GrainGenes Reference Report: TAG-87-17
Reference
TAG-87-17
Title
Synaptic patterns of rye B chromosomes. II. The effect of the standard B chromosomes on the pairing of the A set
Journal
Theoretical and Applied Genetics
Year
1993
Volume
87
Pages
17-21
Author
Diez M Jimenez M Santos J
Abstract
In order to elucidate the possible effects of rye B chromosomes (Bs) on synapsis and metaphase-I associations of the A set, a comparative study between pachytene and metaphase-I-cells of rye plants carrying different numbers of Bs (O-8) has been carried out The number of Bs was found to be positively correlated with the frequency of synaptic irregularities of the A set, ie multivalents and foldback pairing, and with the frequency of pachytene interlockings It is proposed that interlockings are the origin of these irregularities because both appeared in close proximity in many nuclei. Examples of A-B pairing are described. The frequency of synaptic abnormalities seems to be unrelated to the mean of A-chromosome-bound arms at metaphase I.
Keyword
b-chromosomes
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GrainGenes Reference Report: TAG-87-17
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||