Chromosome counts of Asteraceae are reported from Mexico, the United States, the West Indies, Peru, and Bolivia. First counts are reported for 27 species, eight infraspecific taxa, and three interspecific hybrids in Brickellia, Chrysanthellum, Cirsium, Egletes, Erigeron, Flaveria, Gnaphalium, Heterotheca, Hieracium, Hymenothrix, Koanophyllon, Layia, Lessingia, Pectis, Sclerocarpus, Stuessya, Ta...

Previous chromosome information for 2n=34 and 2n=38 is restricted to one species in the Asian Begonia sect. Jackia with 2n=34, six Platycentrum 2n=38, respectively. We present here first counts of two B. sublobata emeiensis respective sections chingii Reichenheimia, karyotype analyses them as well re-examined chitoensis myanmarica Platycentrum. discussed evolution Jackia, Reichenheimia.

Chromosome counts and karyotypes were prepared from samples of dysplasia and carcinoma in situ of the uterine cervix in 14 patients with the use of tissue culture technics. The material for initial culture was identified as neoplastic epithelium in vivo by colpomicroscopy. Then a biopsy was obtained from within this area; one half was fixed for histologie examination, and in the remaining half,...

Original meiotic chromosome counts are presented for 39 species in 15 genera of Acanthaceae from Belize, Costa Rica, Ecuador, Mexico, Panama, the United States, and Venezuela. These reports include the first counts for 20 species representing 10 genera of the family, including the first chromosome number documented for the genus Poikilacanthus. Counts for 15 species confirm numbers previously r...

MicroRNAs target specific mRNA(s) to silence its expression and thereby regulate various cellular processes. We have investigated miRNA gene counts in chromosomes for 20 different species and observed wide variation. Certain chromosomes have extremely high number of miRNA gene compared with others in all the species. For example, high number of miRNA gene in X chromosome and the least or absenc...