C-BANDING AND NUCLEOLAR ACTIVITY OF TETRAPLOID AVENA SPECIES
C-BANDING AND NUCLEOLAR ACTIVITY OF TETRAPLOID AVENA SPECIES
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作者：
FOMINAYA, A;VEGA, C;FERRER, E
本文研究了燕麦属五个四倍体种的染色体Giemsa C-带带型。AABB种的染色体具有与A基因组种相似的C-带型。AACC种(A.maroccana和A.Murphy)具有两组七对染色体，其C-带模式与二倍体A和C基因组物种中观察到的相似。然而，在这两个染色体组和任何一个二倍体物种之间都没有发现很好的对应关系。当用银染分析物种的核仁组织者活性时，观察到的核仁和核仁组织者区域(NORs)比预期的要少，假设供体二倍体物种的核仁和核仁组织者区域(NORs)完全相加。
The Giemsa C-banding pattern of the chromosomes of five tetraploid species of Avena have been studied. The chromosome of AABB species (A. barbata, A. vaviloviana, and A. abyssinica) had similar C-banding patterns to those of A genome species. AACC species (A. maroccana and A. murphyi) possessed two sets of seven chromosome pairs with C-banding patterns similar to those observed in the diploid A and C genome species. However, no good correspondence between either of these two chromosome groups and any one diploid species has been found. When the nucleolar organizer activity of the species was analysed by silver staining, fewer nucleoli and nucleolar organizer regions (NORs) were observed than expected, assuming complete additivity of those from the donor diploid species.