effect of trisomy on meiotic behaviour of interchange complexes in pearl millet, Pennisetum americanum (L.) Leeke

In the selfed progeny of a spontaneously produced triploid interchange heterozygote four different double trisomic plants were observed. In all the plants the frequency of alternate orientation of multivalents was lower compared to their respective types in the sib single trisomic plants. The freque...

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Bibliographic Details
Published in:Theoretical and applied genetics 1982-12, Vol.61 (4), p.333-336
Main Authors: Lakshmi, K.V, Koduru, P.R.K, Murthy, T.G.K, Rao, M.K
Format: Article
Language:English
Subjects:
Pennisetum americanum
plant breeding
plant genetics
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Summary:In the selfed progeny of a spontaneously produced triploid interchange heterozygote four different double trisomic plants were observed. In all the plants the frequency of alternate orientation of multivalents was lower compared to their respective types in the sib single trisomic plants. The frequency of alternate co-orientation of the interchange complex in these trisomics was also reduced compared to that of parental euploid disomic interchange heterozygotes. It is suggested that the presence of extra chromosomes influences the orientation behaviour of higher associations in different trisomics.
ISSN:0040-5752
1432-2242
DOI:10.1007/BF00272851