Iris hookeriana
Genetics
### Genetics

As most irises are [diploid](/wiki/Diploid "Diploid"), having two sets of [chromosomes](/wiki/Chromosomes "Chromosomes"), this can be used to identify hybrids and classification of groupings.
It has a chromosome count or 2n\=22, or 2n\=24\.
Studies were carried out in 1978 by Karihaloo, V. (Chromosome numbers of irises from Kashmir. CIS Chromosome Inform. Serv. Vol.24 pages 21–22\), then in 1985 by Vir Jee, D. U. and P. Kachroo (Chromosomal conspectus of some alpine\-subalpine taxa of Kashmir Himalaya. Chromosome Inf. Serv. 39: pages 33–35\) and in 1989, by Jee, Vir, U. Dhar and P. Kachroo (Cytogeography of some endemic taxa of Kashmir Himalaya. Proc. Indian Natl. Sci. Acad., B 55 pages 177–184\).


What years did studies on iris chromosome numbers take place?