.cereale X T.unlgare) X T.turgidum and the external characteres and somatic chromosomes of its F₂ progeneies.

Abstract

1. In the present investigation were studied the fertiiity and germination of the seeds of F₁ plants, and the external characters, fertility, and somatic chromosomes of F₂ plants of backcrossed hybrids raised from Triticum-Secale triple F₁ hybrids pollinated with the pollen of Triticum turgiaum. 2. The number of somati_c chro, mosomes of the backcrossed F₁ plants that had shown the fertility was 30, 31 and 32. The fertility for spikelet in these backcrossed F1 plants having 2n= 30 chromosomes appears to vary from 5.0 to 11.3 percent, that to the case of 2n=31 chrom, osomes to vary from 1.3 to 31.4 percent and that in the case of 2n=32 chromosomes has shown 5.8 percent respectively (Table l). 3. The percentage of germination of F₂ seeds obtained on the backcrossed F₁ plants having .2n=30 chromosomes appears to vary from 5.6 to 43.8 percent, that in the case of 2n=31 chromosomes has shown to be 6.7 percent and that in the case of 2n=32 chromosomes 20.0 percent, viz. the seeds from F₁ having 2n=30 chromosomes showed the highest percentage in germination.