NUCLEOLAR DOMINANCE AS OBSERVED IN BARLEY TRANSLOCATION LINES WITH SPECIFICALLY RECONSTRUCTED SAT CHROMOSOMES

被引:44
作者
NICOLOFF, H
ANASTASSOVAKRISTEVA, M
RIEGER, R
KUNZEL, G
机构
[1] ACAD SCI BULGARIA,INST MORPHOL,BU-1113 SOFIA,BULGARIA
[2] AKAD WISSENSCHAFTEN DDR,ZENT INST GENET & KULTURPFLANZENFORSCH,DDR-4325 GATERSLEBEN,GER DEM REP
关键词
Barley; Nucleolar dominance; Nucleolus; Nucleolus association; Translocation lines;
D O I
10.1007/BF00265358
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Diploid homo- and heterokaryotypes of barley translocation lines with only one satellite chromosome pair containing two nucleolus organizer regions (NORs) in opposite arms were found to show repressed nucleolus formation by the transposed NOR as evident from the formation of only micronucleoli. The same was true for auto-tetraploid homokaryotypes and for translocation lines with all NORs tandemly arranged into the same chromosome arm. When NORs were transposed to chromosomes without NOR in the standard karyotype, the normal pattern of nucleolus formation remained unaffected. The modified mode of nucleolus formation after the combination of all NORs in one chromosome pair is interpreted to be due to intrachromosomal nucleolar dominance analogous to interchromosomal nucleolar dominance observed in certain interspecific hybrids. © 1979 Springer-Verlag.
引用
收藏
页码:247 / 251
页数:5
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