由于观察到黑麦染色体端粒所在部位异染色质区可能和小黑麦异常胚乳核的出现及谷粒皱缩程度有密切关系(Bennett,1977),现在已将很大注意力集中在异染色质区的后期复制上.然而,已知黑麦端粒异染色质最原始的效应之一,即新着丝点的活性还没有用现代分子和细胞学技术研究过.新着丝点的活性是染色体的一种次级动力学活性(Dartington,1965).已知在某些黑麦自交系里发生过,如’Weihenstephaner Winterroggen O_1’(Kattermann)1939)和’St- Because the heterochromatic regions of the rye chromosome telomeres are observed to be closely related to the appearance of abnormal endosperm nuclei and the degree of grain collapse in the rye (Bennett, 1977), much attention has been focused on heterochromatic However, it is known that one of the most primitive effects of rye telomere heterochromatin, ie, the activity of the new cusp, has not been studied with modern molecular and cytological techniques. The activity of the new cusp is chromosomal (Dartington, 1965), which is known to occur in some rye inbred lines, such as’ Weihenstephaner Winterroggen O_1 ’(Kattermann) 1939) and’ St-