Nullisomy to Hexasomy in Coix gigantea (Poaceae)

Abstract

A series of aneuploids, starting from nullisomy (2n-2 i. e. 2n=18) to hexasomy (2n+4 i. e, 2n=24), has been isolated from a natural wild population of Coix gigantea Koen ex Roxb., a member of the tribe Maydeae of Poaceae. Among a total of 96 aneuploids isolated, the various chromosomal variants appeared as: 68 nullisomics, 13 monosomics, 12 trisomics and one each a tetrasomic, a pentasomic and a hexasomic. Higher polysomics-the pentasomic and the hexasomic-are reported for the first time in plants.