Detection of structural heterozygosity and a varied chromosome number in Euphorbia pilosa L. from Kashmir, India

摘要

Two populations of Euphorbia pilosa L. (the Euphorbiaceaea) have been studied meiotically from Kashmir, India. Both the populations uniformly exist at a haploid chromosome count of n=10 which was confirmed at various stages of meiosis. The present chromosome count makes an addition to the intraspecific aneuploid cytotypes for the species. Harwan population (1,900 m) is meiotically normal with good pollen fertility, where as Dachigam (2,200 m) shows structural hybridity with only 45.61% pollen fertility. This is the first report of reciprocal translocation in the species.