抄録
1. Fertility of F2 plants : - The seed setting per spikelet of the F2 plants having 2n=42 chromosomes shows 2.4 times the fertility in percentage compared with the plants having 2n=41 chromosomes (Table 1). 2. Germination of F3 seeds : - The seed obtained from F2 plants having 2n=41 chromosomes shows higher percentage of germination than the seeds from that of 2n=42 cbromosomes (Table 2). 3. Chromosomes of F3 plants : - Somatic chromosomes of 163 individuals of F3 plants showed that they varied from 39 to 60 and their modes were 42 (Table 3). 4. Fertility of F3 plants : - The fertile individuals having 2n=42 chromosomes in 117 fertile F3 plants show the highest percentage with regard to the seed setting per spikelet (Table 6).
