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Tertiary trisomics in 2n = 12 Coix taxon

Sangeetha Diluraj


Tertiary trisomics have been isolated from the domesticated outcrossed population of a comparatively new taxon of Coix with 2n = 12 chromosome number and also from the selfed progenies of the chromosomal variants ranging from 2n=11 to 2n=13. Cytological analysis of these trisomics indicated that different chromosomal associations forming a trivalent, pentavalent and univalent were frequent at diakinesis. Disomics (2n = 12) and their monosomics (2n-1; 2n = 11) showing interchanged quadrivalents at diakinesis were observed to be the main sources of these tertiary trisomics.


Tertiary trisomics; Coix; Pentavalents; Interchanged quadrivalents.

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