The quantitative relationship between telomeric heterochromatin and secalin synthesis in Secale cereale L.

Abstract

The relationship between the amount of prolamine (secalin) synthesized and the amount of telomeric heterochromatin in ten inbred lines of rye (Secale cereale L.) cv .`Self Fertile Spring' was investigated . There was no association between the total amount of secalin synthesized and the amount of telomeric heterochromatin per haploid genome . However, a positive relationship was found between total secalin synthesis and the amount of telomeric heterochromatin on the short arm of chromosome 7 (7RS) . Lines synthesizing high levels of secalin were found to have approximately 60% less telomeric heterochromatin on chromosome arm 7RS than lines synthesizing low levels of secalin . There was no positive relationship between secalin synthesis and the amount of telomeric heterochromatin present on any other telomere . IntroductionThe agronomic potential of triticale (X Triticose-