Further results on chromosome stability of hexaploidTriticale

✍ Scribed by T. Tsuchiya; E. N. Larter

• Publisher: Springer
• Year: 1971
• Tongue: English
• Weight: 314 KB
• Volume: 20
• Category: Article
• ISSN: 0014-2336
• DOI: 10.1007/bf00034215

✦ Synopsis

Chromosome variation was studied in bulk populations of 27 advanced strains of hexaploid Triticale . Average frequency of euploids (2n = 42) in the 27 strains analyzed was 81 .5 % with a range from 57 .2 % to 100 .0 % . Three strains showed particularly high aneuploid frequency in the bulk population ; the average frequency for the three strains was 39 .0 %, while the mean for the other 24 strains was 14 .8 % . The progenies of 42-chromosome plants derived from the aforementioned three strains had 89 .4 % euploids on an average . It is assumed that a monosomic plant was selected in a singleplant (or spike) selection during the breeding period . The frequency of aneuploids is very high, even after several generations of breeding . Routine chromosome checking is recommended in breeding Triticale and other cytologically unstable induced amphiploids .