Morphology and Cytology of a New Species of Coix With 32 Chromosomes

抄録

The morphology and cytology of an accession of Coix collected from Madhya Pradesh has been studied in detail. Morphologically the plants are distinct from all the species so far on record. The plants invariably possess 32 chromosomes, a number new to the tribe, Maydeae. Karyotypic analysis shows a pronounced assymetry with regard to the ratio between the longest and the shortest chromosomes and the proportion of acrocentric chromosomes. The distinctive morphology supported by the different karyotype warrants a specific rank for this form of Coix. The possible mode of origin of this new form has been discussed in detail.