Aneuploids and Revertant Diploids in the Progeny of Autotetraploid Pearl Millet

Aneuploid tetraploids with chromosome numbers 4n = 25 to 4n = 33 and revertant diploids (2n = 14) were recurrent features in several generations of autotetraploid pearl millet. Aneuploids as a class were not of an inferior plant type compared to euploids but they were less fertile and more variable...

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Bibliographic Details
Published in:Annals of botany 1982-10, Vol.50 (4), p.499-505
Main Authors: ARUNDHATI, K., RAO, P.S.R.L. NARASINGA, PANTULU, J. V.
Format: Article
Language:English
Subjects:
aneuploids
Aneuploidy
Chromosomes
Diploidy
Gametes
Millet
Pearl millet
Pearls
Pennisetum typhoides
Pennisetum typhoides (Burm.) S. & H
Plants
Pollen
revertant diploids
Seed set
Tetraploidy
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Summary:Aneuploid tetraploids with chromosome numbers 4n = 25 to 4n = 33 and revertant diploids (2n = 14) were recurrent features in several generations of autotetraploid pearl millet. Aneuploids as a class were not of an inferior plant type compared to euploids but they were less fertile and more variable in morphology. Their elimination was achieved by selection of bold seeds for sowing and vigorous seedlings for transplantation. Grown near each other both tetraploids and diploids showed lower seed set in open pollinated earheads than in selfed ones and an occasional triploid was recovered only from open pollinated tetraploids. Diploid revertants, recovered in most populations were often more vigorous compared to source diploids though some were weaklings. Evidence is presented indicating that aneuploid gametes were functional through only one parent, presumably the female.
ISSN:0305-7364
1095-8290
DOI:10.1093/oxfordjournals.aob.a086390